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New Mineral Names*

New Mineral Names*

American Mineralogist, Volume 69, pages 810-815, 1984

NEW NAMES*

Pere J. DuuN. Mrcunel FLerscHEn, Cenl A. FneNcrs, Rrcgnno H. LnNcr-ey, SrepneN A. KlssrN, Jnur,s E. Snrcr-By. Devro A. VnNxo. AND JANETA. Zl-czen

Ascharnalmite* 016 . 7.01 H2O. The ideal formula is CaMn?* Si3 016 . 7H2O. Mn valenceassigned the the relation- W. G. Mumme, G. Niedermayr,P. R. Kelly, and W. H. Paar on basisof Gladstone-Dale ship and the red color of the crystals. Bostwickite is readily (1983)Aschamalmite, Pb5.e2Bi2 66Se, from UntersulzbachVal- soluble in | : I HCl. to mineral ley in Salzburg,Austria-"monoclinic heyrovskyite". Neues It does not belong any known Jahrb.Mineral., Monat., 413444. family. Bostwickite crystals are not suitable for single crystal X-ray Microprobeanalysis yielded Pb 62.95,Bi 22.56,and S 14.89, study. The strongestlines (19 given) in the unindexedpowder sum 100.4%,which givesan empiricalformula (on the basisof S patternare: I l. 3(100), 3. 548(30), 2,898(30), 2.567 (40), 2.262(25), : 9) Pb58eBi2.osse. The normalized empirical formula (on the and,2.238(25\.D meas.2.93. basis of S : 8.96 to maintain charge balancefor the given metal Bostwickite was found at Franklin, New Jersey in 1874 as content) is Pb5e2Bi2.66Se. Single-crystal Weissenberg X-ray data divergent sprays of bladed crystals about 250 pm in length. It is from a small prismatic crystal showed it to be monoclinic. sp-ace opticallybiaxial negative,2V : 25", a = 1.775(5), = 1.798(3), " F grotp C2lm,Cm, or C2, with a : 13.71,b = 4.09,c : 3l .434,P y: 1.E00(3);strong dispersion r < y; stronglypleochroic X = f = 91.0",V = 1762.1.3.43.The strongestX-ray lines(32 given) are = red-brown, 7 : yellow-brown; absorption X = Y > Z. Optical 3.42(r00x209), 3.378(88X208),2.941(s4)(n7), 2.926ts4)Gtr, orientation describedonly relative to crystal shape:Zil length, Izll 2.861(48X20,m),and 3.s25(42XI t4). width, Xll thin dimension of laths. H approximately L The mineraloccurs as -gray,lathJike crystalsto 5 cm in The namehonors Richard C. Bostwick, a collectorof Franklin lengthor thick, slightlybent plates up to I cm2.Most crystalsare . Type specimens are preserved in the collections of heavily altered to a mixture of bismutite and other as yet Harvard University and the United States National Museum unidentifiedphases. Exsolution lamellaeof galenaand cosalite (SmithsonianInstitution). arecommonly present. Luster metallic, (001) perfect, D Discussion: The optical data imply that the mineral is ortho- 7.33 derived from the normalized empirical formula. Creamy rhombic. C.A.F. white in reflectedlight without discerniblepleochroism in air. Moderatelyanisotropic gray to red-brown.Hardness (VHNzs) : 150-l8l kg/mm2.Reflectance in air (nm,Vo)470, 45.1-48.1; 546, 43.4-46.3;589, 42.9-46.3: 650. 42.946.1. Clinokurchatovite* Aschamalmiteis found in mineralized,alpine-cleft veins cut- S. V. Malinko and N. N. Pertsev (1983)Clinokurchatovite, a ting through gneiss near Ascham Alm in the Untersulzbach new structural modification of kurchatovite. Zapiski Vses. Valley associatedwith , albite, adularia,, chlorite, Mineralog.Obshch., ll2, 483487. andgalena. It is closelyrelated to heyrovskyiteand severalother naturaland syntheticphases in the Bi2S3-PbSsystem. It is not Analyses of several grains of the mineral by electron rnicro- thought to be a dimorph of heyrovskyitebecause the latter is probe showed variable composition CaO 32.29-32.5, MgO alwaysAg-substituted. 21.21-22.6,MnO 0.4-1.82, FeO 6.16-8.2, BzOr Oy difference The nameis for the locality.Type materialis in the Museumof from 1007a)37.1-38.52. sum 100.002o.The ideal formula is Natural History in Vienna, Austria, and at the Division of Ca(Mg,Fe,Mn)B2O5.Analyses of kurchatovite are given for Mineral Chemistry,csrRo, Port Melbourne,Victoria, Australia. companson. J.E.S. X-ray study shows the mineral to be monoclinic, unit cell a = 12.19+0.074,D = 10.95+0.05A,c : 5.59+0.02A.The strongest lines (49 given) are 3.093(S0X230),3.045(t00X221), 2.799(100) Bostwickite* (102); 2.586(50)(231), 2.027(s0)(3tz), 1.937(80X042), 1.236(s0)(s72). P. J. Dunn and P. B. Leavens(1983) Bostwickite, a new calcium The mineral occurs as a modification of earlier formed kurcha- manganesesilicate hydrate from Franklin, New Jersey.Miner- tovite, and forms polysynthetically-twinnedcrystals several al. Mag., 47 387-389. tenths to 2 mm in size. It is associated with kurchatovite, An electron microprobe analysisgave MgO 0.9, CaO 5.1, suanite, ludwigite, szaibelyite, , pyroxene, harkerite, Mn2O356.3, Fe2O3 0.5, Al2O3 1.0, As2O5 1.0, SiOr 20.l, HrO l5.l sakhaite,calcite, vesuvianite, clinohumite, svabite and sphaler- (by difference), sum 100 wt.Valeading to the empirical formula ite in borate-bearingrocks in a numberof areas.H 4.5. D 3.07- 3.08 (hydrostaticsuspension). (ca6 75Mg6'n)>o ,s(Mn3lnrFealor)>u 02(Si2 roAlo ,uAsSlor)>,o, Optically biaxial, zs a: 1.642- 1.U4, B : 1.674-1.675,"y = 1.699-1.704(all +0.002),2V : E2- E8'meas., t0l0l n Z: 52",t0l0l n IZ= 38", tl00l n Z = 26", * Minerals marked with asteriskswere approved before publica- tl00lnY=64". tion by the Commissionon New Minerals and Mineral Names of Samplesof clinokurchatoviteare at the MineralogicalMuse- the International Mineralogical Association. um,Acad. Sci. USSR, Moscow. D.A.V, 0003-004x/84/0708-08l 0$0. 50 810 NEW MINERAL NAMES 8il

Daqingshanite* 5.2e(I00)( rT l ), 4.47 (30)(rt1 ,200 ,zTD , 3.4s2(3o)(1T2) , 3.277 (40)(012,320,2r r), 3.2 r 3(30X l 30). R. Yingchen,X. Lulu, and P. Zhizhong(1983) Daqingshanite, a Ferrostrunzite occurs as flattened prisms to 0.5 mm that are new mineral recently discovered in China. Geochemistry elongated parallel to and are flattened parallel to the (China),2, 180-184(in English). [001] pinacoid {100}.Light brown color and . H (est.) about 4. D Analysis by wet chemical (?) methods and gas chromatogra- calc.2.57, meas. 2.50. Very brittle. Luster vitreous.Cleavages: phy gaveBaO 15.9E,SrO 26.10, CaO 6.17, MnO 0.02,MgO 0.72, parallel to the length of the crystal; a secondperpendicular to the RE oxides 20.736,'lho2 0.04, Al2q 0.18, Fe2O30.21, P2O5 optic normal; and a third perpendicular to Bra. Optically biaxial 11.73,CO216.19,K2O 0.03, NazO 0.13, H2O+ 0.68, F 0.80,sum (-),2V: 80(5)',a = 1.628(2),B: r.682(calc.),y = l.7B@), 99.716 - (O-Fr) = 9.376Vo. This corresponds to an empirical Znc - 3-4". Dispersion moderate and asymmetric. Absorption formula of (Srr 53Ca667Baa 53Mg6 I 1Na6or)z su (REo ,"Alo oz minimum parallel to Z. PleochroismX : faint yellow-green,Z : Fe8ir)o eo(por)roo(Co:)z 23(oH)o 46ForuUo or)o rn, or ideally (Sr, faint red-yellow. Ca,Ba)3RE(PO4XCO3)3-*(OH,F)"whereSr)Ca, BaandOH > F, Ferrostrunzite is found as radiating spraysoffibrous prismatic and x = y : 0.8. The rare earth oxideswere La2O37.88, CezOr crystals encrusting rockbridgeite which has replaced fossil bel- 10.16,PruOtt 0.70, Nd2O3 1.59, Sm2O3 0.106, Eu2O3 0.02, Gd2O3 emnites. These fossils occur in Cretaceoussediments along 0.12,Tb4O7 0.05, Dy2O30.03, Ho2O30.03, Er2O30.01, Tm2O3 Raccoon Creek near Mullica Hill. The mineral is named for its 0.01,Yb2Or 0.02, and LuzOr0.01. isostructural relationship with strunzite and its unique chemis- X-ray study (Weissenberg,oscillating crystal) shows the min- try. Samples are preserved at the Smithsonian Institution in eral to be trigonal with a rhombohedrallattice, spacegroup R3m, Washington.J.E.S. R3m, or R32. Unifcell^parameters (hexagonalorientation) a : 10.05E(3),c:9.225(3)4, y:808.2026A3,2 = 3, and(rhombo- : : = hedralorientation) cs 6.570(3)4,an 9.87(3)", V 26934A3. Hingganite-(Yb)* Strongest powder diffraction lines (for FeKa; 25 given) are 3.95(60X202T).3. I6( | 00X2022),2.52(70)Q24U. 2. I I (50X303-3), A. V. Voloshin,Ya. A. Pakhomovskii,Yu. P. Men'shikov,A. S. (1983) 2.04(60)(202-4,| .94 | (6qQ4B ). U ni t -ce I I parameters confirmed Povarennyk,E. N. Matvinenko,and O. V. Yakubovich by both ditrraction and single-crystalmethods. Hingganite-(Yb), a new mineral from amazonitepegmatites of Daqingshanite occurs as small, rhombohedral crystals with the Kola Peninsula,Doklady Akad. Nauk S.S.S.R.270,ll88- rounded edgesabout 0.05 mm in size. Color pale yellow, luster ll92 (in Russian). greasy-glassy,streak white, cleavage{l0Tl} perfect,conchoidal Electron microprobe analyses of hingganite and hingganite- . MicrohardnessVHN29 335, D calc. 3.71, meas. 3.81. (Yb) gave,respectively, Y2Og 24.E3,8.56 ; YbzOr 17.02,34.07; Optically uniaxial (-), = = e 1.609,r.r 1.708,colorless in thin Er20 7 6. 47, 8.22 ; D yzO t 2. 13,2. 47 ; LuzOt I .87, 4. 50 ; TmzO3I .38, section, non-fluorescentin UV light. Exhibits infrared absorp- 3.10;HozOg 0.21, 1.03; Tb2O3 0.33, 0.05; CaO 2.3E,1.14; PbO tion bandsfor CO2, POa,and HzO. Hardly soluble in ammonium 0.52,- ; Fe2O31.46, - ; AlzOr0.10, - ; SiO226.43, 22.11 ;BeO acetate but readily dissolved in dilute hydrochloric acid. 10.50,10.90 ; HzO (by difference)3.92,3.74%. For hingganite- The mineral occurs in monomineralic aggregatesin veins (Yb), this gives (Yb6 a5Yg26Er6.11Lu6.65,Cas 65Tm6 *Dyo or cutting in the footwall zone of the Bayan Obo iron ore Ho6,61)H1e6Be1 13Si6e6Os, or (Yb,Y)BeSiO+(OH) (for hing- deposit. The deposit consists of Proterozoic layered dolomite ganite,(Y,Yb)BeSiO+(OH)). The infra-redspectrum is given. and minor arkose units which host the iron mineralization. The X-ray study showed the mineral to be monoclinic, spacegroup carbonatemineralogy quite of the deposit is complex. Minerals F21la,a = 9.888,b = 7.607,c:4.740A, B:90.45",2 = 4,D associatedwith daqingshaniteinclude benstonite, , stron- calc. 4.83. The X-ray pattern is similar to that of the synthetic tianite,, ,and . compoundH2Y2Be2Si2O16 (Am. Mineral., 59, 700-708(1974)). Preliminary study of the of the mineral shows The strongest X-ray lines (62 given) are 6.06(7Xll0), it hasa calcite-typestructure similar to that of huntite.Extensive 3.l3(l0x2l l, 2| l), 2.85(loxr2r), 2.s72(8)(3l l), 2.542(8X3l l), isomorphous substitution of both anions and cations is evident. r.977(8)(122,r22). The name is for a mountain near the ore deposit. J.E.S. Colorless,transparent, luster vitreous,no cleavage.H 6 - 7. Opticallybiaxial, positive, ns a: 1.725,p = 1.738,y = 1.760, 2V + 65",2 Ac:23",X Ac: 20",plane ofoptic axis(010). The Ferrostrunzite* mineral forms sphericalaggregates offine acicular crystals up to 2 mm long, width 0.1-0.2 mm. It grows on plumbomicroliteand D. R. Peacor,P. J. Dunn, and W. B. Simmons(1983) Ferrostrun- in violet in amazonitepegmatites of the Kola Peninsula, zite, the ferrous iron analogueof strunzite from Mullica Hill, U.S.S.R. and was formed by very late-stagereplacement reac- New Jersey.Neues Jahrb. Mineral., Monat., 524-528. tions. Microprobe analysisgave P2O528.1, FeO 13.9,FezOr 30.9, The name is for the relation to hingganite(description not yet MnO trace, HzO (by difference)27.1, sum 1007o,corresponding published).Type material is at the FersmanMuseum, Acad. Sci. to FefrjrFel!"(Po4)2 oo(OH)rs4 . 6.68H2O (p : 2), or idealty USSR. Moscow. M.F. Fe2+Fel*(PO4)z(OH)z' 6H2O. The Fe2*: Fe3* ratio of l :2 was establishedby microchemical tests and in part of the basis of known structural relationships to strunzite. Katayamalite* X-ray study shows the mineral to be triclinic, spacegroup PT or Pl, unit cell a = 10.23(2),b :9.77(3), c = 7.37(l)4, a = N. Murakami, T. Kato and F. Hirowatari (1983)Katayamalite, a E9.65(16f,9 = 98.28(12)",y = 117.26(16)",V:646(4)A', andZ new Ca-Li-Ti from lwagi Islet, Southwest : 2. The strongest lines (34 given) are 8.94(80X100), Japan. Mineralogical Journal, ll, 261:268. 812 NEW MINERAL NAMES

Katayamalite (ideal composition (K,Na)Li3Ca7(Ti,Fe+3, X-ray study showedkostylevite to be monoclinic,space group Mn)2[Si5,O1s]2(OH,F))is found as a fine-grainedaccessory min- F2Ja,a= 13.l7r(4),b: ll.7l7(4),c = 6.565(2)A,P105.26",2 eral (0.3-0.5 percent by votume) in (coexisting = 2 (KnZrzSieOrs' 2H2O,). D ca1c.2.79,meas.2.74. The stron- with albite, aegirineand pectolite).Analysis yields SiO252.31, gest X-ray fines (67 given) are 6.42(47)(2M),5.60(60X210,01l), TiO, 10.9, Fe2O30.29, MnO 0.22, CaO 28.25,Na2O 0.22, K2O 3.336(53X l 3 r,230,03 l ), 3.087(l 00X l l r,212,4t0), 2.802(51)(222). 2.89,LtzO3.25, HrO 1.21,F0.J4, -0 = Fz0.14; sum 99.83% (Si, The structureconsists of a frameworkof Zr[SieOrs]-ain which Ti, Fe, Mn, Ca, Na and K determinedby microprobe,Li by each ring of Si-tetrahedra rests on 6 Zr-octahedra and each flame photometry, H2O by gravimetry and F by specific ion octahedronis bondedto three rings. Along the c-axisis a wide electrode). This gives the formula (Ko esNaoro)osslir oo(Caes+ channelin which half the atomsof K and all the HzO is located. Mns.sa)5eg(Ti1 e6Fefil5),.e5Si12 ooO3s.z8(OH)r ssFo zs), ,u. The formula is thereforedoubled to give Si6O16;the mineralis Single crystal X-ray diffraction shows the mineral to be a dimorphouswith umbite (see below). Kostylevite is colorless, tricfiniccyclosilicate, space group Cl, a = 9.721,b = 16.923,c = transparent,luster vitreous, occurring in crystalselongated on c, 19.9424,a = 91.41",F: 104.t5',y: 89.94",Z:4,D catc.: showingforms {001},{010}, {100}, and {01l}. Twinned on (100). 2.899,meas. 2.91+0.02. (If a standardPl spacegroup is chosen Cleavage(ll0) perfect. H 428-535 kg/sq.mm (- 5 Mohs). = thena 9.763,b=9.721,c= 19.9424,a = t04.15..B=81.76", Opticaffy biaxial,positive,2V = 48', dispersionweak r 1 v, X = "y: 119.92",Z = 2). The strongesrX-ray lines (28 given) are b, Ync = 45",ns (+0.002)a : 1.595,F = 1.598,7= 1.610. 3.48(20)(025,205,203).3.30(20XT35,134). 3.23(t00X006,044), The mineral occurs in alkalic pegmatitein the valley of the 3.06(30tz43,24t), 2.e43(3oXTT4.3T I . I s2). 2.898(30) (T44.T3f,. VuonnemiokRiver, Khibina massif,Kola Peninsula,intergrown 2.730(20X153,T5q,2.417(30)(M8), t.933(40X00.10), t.E4l(25) with umbite and wadeite, and associatedwith eudialyte, K o9{J,462,tet), t .382(25X00. l4). ,and aegirine. The mineral is white with a brilliant bluish white The name is for Ekaterina E. Kostyleva-Labuntsova(1894- (short wave). Its streak is white and its luster is vitreous.The 1974),Soviet mineralogist.Type material is in the Fersman hardness(Mohs) is 3.5-4.0. Katayamaliteoccurs as singlecrys- MineralogicalMuseum, Acad. Sci. USSR (Moscow) and the tals, twins (parallelwith compositionplane (001)-common),or Geol. Museum,Kola Branch, Acad. Sci. USSR, Apatite. M.F. granular aggregates.It has a tabular form with perfect (001) cleavage, in part gently bent. Its optical properties are: o = 1.670,B = 1.671,"y= 1.677,y - a:0.M7,2V(+) = about32", b Munirite* is near ts,Z is about 36" from normal to (001). It exhibits strong K. A. Butt andK. Mahmood(1983) Munirite, naturallyoccurring absorption, weak double refraction and has strong dispersion (r sodium oxide hvdrate. a new mineral. Mineral. > v). The authors mention the coexistenceof an apparent Mag, 41,391-392 polymorph of the mineral with similar properties, this may give someproblems in identification. Munirite is partially dehydrated NaVOr . 2H2O. Chemical In occurrence and properties katayamalite resemblesbarato- analysisby atomic absorption spectrophotometrygave V2O5 vite. Compositionally this mineral differs from baratovite by 67.46,Na2O 22.91 andH2O 10.26(Penfield method), sum 100.63 lacking Zr and by having OH dominant over F. wt.Vo.lt dehydratescompletely at 100'C,the productyielding an The name is for Emeritus Professor Nobuo Katayama, an X-ray diffraction pattern similar to pNaVO3. It is soluble in H2O eminent Japanesemineralogist. Type material is at Yamaguchi and HNOr. University; National Science Museum, Tokyo; and Sakurai It is orthorhombic,a = 10.4330,b = 15.7220,c = 7.480942 : Museum,Tokyo. R.H,L. f 2, D meas.2.43,D calc.2.54.Thestrongest X-ray powder lines (22 reported) are 7.85l ( 100)(020),4.1344(70X21 l), 3.2973(90) (t 4t ), 2.9843('t0)(212\, 2.6847(80X250), l .8200(50X024). Kostylevite* Munirite occurs as pearly white radiating fibrous aggregatesof 2-3 mm crystalson outcropsand wallsof trenchesof the Siwalik A. P. Khomyakov,A. A. Voronkov, L. I. Polezhaeva,and N. N. sandstonein the Bhimberarea of Azad Kashmir, Pakistan.It is Smolyaninova(1983) Kostylevite, KoZr2Si5,O1s . 2H2O, a new opticallybiaxial, negative,2V = 75",a = 1.692, = 1.757,y: mineral.Zapiski Vses. Mineralog. (in B Obshch. l12, 469-474 = = : Russian). t.800;x c, Y a, z b. The name honors Mr. Munir Ahmad Khan, Chairmanof the Ilyushin,G. D., Khomyakov,A. P., Shumyatskaya,N. V., PakistanAtomic Energy Commission.Type materialis deposir Voronkov,A. A., Nevskii,N. N. Ilyukhin,V. V., andBelov, ed with the Hardrock Division,Atomic EnergyMinerals Centre, N. V. (1981)Crystal structure of a new naturalzirconosilicate, Peshawar,Pakistan and the British Museum(Natural History). KaZr2SioOls. 2H2O. Doklady Akad. Nauk SSSR,256, 860- c.A.F. 863(in Russian).

Microprobeanalysis gave SiO242.01,2rO2 23.90, HfO2 0.61, TiO, 2.06,Fe2O3 0.02, K2O22.14, sum90.74Va. Na and Ca were Nefedovite* absent.H2O is present,as shown by stronginfrared absorption A. P. Khomyakov, G. N. Nechelyustov,and G. l. Dorokhova bands at 1680 and 3430 cm-'. The analysis gives K2e3 (1983)Nefedovite, Na5Can(POa)aF,a new mineral. Zapiski (Zrs.g1Tisr2Hfoor)Sir.grOe or K2ZrSi3Oe.The H2O content ls Vses.Mineralog. Obshch., ll2, 479483. given as lH2O to fit the structuralrequirements and to give a calculatedD close to that measured;this however, gives a Analysis by electron microprobegave Na2O 22.7, K2O 0.8, summationof about95%.The mineralis readilydecomposed by CaO 33.7,P2Os 42.1, F - 2.5, sum 101.8- (0 = F, 1.0 : cold l0% HCl. Material heated to 600"Cgave an X-ray pattern l00.E%.This gives the formula basedon ) Na,K,Ca,P = 13of similarto that of wadeite. (NarqoKo'1)Caa62P3 srO'e o,Fnee. The mineralis insolublein NEW MINERAL NAMES Et3 water,but dissolvesreadily with no residueat room temperature USSR(Moscow), and the museumof the Geol. Inst., Acad. Sci. in l0% HCl. USSR,Apatite. X+ay study showsthe mineralto be triclinic, spacegro^up Pl Note-not to be confusedwith Sobolevskite,PdBi. M.F. or PT, unit cell a = 5.401(6),b : 11.647 (8), c : 16.484\7)A, a : 134.99(3f : : , B 90.04(6f, t: 89.96(7)",Z 2. Ir is pseudotetra- Tristramite* gonalwith pseudocella = 11.65,c : 5.404. The strongestlines (45 given) are 3.73 (80b) (211,310), 2.'772(100X321);D. Atkin, I. R. Bashamand J. F. W. Bowles(1983) Tristramite, a 2.703 (7 0)(M2), 2.508(80X4 I I ), 2.290(80X5 I 0), 1.877 (60',t(d22) (te- new calcium uranium phosphateof the rhabdophanegroup. tragonal hkl given). Mineral. Mag, 47, 393-396. The mineral grains occursas irregular from 0.01to 0.5 mm, in Tristramiteis a new memberof the rhabdophanegroup with aggregatesup to 5 mm, and asa fine-grainedreplacement apatite. the idealformula (Ca,Ua*; (PO4)' 1.5-2.0H2O. Electronmicro- It is associatedwith (NazCaPOaF), nacaphite adularia,nephe- probe analysisgave CaO 13.74,UO2 35.08,Fe2O3 5.99, P2O5 line, alkali pegmatitic amphibole,and sphene,and occurs in 25.09,SO3 4.31, sum 84.21wt.%. Wet chemicalanalysis on an segregationsin agpaitic nephelinesyenites of the Khibinskii impure concentrate gave H2O about l5Vo. Effervescesin HCl. massif, Kola peninsula.It is colorless, transparent,vitreous By analogy to rhabdophane,1.46 wt.Vo CO2 was added for lustei,conchoidal fracture. H about4.5. (hydrostat- D 3.01-0.01 chargebalance and 14.33wt.Vo H2O determinedby diference' ic suspension),3.05 calc. Optically uniaxial, positive, ns al = The resulting empirical formula is: (Cas5aUfi*2e 1.571,e = 1.590(both +0.002). . Fe8lr)>,oo[€O+)o 7e (SO4)o.r2(COr)o or]>o ne 1.77H2O. The name is for (1910-1976). Ye. I. Nefedov Samplesare The mineral is hexagonal,a = 6.913(3),c = 6'422\64. preservedin the MineralogicalMuseum, Acad. Sci. USSR, Systematicabsences are consistentwith P6222,the spacegroup Moscow, and the Geol. Inst. Museum,Kola Branch Acad. Sci. of rhabdophane.Z : 3, D meas.3.8-4.2, D calc. 4.18.The USSR,Apatite. D.A.V. strongestX-ray lines (41 reported)are 5.99(40X1010),4.37(40) ( l0Tl ), 2.99(| 00x2020).2.83( l 00x l0T2).2. I4(50x0003.2 | 3 I ) and r .850(50)(2l 32). Acicular to fibrous tristramite crystals from 5 to 80 pm in Sobolevite* length occur intergrown with goethite in fine fractures in pitch- blendeat six mines in Corirwall,the type locality being Wheal A. P. Khomyakov,T. A. Kurova, and N. I. Chistyakova(1983) Trewavas.It is paleyellow to greenishyellow, optically uniaxial, Sobolevite,Na1aCa2MnTi3P4Si4Oj4, a new mineral. Zapiski positive,o = 1.644(2),e = 1.664(2). Vses. Mineralog.Obshch., ll2,456-461 (in Russian). The name is derived from Arthurian mythology. Type material Analysisby electronmicroprobe by N.I.C. of 4 samplesgave is lodgedwith the Institute of GeologicalSciences and British (average)SiO, 17.1,P2O5 19.9, TiO, 15.2,Nb2O_5 4.4, Fe2O3 0.6, Museum(Natural History). C.A,F. MnO 4.0,MgO 0.6,CaO 6.4, NazO 29.7, F 0.7, sum98.6 -(O = Fr) 0.3 : 98.3Vo.Compositions were uniform except for TiO2 and Nb2O5,which varied inversely, TiOr from 15.2 to 13.2, Umbite*, Paraumbite* Nb2O54.2 to S.lVo.This is calculatedto Na,3 a7(Ca16sMg6 21) A. P. Khomyakov,A. A. Voronkov, Yu. S. Kobyashev,and L. (Mno or NarrCaz zqFeor r)(Ti267Nbo 46)P3 e4si4 oo(Og rsFosz) I. Polezhaeva(1983) Umbite and paraumbite,new potassium MnTi3PaSiaO3a,or, by analogyto members other of the lomono- zirconosilicatesfrom the Khibina alkalicmassif. Zapiski Vses. sovite grodp, to Na2CaMnTi3Si4O18. 4Na3POa. The deficit of Mineralog.Obshch., ll2, 461-469(in Russian). Na may be due to its partialleaching; like the others,sobolevite given an alkalinereaction with H2O (leachingof sodium phos- Ilyushin,G. D., Pudovkina,Z.Y.,Voronkov, A. A., andothers phate). Readily decomposedby cold l0% HCl. The infrared (1981)Crystal structure of a new natural modification of spectrumshows SiOa and POagroups. K2ZrSi3Oe' HzO. Doklady Akad. Nauk SSSR257, 622-624. X-ray studyshows sobolevite to be monoclinic,a = 7.074(l),b Umbite = 5.4087(7),c:40.606(9) A pSf.lS', Z:2,D calc.3.00,meas. 3.03. The strongest lines (54 given) are 2.913(50)(213), Analysisof 3 samplesby L.I.P. by electronmicroprobe (H2O 2.896( 1 00X0. 0. t 4), 2.69 1 (7 0)(217 ), r .67 t (s0)(2.0.22)(4t 4\. and F on separate portions) gave (average) SiO2 42.36, ZrO2 Soboleviteoccurs in platy massesup to 5 mm wide, flattened 22.28,}lfoz0.43, TiO, 3.33,FezOr 0. 12, KrO 22.41,Na2O 0.16, on (001). Color brown, luster metallic or pearly on (001), CaOnone, HrO 5.03,F 2.00,sum 98.12-(O : FJ 0.84:97.28%. resinous.Cleavages (001) perfect, (l I0) distinct. H 342-712kgl This correspondsto (Kz 62Na662)(216 77Ti6 r6Hf6 6tFe6 ot) S!, * ' sq.mm (-4.5-5 Mohs). Optically biaxial, negative,dispersion r H2 3sF6a_5Oe e2, or K2(ZrnsTio 2)Si3Oe H2O. The infrared spec- 1 < v strong,2V 25"(red),29'(yellow), 33'(blue), ns (+9.96r, o trum showsbands of molecularH2O at 3170and 3320cm- . The 1.627,B 1.686,71.690, f = b, X : b, XA c 32",pleochroic: X mineralis readilydecomposed by cold l0% HCl,leaving a silica nearlycolorless, Iand Z yellowish-brown,absorption Z = Y > skeleton.In UV light showsa weak yellow-whitephotolumines- X. Doesnot luminescein ultra-vloletlight. cenceat room-temperature,bright whitish-greenat the tempera- The mineraloccurs in alkalicpegmatite of Mt. Alluaiv, N. W. ture of liquid N. The X-ray pattern of material heatedto 500'C is Lovozeromassif, Kola Peninsula,cutting -and cancrin- that of wadeite. ite-syenite.It is intergrownwith lamprophylliteand lomonoso- X-ray study showedumbite to be orthorhombic,space group '7 vite. P2AQI, a : 10.208(2),b -- r3.24t(4),c : .174(1)4.,Z : 4, D The name is for Vladimir S. Sobolev (1908-1982),distin- meas.2.79, ca\c.2.79.The strongestX-ray lines (59 given) are guished Soviet petrologist,former presidentof I.M.A. Type 6.56(6bX020,011)5.91(9Xr0l), 3.31(7)(040,310), 3.02(l0b), materialis at the FersmanMineralogical Museum, Acad. Sci. (231,320,122,04r ), 2.87(8Xl 4 l, 212), 1.797(b\(7 I 7,004,53I ). The El4 NEW MINERAL NAMES structureconsists of wollastonite-likechains (Siz ,,Oq)- with 4 Discussion chainsbonded to one Zr-octahedron. The compositionof the mineral very Umbiteforms platy crystals,flattened on b with principalface is close to that of - free stannodite,and may be subjectto (010),also (l0l), (ll0), and (001).Colorless or yellowish,luster error due to the use of pure elementstandards in microprobe vitreous.H 305-401,av. 381kg/sq.mm (-4.5 Mohs).Optically analysis.The mineral is clearly not isomorphouswith stannite,as its pattern contains biaxialnegative,2V = 80', ns a 1.596,B 1.619(+0.002), p calc. both extra reflectionsand absences pattern = 1.610,X = c, Y = b, cleavages(010) micaceous, (100) less as comparedto the pedect. for stannite.However, the patternis not a goodmatch with that of stannoiditeeither, and more The mineraloccurs with its dimorph kostylevite(see above). detailed analysis may reveal that it is a polymorphof stannodite. The name is for Lake Umba, Kola Peninsula.20 km from the On the other hand,recent work locality. on stanniteand relatedminerals has cast considerabledoubt on the existenceof naturalisomorDhous series based on the stannite structure.S.A.K. Paraumbite

Paraumbiteoccurs in alkalic pegmatiteof Mt. Eveslogchorr, UnnamedFe3+ analogue of hematolite easternKhibina massif,with K feldsparand eudialyte,the latter (1983) partly replacedby wadeite,gaidonnayite, and paraumbite.Mi- P. J. Dunn and D. R. Peacor A ferric iron equivalentof hematolite croprobeanalysis gave SiO2 39.58, KrO 15.39,Na2O 0.12, CaO from Sterling Hill, New Jersey and LAngban, Sweden.Mineralogical Magazine, none,2rO227.87 , HfO2 0.32, TiO2 0.89, Fe2O3 0.10, HrO (diff.) 47, 3El-385. 15.73%,corresponding to (K2 e8Fe]*osAlo e2Na663)(2rz ozHfo o,Tio ,nFeo o,) The empirical formula (Mnse6Mg3 ou):,soo . . Hoe4sis esOrs oo 7.34H2O,or K.ZrrH(Si3Oe)2 nH2O. HzO by (AsOr)r61(AsOa)2 or(OH)z:.ou calculated from K. Johanssen's : differencecorresponds to n 7, but the calculateddensity analysisin Wickman (1950)is in good agreementwith six new : correspondsto n 3. The mineralis readilydecomposed by cold electronmicroprobe analyses ofLingban specimens.Two analy- l0VoHCl. ses of specimensfrom the Sterling Mine, Ogdensberg,New X-ray study shows the mineral to be orthorhombic, a : Jerseyare also reported. = = : 10.34+0.04,b t3.29t0.05,c t4.55+0.064,2 4, G. 2.59. The mineralis hexagonalwith a : 8.284. The c parameteris The strongestX-ray lines (52 given) are 6.46(8X012), uncertaindue to a mixed layer structure. Intense diffractions 5.95(l0bx02t,l02),3.34(7)(230,301,310), 3.01(9bx042,321), define lattices with c = 48.46 and c : 72.694 which are 2.90(7)(2t4,1 4D, 2.56(6X I 50,332). approximatelyintegral multiples of the basic 12.2A unit of Paraumbiteis colorlessto white, luster vitreousto pearly on hematolite.The strongestlines in the unindexedX-ray powder cleavageplanes. Cleavages (010) micaceous, (t00) less perfect. pattern (22 reported)are 6.09(80),5.13(50), 4.t0(50), 3.42(50), H 280-504,av. 384 kg/sq.mm (-4.5 Mohs). Optically biaxial 2.400(100),t.563fl 00). c.A.F. negative,2V = 82",ns (+0.002)c 1.588,B 1.601,y 1.610,X = c, Y: b. The nameis for the closestructural similarity to umbite,with a NEW DATA and b nearly idential,c twice that of umbite. Type materialof both mineralsare at the FersmanMineralogi- ,Rancieite, and Takanelite cal Museum,Acad. Sci. USSR(Moscow) and the museumof the S. J. Kim (1980)Birnessite and rancieiteproblem: their crystal Geol.Inst., Kola BranchAcad. Sci. USSR(Apatit). M.F. chemistry and new classification.Journal of the Geological Societyof Korea, 16, 105-l13. Chemical and X-ray diffraction analysesand crystal chemical UnnamedCu3FeSnS5 considerationshave clarified the differencesbetween birnessite and rancieiteand their relationshipto takanelite.Both birnessite A. M. Podol'skii,E. G. Ryabeva,and L. S. Dubakina(1982) A and rancieitewere found to be solid solution series,displaying newvariety ofrose stannite. Doklady Akad. Nauk SSSR,264, 182-187(in Russian). variable compositions,cell dimensionsand X-ray difraction patterns.The generalformula for both seriesmay be expressed A rose-coloredmineral of compositionCu 37.5, Fe 10.6,Sn as (R)z-z*Mn1+.O"(OH),.nH2O. For the rancieiteseries, R 22.6,S 29.2,Zn none;sum 99.9 corresponding to Cu3FeSnS5was representsCa or Mn2*, with n -3, while the birnessiteseries found in low-temperatureveins associatedwith stannite,l6llin- consistsof Ca-, Mn2+, and Na-end members,with n <1.5. gite, nativeBi, pyrrhotite,chalcopyrite, and pyrite. The mineral Although "takanelite" Icharacterized as (Mn2*,Ca)MnX* occurswithin stanniteas elongatespindle-shape grains from a Oe . nH2O,with n : 1.3,by Nambuand Tanida (1971) J. Japan few to 40-60pm. The mineral displays strong reflectionpleo- Assoc.Min. Petr. Econ. Geol.,46,48-561should be the same chroism and is strongly anisotropic. VHN 50g = 265, and mineralas the Mn2*-analogueof rancieite,their crystalchemical bireflectanceis distinct(nn,%o) with 460,22.1,21.0;540,26.7, properties and X-ray diffraction patterns do not agree. It is 25.4;580, 28.5,27.5; e0, 30.4,29.6. The strongestX-ray lines suggestedthat takanelite may be a member of a more hydrated (18 given) are 3.053(10)(ll2), 1.897(9) unindexed, series, or it may not be a valid species. (One sample of 1.628(7)(t r6,033), 1 .245(8X I 43, I 36), t. t00(7)(244),I .086(7X228), "takanelite" proved to be rancieite admixed with and basedon a stannitestructure. The mineral is believedto have .) It is also proposed that rancieite and birnessitebe formedas part ofan isomorphousseries with stanniteby addition classifiedas mineral groups, and that Ca-rancieite,Mn2*-ran- of a moleculeof CurS to Cu2FeSnSa.The authorspropose that cieite,Ca-birnessite, Mn2*-birnessite, and Na-birnessitebe rec- membersof the isomorphousseries be calledcovellostannite. ognizedas separateend-member species. J.A.Z. NEW MINERAL NAMES El5

Discussion ionsto completea distortedoctahedral (4 + 2) coordination.The oxide ions and vacanciesare distributed over the 32(0 sites The proposed nomenclature should be formally presentedto (oxygenoccupancy 0.94) and the halideions occupy statistically the Commission on New Minerals and Mineral Names for approval.P.J.D. the 4(b) sites.Thus the unit cell contentsmay be describedas PbaCu2aO3e!2(Cl,Br)+.R.A.L,

Georgiadesite R. C. Rouseand P. J. Dunn (19E3)New data on georgiadesite. Vashegyite Mineral. Mag-, 47, 219-220. Z. Johan,E. Slansky, and P. Povondra (1983)Vashegyite, a The chemical formula and crystallographicdata for georgiade- sheetaluminum phosphate: new data.Can. Mineral., 2l , 489- site havebeen revised upon re-examinationof the holotypeand 498. three newly discoveredspecimens from the type locality. Elec- Examinationof vashegyitefrom the type locality and two tron microprobeanalysis gave PbO 81.3,As2O5 11.2, Cl 11.3, other occurrencesshows it to be an orthorhombicsheet phos- - : = sum 103.8 (0 Clr; 161.t wt.Vo.The revised formulae, phate with variable properties. At Vashegy (Zeleznik), Czecho- Pb15,(AsOa)aCll+Oz(OH)z or Pb,u(AsOa)aCl Ia(OH)o, are more con- slovakia, it occurs as white polycrystalline aggregatesassociated sistentwith the redetermineddensity (6.3+0.3glcm3) and space with varisciteand limonite. Wet chemicalanalysis gave Al2O. group. 29.11,P2O5 33.44, H2O 37.45, sum 100.0%,corresponding to Georgiadesite : = is monoclinic, P2/c, a 13.803(10),b AIroe5E(PO4)e o4z(OH)s zqa - 37.02H2O(on the basis of 20(Al + : = 7.910(2),c 10.812(4)A,F 102.68(3).with strongestlines (53 Fe + P)). Ideal formula Alr(PO4)e(OH)o. 37-38HzO.X-ray given): 3.096(I 00X302,4| 0), 3.955(50XI I 2,020), 3. 164(50\(022), study yieldedcell dimensionsof a : 10.773(3),b = 14.971(5\,c 6.33(30X01| ), 5.30(30X102,002),4.03 t\30)(212). tt occurs with :20.6266)4, V = 3326.6N,Z = 2, D. catc. 1.934,meas. nealite,laurionite, and phosgenitein cavitiesin the ancientslags 1.930(l). StrongestX-ray lines (20 given) are 10.3(100)(002), at Laurion. Attike. Greece.C.A.F. 7.49(90)(020), 7.04(90X02 I ), 2.9| 9(90)(330),3.455(50X232), and 2.4r7(s0)(062). Vashegyitefrom Chvaletice,Czechoslovakia occurs as hemi- Fedorite sphericaggregates of pale greenishwhite crystalsthat possess perfect G. V. Sokolova,A. A. Kashaev,V. A. Drits,and V. V. Ilyukhin basafcleavage. Wet chemicalanalysis gave A12O127.09, (19E3)The crystal structureof fedorite. Sov. Phys. Crystal- Fe2O30.12, P2Os 31.83, H2O 40.01,insol. 0.50, sum 99.55Vo, logr., 2E,95-96. correspondingto (Al5e56Fefi|rrXPOo)s ozz(OH)z s1s. 2i.4i H2O (on the basis of I I (Al + Fe + P)). Ideal formula The layer calcium sodiumsilicate, fedorite, named for acade- AI5(PO4)5(OH)3'23H2O.Cell dimensionsc = 10.754(3),b = :9.676(2), micianE. S. Fedorov,is triclinic, spacegroup CT, a 14.971(5),c : 22.6756)4, y : 3650.64''.space group Pnam or = = : b t6.706(l),c 13.231(2)Aro 93.35,B: 1t4.96,y:90.03.; Pna21,Z = 4, D. calc. 2.005, meas. 1.994(2).Strongest X-ray = = Z 2:D meas. 2.43 glcm3.Combined chemical and structural lines(22 given)are l l.3(100)(002),2.9 1 2(90)(330), 7.50(80X020), analyses indicate the following idealized formula: (K, o. 6.26(70)(022), 3.297 (60)(3 l2), and 5.3 85(40X200). O ptically biaxi- Na6 . s3)2as(Caa.52Na2 as)7.sSi16O38(OH,F)2 H2O. Least squares al negative,colorless, a : 1.470(8),B: 1.4'77(2),y = 1.a82Q), refinement of the structure (2500 reflections, anisotropic R : 2V : 74+5",X : c, Y = b, Z : a, axialplane parallel to (010). 0.095)located the interlayeroctahedral carions (Na,K) and the The DTA curve shows an endothermicfeature between 140 of the water moleculeswithin the silicate framework, and 190'C(dehydration) and an exothermicfeature at 860'C(loss twolayer networks of six-memberedsilicate tetrahedralrines. of OH and structural rearrangement).lnfrared absorption spec- J.A.Z. tra resemblethose of variscite. Differencesin cell dimensions and physical properties due to variations in water content and crystalstructure (in particularstacking sequence). A polytypoid Murdochite relationshipbetween several apparent varieties is suggested. E. Dubler, A. Vedani and H. R. Oswald (1983)New srrucrure J.E.S. determinationof murdochite, CuoPbOs.Acta Cryst., C39, ll43-l|46.

Crystal structure analysisof murdochitefrom Hansonburg, New Mexico indicatethat the formulamay bestbe describedas DISCREDITED MINERALS CuoPbO6-*(Cl,Br)2*with x < 0.5 instead of Cu6pbOsor = Cu6=*Pb'=*(O,Cl,Br),as proposedpreviously. The crystalstud- Badenite,Epigenite mixtures ied is cubic,Fm3m, a :9.224(2)A,Z = 4,finat R = 0.027for 255 Bayliss, P. (1983) uniqueobserved reflections. Commentson the validity of badeniteand epigenite.Mineral. Mag., 47 4ll-412. There are several differencesbetween this structure and that , reportedpreviously (Christ and Clark, 1955).The structureis not Electron microprobe and X-ray powder diffraction analysisof sodiumchloride type basedwith a statisticalarrangement of Cu the only availablespecimens (not type)ofbadenite and epigenite andvacancies. The Pb ionslie on the 4(aX0,0,0)special positions showedboth to be mixtures.Badenite : bismuth+ saffiorite+ and are cubicallycoordinated by eightoxygens. The Cu ions are modderite.Epigenite = tennantite+ chalcopyrite+ pyrite. Both alsoon specialpositions (24(d), (t/4,%,0)). The Cu*2 ions havea have been discreditedas species by the IMA Commission. squareplanar coordinationby four oxygensplus two halogen c.A.F.

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