American Mineralogist, Volume74, pages 1399-1404, 1989

NEW MINERAL NAMES*

JonN L. Jamnon CANMET, 555 Booth Street,Ottawa, Ontario KIA OGl, Canada EnNsr A. J. Bunxe Instituut voor Aardwetenschappen,Vrije Universiteite, De Boelelaan 1085, l08l HV, Amsterdam, Netherlands

Blatteritex 814-940 (average877). In reflectedlight, slightly to mod- eratelybireflectant, nonpleochroic; variation in color (buff G. Raade,M.H. Mladeck, V.K. Din, A.J. Criddle, C.J. weak to Stanley(1988) Blatterite, a new Sb-bearingMn2+-Mn3+ to pale bufl) is due to bireflectance.Anisotropy member of the pinakiolite group, from Nordmark, distinct, with rotation tints in shadesof grayish-brown. Sweden.Neues Jahrb. Mineral. Mon., l2l-136. No twinning. Orange-redinternal reflections.Reflectance data aregiven at intervals of l0 nm from 400 to 700 nm The empirical formula was calculatedfrom an analysis in air and oil. Reflectanceis about 110/oin air. X, Y, and rce of 2.53 mg of hand-picked by emissionspectrometry Z axescorrespond to a, c, and Daxes, with the optic plane fragments.Recalculation to conform with the gen- crystal parallel to (001). The sign ofbireflectance in air changes eral formula of the pinakiolite group yielded a MnO- from positive (400-450 nm) to negative (470-700 nm). MnrO, distribution, confirmed by a wet-chemical analy- The sign of birefringenceis positive from 400 to 520 nm, sis on 960 pg of material.The result is MgO 13.0,FerO, and negative from 520 to 700 nm. Dispersion r < v. 3.48,MnO 35.1,MnrOr 22.2,SbrO3 11.4, B2O3 14.4,to- Color valuesare also given. Calculation of the Gladstone- tal 99.58 wt0/0.The valency state of Sb is extensivelydis- Dale relationshipswith Sb3* and Sb5+in the analysisled cussedtGladstone-Dale calculations indicate that a for- - to a compatibility index ll (Kp/KJl of, respectively, mula with Sb3* is more acceptablethan one with Sb5*. 0.019 and -0.071 ("superior" and "fair"). The empirical formula of blatterite then is (Mn?j,,- The name is for the German collector Dipl.-Ing. Fritz Mgo (Mn3irrSb8ln, Fe;.io, )- nru(B, 0,.O. ) O r. Sin- rno)r, oo, Blatter (1943- ) who first recognizedthe mineral and pro- gle-crystal and powder-diffraction methods revealed an vided the material described.Type material is deposited orthorhombic unit cell, spacegroup Pnnm or Pnn2, wilh at the Mineralogical-GeologicalMuseum of Oslo, and as a : 37.693(6),b : 12.620(2),c : 6.2541(8)A, Z : 32, specimenBM 1986, l12;E.ll68 in the British Museum D"r": 4.35, D-*. : 4.7(0.4)g,/cm3. The strongestX-ray (Natural History). E.A.J.B. diffraction lines (38 listed) are 5.243(45)(420), 2.2720 6(40)(47 0), 2.6207 (3 5)(840), 2. 604 7( l 00X802), 2.s200(30)(9 40), 2. 08 94(40)(1 2.2.2), I .5 6 3 8(3 5X004), and 1.5406(30X472).The mineral is a member of the pinak- Brokenhillite iolite group. Orthorhombic structures in this group are M. Czank (1987) Structure determination and unrEv in- derived from the pinakiolite structure by chemical twin- vestigation of a new pyrosmalite-group mineral. Col- ning. Blatterite has an a dimension of 37.7 A correspond- lected Abstracts, Fourteenth International Congressof Crystallography(Perth, Australia, C-l 55). ing to the structure type 8l8l . . . , 4s was confirmed by a preliminary nnreu study. Electron-microprobe analysis [data not given] of crys- Blatterite occurs sporadically in piecesof rich manga- tals from Broken Hill, New South Wales, Australia, gave nosite in the Kittelgruvan mine of the Nordmark orefield, a composition of (MnorrFerooMo.lstro o6)[Si6.oor4 88(OH)0.r2]- Viirmland, Sweden. This material, however, has been (OH)7recl2Er based on 6 Si and divalent Mn and Fe. The dumped there from elsewhere;the Brattforsgruvan mine structural refinement suggeststhat the formula is (Mn, in the same orefield is the most probable source.Blatter- Fe)rr[SiroO.o](OH)2eC1,,.The mineral is hexagonal,space ite occurs as lath-shaped crystals, up to 5 mm long, in groupP6rmc, a: 13.481,c : 14.084A. maganositeor calcite; associatedminerals are katoptrite, Discussion.An unapproved name that should not have pyrochroite, rom6ite(?), and hausmannite. Blatterite beenused. J.L.J. prisms are elongateand striated [001] and have flat, dia- mond-shapedcross-sections. The prism form is {ll0}, with interfacial anglesof 37" and I 43". Color black, streak Cetineite* brown, luster metallic to submetallic,brittle, perfect {001} (1987) a new antimony cleavage,imperfect {100} parting,H about 6, VHNlso: C. Sabelli,G. Vezzalini Cetineite, oxide-sulfidemineral from Cetine mine, Tuscany,Italy. Neues Jahrb. Mineral. Mon., 419425. * Beforepublication, minerals marked with an asteriskwere approvedby the commissionon New Minerals Tuftsoforange-redacicularcrystals,elongate[001]and Na-es, InternationalMineralogical Association. ""iMi";;;i up to 15 mm in length and 15 pm in diameter, occur in 0003-o04x/89/ll 12-1399$02.00 1399 1400 NEW MINERAL NAMES

slagcavities in the dumps of the Cetine antimony deposit, elongation,a : 2.45,0 : 2.50,y : 2.65,2Vz : 65(3)' 20 km southwest of Siena, Tuscany, Italy. Electron-mi- (589nm),Z n a:25o,X A c:21o, distinctdispersion croprobeanalyses, combined with a crystal-structurestudy, r < v. Crystal-structure study showed the mineral to be gaveKrO 6.66,NarO 3.87,SbrO3 81.06, S 7.15,SiO, 0.67, monoclinic, spacegroup P2t; for material fromZod, a: HrO (by difference)4.16, sum 103.57,less O = S 3.57 19.00(3),b:7.982(9), c:6.938(\ A, B: 95.67(llf, wt0/0,corresponding to (K,.rrNa, 57),'35(SbrO3)3 03(SbS3)o.eo- and the diffractometer powder pattern (Co radiation) has (OH).53.2.64HrObased on 7 Sb atoms and omitting Si. the following strongestlines : 3.29(l 00)(221), 3.I 5(94X600), The simplified formula (with x : 0.5 and K:Na : 1.86: 3.| 4(t 00)(202),2.7 28(48)(42r), 2.002(42X8 2 l ), l .9 9 8 (4 s) 1.64)is (K,Na)r*,(Sb,O3)3(SbS3XOH)".(2.8-x)H,O. Or- (023), I .686(32)(640), and I .683(29)(242).The resultsare ange streak, resinous luster, transparent to translucent, in good agreementwith data for synthetic BirTeoO',. {100} cleavage,VHNro : 127-156,nonfluorescent, op- The new name is for ProfessorS. K. Chekhovich of the tically uniaxial positive, weakly pleochroic from orange Polytechnical Institute of AIma-Ata, KazakchskayaSSR. to slightly orange-brown,refractive indices much greater Type specimensof the mineral are in the Fersman Min- than 1.74. Single-crystalX-ray study indicated hexagonal eralogicalMuseum, Moscow. J.L.J. symmetry, spacegroup P6.; cell dimensions refined from the powder pattern (diffractometer,Co radiation) are a : 14.230(2),c: 5.579(l)L; D"u": 4.21g/cm3 for the em- Chernikovite* pirical forinula and Z : 2. Strongestlines of the powder D. Atencio (1988) Chernikovite, a new mineral name for patternare 12.41(80)(100),4.67(54X120), 4. I l(55X300), (H3O)r(UOr)r(POo)r'6HrOsuperseding "hydrogen au- 3.5 8 l (44Xl 2 l ), 3.4 19(42\1 30), 3. 00q7 4X22 t), 2.9| 6(100) tunite." Mineral. Record. 19. 249-252. (131),and 2.69q61)(410).The infraredspectrum has ab- This note is a compilation of data publishedin 1958, sorptionbands at 3400 and 1630 cm-', possiblyindica- 1971, and 1979 in rather inaccessiblesources on three tive ofstructural water; strong absorptionspresent in the occurrencesof a mineral that had been given the mis- 450-600 cm-'region reflectthe presenceofSb-O bonds. leading name "hydrogen autunite" after synthetic mate- The new name is after the locality. The mineral was rial of the same properties and that now is to be called formed by weathering of rock and slag that were accu- chernikovite. Chemical data are listed for synthetic ma- mulated during mining operationsat the beginningof this terial [Ross,Am. Mineral., 40, 917-919 (1955)]:UO, century.Type specimensare in the Museo di Mineralogia, 65.08,P2O5 16.03, HrO 19.33,total 100.44wto/0, consis- Universitir di Firenze, Italy, and the Smithsonian Insti- tent with the ideal formula (H3O)r(UOr)r(PO4)r.6HrO.Of tution, Washington,D.C. the total water of hydration, 9.28 wto/ois lost at I l0 'C. Discussion.The crystal structure was reported in Am. Only spectrographicdata are available for natural mate- Mineral., 73, 398-404, I 988. J.L.J. rial. X-ray powder-diffraction data can be indexed on a tetragonal unit cell, probable spacegroup P4/nmm, btt possibly also P4/ncc or P4r22. Cell parameters of type Chekhovichite* material of Chernikov ( I 9 58) on the basisof P4/nmm are E.M. Spiridonov, I.V. Petrova,L.A. Demina, V.I. Dol- a: 7.030(6),c : 9.034(8)A,z: l, D^.: 3.258e/cm3. gikh, (1987) G.M. Antonyan VestnikMosk. Univ., Geol., The strongest X-ray diffraction lines (41 listed) are 42(6), 7 l-7 6 (English translation of Russian). 5.5l (90X10l), 4.99(l00Xll0), 3.82(80)(l02), 3.54(100) The mineral occurs in fractures in quartz and chalce- (200),3.26 (r00x20 l ), 2.96 (60) (2r I ), 2.I 6(70) (I 04,2r 3, dony in oxidized ores from former mines at Zod (Ar- 222,311),and 2.09(70)(302).The pattern of chernikovite menia) and atZhana-Tyube and North Aksu (North Ka- has a strongreflection at about 9 A, betweenthe 002 peak zakhstan).Electron-microprobe analysesfor the mineral of autunite and the 001 peak of meta-autunite: when the from the respectivelocalities gave Bi 37.2,35.3,36.6;Pb three minerals occur together, identification is easy.The 0.8,0.3,1.4; Sbtr., l.6,tr.; Fe0. 1,tr.,0. 1;Cutr.,tr.,0.1; mineral is probably isostructural with meta-ankoleite, Te 46.3,46.5,46.1;O 16.0,15.5, 16.0; sum 100.4,99.2, uramphite, and abernathyite.Tlpe chernikovite (no exact 100.3 wto/o;the first analysis correspondsto (Bi,,u- locationgiven) occurs as thin, transparent,micalike plates, PboooFeo.or)", orTe, ,rO,o ,, basedon I 7 atoms,and the oth- elongate [010], cleavagesperfect {001} and imperfect ers are similar to it. The mineral, which is synthesized {100}, color pale yellow, luster vitreous, ultraviolet flu- easily, occurs as crusts on quartz, as small pockets in orescenceintense yellow-green. H not indicated. Optically limonite, and as pseudomorphs after tellurobismuthite. uniaxial negative,e : 1.569, co : l. 58 3. Brazllian material Aggregatesare up to 5 mm across;individual grains are (Camargo, l97l) is optically lemon-greenand slightly up to 0.1 mm in size.Color grayishin shadesof yellow, pleochroic; it occurs with other secondaryuranium min- white, or green, streak white, luster adamantine, semi- erals at Perus (Sao Paulo) as oriented inclusions in au- transparent, H : 4, perfect cleavage(and polysynthetic tunite and meta-autunite,which line fracturesin granites twinning) parallel to the elongation ofplaty grains, and a and granitic pegmatites. Calculation of the Gladstone- secondperfect cleavage at 87'to it, D.*" : 6.88(15),D*," Dale relationships with the ideal formula, the calculated :7.002g/cm3 (Zod)withZ: 4. Opticallybiaxial, negative density, and the recorded refractive indices of the type NEW MINERALNAMES 1401 material lead to a compatibility index [ - (K"/K.)] of specimensare in the Museum of Victoria and the South -0.0536, "good." AustralianMuseum. J.L.J. The proposal to discard the name "hydrogen autunite" has been made becausethe mineral contains (HrO)* ions and not simply H*, becausethe degreeof hydration is not Unnamed Tl sulfide that of an autunite-group mineral, and becausethe term A. El Goresy, M.K. Pavicevic (1988) A new thallium "hydrogen autunite" has been used for other natural and mineral in the Alshar deposit in Yugoslavia.Naturwiss., artificial compounds.The name honors Dr. A. A. Cher- 75 17-?q nikov of the Institute of Mineralogy, Geochemistry and Dump samplesfrom the Crven Dol mine in the Alshar Crystallochemistry of Rare Elements (IMGRE) of the thallium deposit, Kozuf metallogenicprovince, Yugosla- Academyof Sciences,Moscow, USSR, who describedthe via,, contain rcalgar,orpiment, lorandite, arsenic-bearing first natural occurrence(1958). A specimenof the type pyrite and marcasite,and an unnamed mineral for which material is deposited in the Fersman Mineralogical Mu- electron-microprobeanalyses gave Tl 72.9,Fe <0.05,2n seum in Moscow. 0.14,Cu 0.16,Ni 0.09,As 9.40,Sb 0.22,515.8,sum Discussion.It is to be regrettedthat a number of easily 98,7| wto/o,correspondingto Tlr.roZnooruCu" oroNio o,uAs, oro- obtainable data, e.g., chemistry and single-crystalmea- Sboo,6sooo,ideally TlrAsSo.The mineral is pale gray in surements, have not been newly acquired on the type reflectedlight and hasyellow internal reflectionand slight- material.E.A.J.B. ly lower reflectivity than orpiment. Occurs as thin rinds on lorandite, realgar,and orpiment. Known as a synthetic phase.J.L.J. Sieleckiite* W.D. Birch, A. Pring (1988) Sieleckiite,a new copper Pb-Bi-Hg-Cu sulfosalts aluminum phosphatefrom Mt [sic] Oxide, Queensland, Australia.Mineral. Mag., 52, 515-518. E.E. Foord, D.R. Shaw,N.M. Conklin (1988)Coexisting galena,PbS," and sulfosalts:Evidence for multiple epi- Electron-microprobe gave analysis CuO 32.39, Al2O3 sodes of mineralization in the Round Mountain and 26.51, PrOs19.42, H2O (CHN analyzer)18.6, CO2 1.6, Manhattan gold districts, Nevada. Can. Mineral, 26, sum 98.1wt0/0, conesponding to Cu, ,,Al rdPOo),o(OH),r. J))-J /O. l. 7HrO,ideally CurAlo(POo)r(OH)r,.2HrO assumingCO, prospect, gold is an impurity. The mineral occursas slightly translucent At the Outlaw Round Mountain district, qtafiz rare Pb-Bi-Ag-Cu spheres,up to 0.5 mm in diameter,with a smooth outer Nevada, a vein contains several which unidentified. PhaseX, present surface and a finely fibrous radiating structure made up sulfosalts,two of are in reflec- of crystals20-100 pm long and l-2 pmin diameter. Color as veinlets that cut aikinite, is similar color and to aikinite. Electron-microprobe analyses of five deepsky-blue to royal blue, streakpale blus, D-*. : 3.02(2) tivity grainsgave L3, 1 I 5.9, Pb g/cm3by suspension,D,^" : 2.94 g/cm3for the ideal for- an averageof Cu Sb 0. , S 31.2, Mo l, H98.2, Te 0.1,sum 100.6wt0/0, mula and Z : 1. No cleavage,twinning, or fluorescence; Bi 40.6,Ag 3.1, 0. (Hgr subconchoidalfracture and H : 3 for the aggregates.Re- corresponding to rrAB,ooCu, o5Pbo.32)"s.ooPb, o(Bi,o r,- simplified as (Hg,Ag,Cu,Pb)5Pbt- fractive indicesare between 1.63 and 1.66,length slow, MooouPbo orSbo.or)r,o.roSrr, BirS27. It is that single-crystalstudies will be weakly pleochroic from colorlessto pale blue. Electron- concluded whether mineral is new diffraction data and refinementof the Guinier X-ray pow- necessaryto determine the a species,possibly a Hg-substituted heyrovskyite or eski- der pattern (Cu radiation) gave triclinic symmetry, a : moite, or a new member of the lillianite series. 9.41(8),b:7.56(5), c: 5.95(6)A, o: 90.25(12),P: Phase Y, which forms the bulk of an areaabout 200 by 91.27(12),t : 104.02(7)".Strongest lines of the powder pm, phaseX, patternare 9.120(50X100), 5.036(100X101), 3.852(100) 200 contains lathlike intergrowths of blebs and irregular massesofgalena, and coloradoite.Two elec- (rrr), 3.276(30)(220), 2.827(s0)(T02, 102), and 2.460(50) (32r). tron-microprobeanalyses gave Sb 0.02, 0.03, Te 0.04, Hg 10.13, 15.40,15.42,Pb The mineral occurs at the dormant Mt. Oxide copper 0.07,Cu 1.60,1.61, 9.14,S 35.04, 34.7 l, Bi 36.79, 36.95, Ag 2.59,2.43,sums I 0 1.6l, mine, 150 km north of Mt. Isa, Queensland,Australia, mineral may Hg- and Cu-substi- where oxidation of a massive pyrite body containing mi- 100.37 wto/0.The be a but single-crystalX-ray studies are nec- nor chalcopyrite and chalcocite led to enrichment in su- tuted ourayite, mineral. pergenechalcocite accompanied by malachite, brochant- essaryto characterizethe J.L.J. ite, and lesser amounts of cuprite, tenorite, azuite, atacamite, turquoise, and libethenite. The new mineral was collectedby geologistRobert Sielecki,for whom it is Unnarned mineral of the crichtonite group named, from a narrow fracture in a boulder in the open H.A. Stalder,Ch. Biihler (1987) Geochemistryof crich- pit; associatedminerals are well-crystallizedvariscite, tur- tonite group minerals from Alpine fissures. Schweiz. quoise, libethenite, and minor pseudomalachite. Type Mineral. Petrogr. Mitt., 67, 93-102 (in German). r402 NEW MINERAL NAMES

Electron-microprobeanalyses gave TiO, 50.48-51.12, The mineral probably fulfills the requirementsfor being FerO, 27.90-29.41,Al2O3 0. l8-0.21, VrOs 0.95-1.06, consideredas a new species,but no proposal has been put MnO 1.02-1.13,ZnO1.09-1.20, AsrO, 0.66-1.07, Nb2O3 forward to the IMA Commission on New Minerals. The 1.22-1.87,SnOr 0.31-0.88, YrO3 l.L2-1.53, CaO 0.08- authors have stated that future investigations will eluci- 0.10,SrO 0.21-O.31,BaO 0-0.16,PbO 3.91-4.56,UO2 date the most complex chemical and structural variations 6.06-7.82, ThO, 0-O.04,sum 98.15-99.26wto/o,leading and their interrelationships within the pinakiolite group: to an average empirical formula [UoorPborr(Sr,Ca,Ba,- this will result in a later need for revision of the nomen- Th)oorl"or,[Ti,rrn Fel[n Fe]j" (Mn, Zn, Nb, Y, V, As, Al, clature of the pinakiolite minerals. Sn),,r]rro rrOrr. X-ray powder and single-crystalmethods Discussion.This decision of the authors is to be highly show the mineral to belong to the crichtonite group with esteemedby the professionalcommunity. E.A.J.B. a : 10.456(3),c : 2l .098(0 A. The mineral,provisionally designatedas a REE-free davidite, occurs on the Pizzo Cervandone,Alpe Devero, Italy, as crystals up to 2 mm Unnamed Mn analogueof gordonite in diameterin fissuresin gneiss,associated with dark smoky P.B. Leavens,A.L. Rheingold (1988) Crystal structures quarlz, rutile, chernovite, and hematite. The dominant of gordonite, MgAlr(PO4)r(OH)r(HrO)6'2HrO,and its gives crystal form is a rhombohedron, which the crystals Mn analog.Neues Jahrb. Mineral. Mon.,265-270. an isometric appearance.E.A.J.B. Electron-microprobe analysis (not given) of a mineral in specimenNMNH 162695from the National Museum Unnamed mineral of the pinakiolite group of Natural History, Smithsonian Institution, Washington, (1988) D.C., gavethe composition (Mno73Fe0 rrMg oo)Al,or(POo)r- S. Hansen,U. Hf,lenius,B. Lindqvist Antimony- .2HrO, rich pinakiolite from Ldngban,Sweden: a new structural (OH)r(HrO)6 with the water inferred from the variety. NeuesJahrb. Mineral. Mon.,23l-239. structuralanalysis. The mineral is colorless,triclinic, space groupPl, a: 5.257(3),b : 10.363(4),c : 7.040(3)A, a Electron-microprobe analysis and rcp emission spec- : 105.44(3),P : 113.07(3),y : 78.69(4)',Z : 2. The pinak- trography (for B) with subsequentrecalculation to mineral is the Mn analogueof gordonite and is isostruc- iolite stoichiometry gave (averageof 16 measurements) tural with paravauxite and laueite. J.L.J. MgO32.02,MnO 7.81,MnrO.26.48, SbrO3 16.30, FerO, 0.06,AlrO j 0.22,8 203 l 5.74, total 98. 6 5 wt0/0,consistent with a formula (Mgr.oMn?iXMnlgAloooSb?gXBOr)0.The Unnamed arsenate Sb has been assumedto be trivalent becauseit is in better accordancewith the measured B content and also gives A.C. Roberts,P.J. Dunn (1988)Mineralogical data for a rise to a striking stoichiometry, suggestingordered sites new, unnamed arsenatefrom the LAngbanMine, Viirm- land, Sweden.Geol. Fdren. Stockholm Fdrh., I10, l8l- for Sb and Mn2+. X-ray diffraction studiesshow the min- r82. eral to be monoclinic, possible spacegroups Pa or P2/a wirha: 21.808(4),b:6.162(l), c: 5.331(l)A, B: On a seam surface of magnetite-calciteore from the 94.73,2:2; neitherD nor the strongestX-ray difraction Iltngban mine, Sweden,are very thin, irregularly shaped lines are given. Electron-diffraction and lattice imagesin- patches of a dark reddish-brown, almost black mineral dicate that the structure of the mineral is derived from consistingof platy crystalshaving {100} dominant. The pinakiolite by a structural mechanism operating on the mineral, which is intimately associatedwith pyroaurite, (100) plane instead of the well-known (201) chemical has a vitreous to resinousluster, perfect {100} cleavage, twinning of other pinakiolite-group minerals. Structural H : 3 to 4, D^u": 3.6(3)g/cm3 by suspension.Soluble complexities are indicated by diffuse scatteringeffects in in l: I HCl, nonfluorescentin ultraviolet light. Electron- all three directions and satellite reflections in one direc- microprobeanalysis gave FerO, 9.4, MgO l3.2,ZnO 5.0, tion. The mineral occursas flaky crystals,rarely to I mm CuO 0.4, MnO 35.3, AsrOr22.l, HrO (by difference)14.6 in size, in a hausmannite-impregnatedcalcite-dolomite wt0/0,corresponding to Mnu *(Mgr,Zno uoCuoor)"r.ruFe?.fu- rock as a fissurefilling. Associatedminerals are mangan- As, rnOrru(OH),r rr, ideally MnrMgoFe3+(AsOo)r(OH),r; berzeliite, Ba-bearinghedyphane, and manganoanphlog- "wiihZ: 6 and the idealformula, Dur":3.53 g/cm3.Poor- opite. Color variable from light olive-greento yellowish- quality single-crystal photographs indicate monoclinic brown and bronzelike, streak yellowish-gray,translucent symmetry,pseudohexagonal, space group A2/aor Aa;cell to semimetallicluster; largercrystals have an almost black dimensions refined from the powder pattern Eave a : internal reflection. Fairly brittle, H about 3. Most perfect 24.97(5),b: 8.09(l),c : A.04(2)A, B : 106.85(14)'. cleavage{100}. Most individual tabular crystals are Strongestlines from the I l4-mm Gandolfi powder pat- strongly curved. Optically strongly pleochroic, dark red- tern (Fe radiation)are 12.0(80)(200),5.99(80X0ll), dish-brown approximately perpendicular to the cleavage 4.02(l 00)(020,6 0 0), 3.3 5 (40) (420), 3.00 6 (4 Oxseveral), (: X) and yellow parallel to the cleavage;biaxial negative 2.618(50)(404,415),and 2.368(50).The specimenstudied with 2V: 50-55". is in the SmithsonianInstitution, Washington,D.C. J.L.J. NEW MINERAL NAMES t403

New Data Dumontite P. Piret, J. Piret-Meunier (1988) New crystal-structure determination of dumontite Pbr[(UOr)3Or(PO4)r]'5HrO. Cannizzarite. Bursaite Bull. Min6ral., lll, 439-442. Mozgova,N.I. Yu.S.Borodaev, E.G. Ry- N.N. Organova, Crystal-structure determination of dumontite showed abeva,A.V. Sivtsov,T.I. Getmanskaya,O.V. Kuzmina the spacegroup to be P2r/m and the formula to be as (1988) New data on carnizzatite and bursaite. Neues revised formula presumably also ap- Jahrb.Mineral. Abh., i58, 293-309. stated above. The plies to hiigelite, formerly Pbr(UOr)r(AsOo)r(OH)4'3HrO. Cannizzariteand bursaiteoccur asplaty, elongategrains J.L.J. up to I mm long with other Pb-Bi sulfosalts,native bis- muth, tetradymite, and joseite-B in the Shumilovskoe Sn-W greisendeposit, West Transbaikal,USSR. Eskebornite Z. Johan (1988) Crystal symmetry of eskebornite,Cu- Cannizzarite FeSer.Neues Jahrb. Mineral. Mon., 337-343. Electron-microprobeanalysis gave Pb 35.65,Ag 0.45, Electron-microprobe analysesof eskebornite confirm Bi 46.92,Sb 0.61, S 16.00,Se not present,total 99.63 that its ideal formula is CuFeSer;Ag, and probably also wt0/0,leading to a formula (Pb, noAgo o, )", ,, (Bi, on- Hg, may partly replacethe Cu. Single-crystalX-ray study Sbo,,,)"rroS,, ,,, close to that of low-Bi cannizzarite establishedthat the mineral is tetragonal, space group Pb4Bi5Srr.This is the first support for the existenceof P4mc or diffraction-equivale\1, Q: 5.5 I 8(4),c : I I .0a8(6) Se-freelow-Bi cannizzarite.Optical and crystallochemical A. fne structure of eskebornitemay be related to that of propertiesof this variety are similar to those of Se-bearing the sulvanite-typerather than the chalcopyrite-type.J.L.J. cannizzaite.

Godlevskite Bursaite (1987) Structureof godlevskite,NirSr. Acta Electron-microprobe analysis of four optically homo- M.E. Fleet Crystallogr.,C43, 2255-2257. geneousgrains gave an averageformula of (Pbo,,A& ,o)",,r- (1988)Stoichiometry, structure and twinning (Bi3e$bo06)roorS,orr,close to the initially (1955)described M.E. Fleet of godlevskiteand synthetic low-temperatureNi-excess formula Pb5Bi4S11for bursaite from Uludag, Turkey. The nickel sulfide.Can. Mineral., 26. 283-291. averagecomposition of the Shumilovskoe material cor- respondsto 383Gu,, o, in the nomenclatureof Makovicky New electron-microprobe data for godlevskite from and Karup-Maller (1977),and its composition field in the Noril'sk, northern Siberia, USSR, indicate a metal:sulfur (Bi,Sb)rS3-PbrSr-AgrSdiagram is similar to that for bur- ratio of 9:8. This result is consistent with the determi- saitefrom the type locality. Electron-diffractionand X-ray nation of the godlevskite structure in space group C222 powder patterns are lillianite-like; the powder pattern, and formula of (NirrFeor)Sr.The formula was thought which containsmore lines than the lillianite standard,can previouslyto be Ni'Su.J.L.J. be indexedas a mixture oftwo orthorhombic Bbmmphas- eswith respectivelya: 13.42,b:20.37, c:4.12 4,, Hydrocalurnite anda: 13.55,b : 19.79,c : 4.04A. Thesephases seem to be the exsolution products of the nonstoichiometric E. Passaglia,M. Sacerdoti(1988) Hydrocalumite from phaseIII ofOtto and Strunz (1968),because their bulk Montalto di Castro, Viterbo, Italy. Neues Jahrb. Min- composition falls into the high-temperature field of this eral. Mon., 454-461. phase.Material from the type locality, either describedas M. Sacerdoti,E. Passaglia(1988) Hydrocalumite from with by Makovicky and Karup-Moller (1977)or in- Latium, Italy: its crystal structure and relationship "'Gu,r, phases.Neues Jahrb. Mineral. Mon., dexedon lillianite cell dimensionsby Friedrich (1983),is related synthetic 462-475. likewise consideredto have beentwo-phase mixtures. The data obtained by different authors show that "bursaite" Hydrocalumite is known to occur both with monoclinic covers lillianite-like phaseswith a composition close to and rhombohedral symmetries.A new chemical analysis PbsBioS,| . It is proposedthat the name bursaite should be and comparison with published chemical data indicate retained for this variety oflillianite. that hydrocalumite has the general formula Car- Discussion.Assuming that the authors do not intend to Al(OH)u[X]'nHrO, where X consistsof (OH), Cl, and retain a mineral name for a mixture of two exsolvedphas- t/z(CO),and n rangesfrom 2 to 2.75.Hydrocalumite com- es, it is not clear which phase is to be named bursaite. positions are members of a solid-solution series in the The name certainly cannot be applied to two different ternary system Ca,Al(OH)u[Cl]' 2H'O-Ca,A(OH)6[OH]' phases,however difrcult it may be to distinguish them 3H,O-Ca,AI(OH)6(CO3)'5l' 3H,O. by chemicalor optical methods.E.A.J.B. Discussion.In addition to the mineral's having mono- 1404 NEW MINERAL NAMES clinic and rhombohedralsymmetries, (OH)-dominant and Discussion.The tentative composition and cell for sa- Cl-dominant natural members are known. The nomen- batierite are new. The proposal for crookesiteagrees with clatureneeds re-examination. J.L.J. data recentlyabstracted (Am. Mineral., 73,933, 1988). J.L.J.

Munirite H.T. Evans,Jr. (1988) The crystallographyof munirite, Sigloite - NaVOr.(2 x)HrO. Mineral.Ma9.,52,716-717. F.C. Hawthorne (1988) Sigloite:The oxidation mecha- nism in structures.Mineral. On the basis of a cell derived by indexing of its X-ray [Mr+(PO4)r(OH)r(HrO)r]'z- Petrology,38, 201-2Il . powder pattern, munirite was thought to be orthorhom- bic. The mineral is monoclinic, spacegroup P2r/a, a: Sigloite is isostructural with the laueite-groupminerals 16.72,b: 3.636,c: 8.015A, B : lll.0". Becauserhe and is the oxidized equivalent of paravauxite. The sim- mineral is slightly water-deficientrelative to the formula plified formula of paravauxite is Fe2+Alr(POo)dOH)r. NaVOr.2HrO, and it is not known how much water can 8HrO, whereasthat of sigloite as determined by crystal- be lost without destroying the structure, it is suggested structureanalysis is Fe3+Alr(POo)r(OH)3.7HrO. J.L.J. that the compositionbe definedas NaVOr.(2 - x)HrO, where x may vary from 0 to about 0.2. J.L.J. Tinticite Robertsite J.C. Melgarejo,S. Gali, C. Ayora (1988) Tinticite: New structural and chemical data. Neues Jahrb. Mineral. S.J.van Kauwenbergh,M. Cooper-Fleck,M.R. Williams Mor^.,446-453. (1988) The occurrenceof robertsite in a sedimentary phosphateore from Thailand.Mineral. Mag., 52, 505- Tinticite forms monomineralic centimeter-wide vein- 508. lets, and nodules up to 5 cm in diameter, in jarosite-rich Robertsite occursas pore fillings, as layersand coatings shalesat Bruguers, I 5 km southwestof Barcelona,Spain. on phosphate particles and between apatite layers, and The veinlets and nodules consist of cream-to-brown ag- gregates platy generally pm rarely as submicrometer-sized crystals in apatite, in a of crystals lessthan I in size. gave guano-derivedsedimentary phosphate ore from the Lam- Wet-chemicalanalysis FerO, 48.9, PrO529.4,Y2Os (rce) phun area of northwestern Thailand. Wet-chemical anal- 4.0, HrO 17.9, sum 100.2 wt0/0,corresponding to ysis gaveMnrO, 36.31,CaO 16.08,FerO, 1.10,Al2O3 2.02FerOr.1.42(PrOs + VrO5).6.56HrO, simplified as 2.4l,KrO 0.22,SiOr 0.0l, TiOr 0.25,BaO 0.08, SrO 0.04, Fel+(POo)r(OH)3.5HrO.Indexing of the X-ray diffractom- powder pattern (Cu gave PrOs33.28, HrO* (L.O.I.) 9.85,sum 99.63 wto/o.The for- eter radiation) monoclinic sym- metry,a: 13.65(l),b : 6.542(5),c: 12.31(DA, : mula ratios are CarrrMnljrPn,o(OH)r, rr, similar to those B in the formula CauMn!+O6(POo)e(HrO)6.3HrO proposed 91.2(1)",possible space group P2, Pm, or P2/ z. Strongest pattern (40)(202), by J. O. Nriagu (PhosphateMinerals, J. O. Nriagu and P. linesof the are 4.6037 3.950 4(9 5X 1 0 3 ), B. Moore,eds., Springer-Verlag, New York, l-136, 1984). 3.3070(100) (401), 3.0270(95) (4r0), 2.9836(60) (r04), The analysis is the first one published for this mineral. 2.3610(40\420),and r.9464(40\331,116).With the sim- J.L.J. plified formula, D.ur.: 2.97 g/cm3for Z: 3; D^u": 2.94 g/cm3(pycnometer). The cell dimensions, symmetry, and formula are new. J.L.J. Sabatierite, Crookesite R.A. Berger(1987) Crookesiteand sabatieritein a new light-A crystallographer's comment. Zeits. Kristal- Xitieshanite logr.,l8l,241-249. JingliangZhou, Jiaju Li, Wei Done (1988) The crystal Electron-microprobeanalyses, synthesis, and X-ray data structure of xitieshanite. Kexue Tongbao, 33(6), 502- (foreign languageedition, in English). for crookesiteindicate that the mineral is tetragonal,space 505 group 14, and has the composition TlCurSeo.Attempts to Xitieshanite originally was assignedthe formula synthesizeTlCuuSeo, the proposed composition of saba- Fe3+ (SO.)(OH). 7HrO lseeAm. Miner al., 69, 11 9 4, 19841, tierite, yielded three-phasemixtures. Although no speci- but a new chemical analysis of material from the type men of sabatieritewas examined,comparison ofthe X-ray locality gave a Cl content of 10.05 wto/0.X-ray crystal- powder data for this mineral and synthetic TlCuoSe,sug- structureanalysis gave monoclinic symmetry, spacegroup geststhat they are identical and are best indexed with a P2r/c, and cell dimensions similar to those reported pre- tetragonalcell of about a : 3.997,c : 9.841A. tt is viously but with a and c interchanged;R : 0.0297 was recommendedthat sabatieritebe reinvestigated. obtainedwith the new formula Fe3+(SOr)Cl.6HrO.J.L.J.