American Mineralogist, Volume 74, pages 500-505, 1989

NEW NAMESX

JonN L. J.runon CANMET, 555 Booth Street,Ottawa, Ontario KIA 0G1, Canada J,tcnx Puztnwtcz Institut fiir Mineralogie, Universitet Hannover, D-3000, Hannover 1, Federal Republic ofGermany

S (S) 6.1I, polysulfideS (S")7.25, thiosulfateS (S) 6.20, Abhurite* HrO (hydroxyl) 9.46, H,O (molecular)31.20, O 12.20, J.T. Matzko, H.T. Evans,Jr., M.E. Mrose,P. Aruscavage total I00.00 wto/0,corresponding to Ca(Stu,Si'r)ro*Ca- (1985) Abhurite, a new hydroxychloride mineral, (S1rrO, oo)' Ca6 oo(OH),2 20' 20. I 4HrO. The mineral forms and a comparative study with a synthetic basic tin chlo- aggregatesup to I cm in diameter, orangeto yellow, light ride. Can. Mineral., 23,233-240. yellow ,vitreous luster; intergrowths ofparallel plates Chemical analysisgave Sn 73.4, Cl 15.7, O 11.0, H have a pearly luster. Crystalsare bladesup to 5 mm long, 0.4, sum 100.5 wto/o;the ideal formula SnrO(OH)rCl re- flattenedon {010), elongate[001], with {ll0} edgesand quiresSn 74.6,Cl 14.9,O 10.1,H 0.4 wto/o.The mineral rerminaredby {01l}, {l0l}, and {l I l}. Thin crystalsare occurs as cryptocrystalline crusts and as platy hexagonal transparent,and coarsergrains are transparent to trans- crystals that average 1.5 mm in diameter. Colorless, lucent. uneven,very good {010} ,brittle transparent with opalescentluster, white streak, hackly but elasticin thin leaves,H: 2, r-.." : 1.83(l), D"",": fracture, H: 2, dissolvesslowly in HCI and HNO3, D*"". 1.845g/cm3 withZ: 1. No luminescencein ultraviolet : 4.29 (pycnometer),D"r": 4.35 g/cm3 with Z : 21. Iight (360 nm). Decomposesin water, giving S and a white Crystalsare platy to tabular on hexagonal(0001), twinned porous residuum; decomposesin HCI to give S and HrS. on (0001), and have rhombohedral forms {0115} and Slowly hydrolyzes in air, gradually becoming colorless {0001}. Optically uniaxial positive,o: : 2.06,e : -2.11. with a weak bluish tint, preservingthe transparency.Hy- Single-crystalX-ray study indicated rhombohedral sym- drolyzed pseudomorphstypically have porous aggregates metry, spacegroup R3m, R3m, or R32 the refined Gui- of S on their surfaces.The DTA curve shows a strong nier-Hiigg powder pattern (CuKa,) gave hexagonal pa- endothermaleffect at 140"C (lossof molecularwatet,37.7 'C rametersa : 10.0175(3),c:44.014(2) A, and strongest wto/o),a distinct exothermal one at 365 (loss of sulfidic lines of 4.1 39(50X1 l 6), 3.404(50X208),3.27 r(35)(2rr), and polysulfidic , 13.4 wIo/o),and an endothermal 3.244(3s)(r22), 3.r42(3s)(2r4), 2.9074(35)(217), one at 495 "C (loss of hydroxyl water, 16.2 wt0/0).Addi- 2.8915(70X300),2.8175(50X128), 2.5313(100)(l 1.15), tional weight loss at higher temperatures is 4.80/0.The and 1.8928(3sX4l0). infrared spectrum shows absorption bands at 810 (HrO), Abhurite occurs as blisterlike protuberancesthat formed ll00 (SO and S,O,), 1630 (H,O), and 3300 (OH) cm-'. as a corrosion product of tin ingots recovered from the Opticallybiaxial positive, a: 1.595(2),B : 1.619(2),7 cargoofa sunkenship, wreckedpossibly 100 yr ago,lying : 1.697(3)(white light), a: Y, b : X, c A Z : 30",2V.,," in a Red Seacove known as Sharm Abhur, about 30 km : 60'20'. Strong pleochroism: X deep green-yellow, Y north of Jiddah, Saudi Arabia. Associated are greenish-yellow,Z palegreenish-yellow, X > Z > Y. Sin- romarchite, kutnohorite, and . Specimens of gle-crystal X-ray study shows the mineral to be mono- abhurite are in the Smithsonian Institution, Washington, clinic, P2,/c, a: 8.45(l),b: 17.47(l),c: D.C., and in the Royal Ontario Museum, Toronto, On- 8.24(l), B : I19.5". Strongestlines of the powder pattern tario. J.L.J. (57.3-mmcamera) are 8.76(100X020),4.39 (100X040), 2.91 (60X060), 2.8 l(50X240), 2.62(s0)(r22),2.28(50)(260), and 1.996(70)(162).The X-ray pattern of the mineral is Bazhenovitex similar to that of its synthetic orthorhombic analogue. B.V. Chesnokov,V.O. Polyakov,A.F. Bushmakin(1987) The of the mineral is layered, with Bazhenovite CaSr.CaSrO.. 6Ca(OH)r. 20HrO-A new Ca(OH)r, polysulfide, and water-bearinglayers parallel to mineral. Z,apiskiVses. Mineralog. Obshch., 116,737- {010}. 743 (it Russian). Bazhenovite is associatedwith native iron, native sul- Wet-chemical analysis combined with rc results (water) fur, oldhamite, troilite, pyrrhotite, , and prod- and corrected for impurities (Fe) gave Ca 27.58, sulfide in altered pyritized siderite fragmentsin the melted ucts of old, burning coal dumps of the Chelyabinsk coal basin, south Ural Mountains, USSR. The name is for A. Bazhenov (petrographer)and L. F. Bazhenova (ana- * Prior to publication, minerals marked with an asteriskwere G. approved by the Commission on New Minerals and Mineral lytical chemist). Type material is in the Fersman Min- Names, International Mineralogical Association. eralogicalMuseum, Moscow. J.P. 0003-o04x/89/0304-0500$02.00 s00 JAMBOR AND PUZIEWICZ: NEW MINERAL NAMES 501

Cesplumtantite* north of Mingary and on the Adelaide-Broken Hill rail- A.V. Voloshin, Ya. A. Pakhomovskii, A. Yu. Bakhchis- way about 470 km from Adelaide. The holotype specimen araitsev,N.N. Devnina (1986)Cesplumtantite-A new (M32479) is in the Museum of Victoria, Melbourne, Aus- cesium-leadtantalate from granitic pegmatites.Miner- tralia. J.L.J. alog.Zhurnal 8(5), 92-98 (in Russian). Microprobeanalysis (3 given)gave TarO, 63.85,NbrO, Ecandrewsite* 3.24,CsrO5.37, Na,O 0.71, CaO 0.83, PbO 20.24,5b,O3 2.88, SnO, (calculated)1.60, sum 100.21 wt0/0,corre- W.D. Birch,E.A.J. Burke, V.J. Wall, M.A. Etheridge(1988) Ecandrewsite,the zinc analogueof ilmenite, from Little sponding to (CsonrNao ruCao.u)r, ss(Pbr rrsbflj8 Snfijr),rrr- Broken Hill, New South Wales, Australia, and the San (Ta, orNbou$nt;u)r, nrOro,ideally (Cs,Na)r(pb,Sb3*)3Ta8O24 Valentin Mine, Sierra de Cartegena,Spain. Mineral. with Cs > N4 Pb > Sb. X-ray powder study shows the Mag., 52,237-240. mineralto be tetragonal,a: 13.552(8),c : 6.445(l A, Z : 2. The strongest X-ray lines (35 given) are Four electron-microprobeanalyses of the mineral from 6.l l (50)(21 0), 3.I 9(50X330),3.054( I 00)(t| 2), 2.037(s0, the type locality, the Melbourne Rockwell mine at Little diffuse)(621),1.869(70X323), 1.593(70X821), and Broken Hill (13 km southeastof the main Broken Hill I . 18 I (50X654).The mineral is colorless,transparent, white deposit, New South Wales),gave TiO, 50.12-52.45,FeO streak, adamantine luster. No cleavageobserved. Micro- 8.8- I 3.6 5, MnO 4.4-7.64, ZnO 28.5-3 5.05, toral 98. 8 5- hardness1240 kg/mm, (40 g load). D."b : 6.87(5)g/cm'. 100.0wto/0, correspondingto (Zno ss. 6sFeo,n- ,oMno,o_o ,r)- Light gray in reflectedlight, weak bireflectance,no pleoch- Ti.ee-r0303,ideally ZnTiOr,theZn analogueof ilmenite. roism or internal reflection. Strongly anisotropic, with At the type locality the mineral occursas euhedraltabular complex polysynthetic twinning. Reflectancevalues (nm, grains,up to 50 by 150pm. Physicaland optical properties o/o) in air (Si standard)are 47 6, 18.2,17 .l ; 55 3, I 7.3, I 6.5; are similar to those of ilmenite: dark brown to black color 589,17.1, 16.5;656,15.6, 15.3. and streak, submetallic luster, VH,oo: 500-600 kg/mrn2, Cesplumtantite was found in a museum specimen of no cleavageor twinning, D.,,: 4.99 g/cm3with Z: 6. thoreaulite in granitic pegmatitefrom Manono, Zaire. The In reflectedlight, grayish-whitewith a pinkish tinge, weak new mineral occurs as veinlets ofelongate aggregatesup reflection pleochroism in air, strongly anisotropic from to 0.3 mm long and is associatedwith lithiotantite, cas- greenish-grayto dark brownish-gray. Reflectancevalues siterite, calciotantite, and microlite. The name alludes to in air (SiC standard) for R. and R. are 470, 19.2-19.9, the chemical composition. The type specimen is at the 17.2-17.7;546, 19.0-19.7,17.2-17.6; 589, 18.9-19.6, Museum of the Leningrad Mining Institute, Leningrad, 17.0-17 .6;650, 18.7-19.2,16.8-17 .5. X-ray crystal-struc- USSR.J.P. ture study indicated rhombohedral symmetry, spacegroup Cobaltaustinite* R3, hexagonalcell dimensions 4 : 5.090(l), c : 14.036(2) A. Strongest lines of the powder pattern arc 2.73- E.H. Nickel, W.D. Birch (1988)Cobaltaustinite-A new (r00x1014),2.53(90)(l r20), 2.23(60x1 123), 1.87(40)- arsenatemineral from Dome Rock, South Australia. (0224), Austral. Mineral., 3, 53-57. and 1.71(70)(1126),inclose agreemenr wirh data for syntheticZnTiO, (PDF 26-1500). Electron-microprobe analysis gave CaO 22.4, CoO At the type locality the mineral is disseminated in - 25.8,CuO 2.5, AsrO,46.l, PrO,0.3, SO3 0.3, HrO (CHN rich metasedimentaryrocks of amphibolite-granulite fa- analysis) 3.6, sum l0l.I wt0/0,corresponding to cies and coexists with almandine-spessartine,ferroan Ca,o,CoorrCuoorAs, o,Poo,Soo,O._06(OH), 0,, simplified as gahnite, and rutile. Associatedamphibolites contain zin- Ca(Co,CuXAs,P,S)Oo(OH)and ideally CaCoAsOo(OH). cian ilmenite. The new mineral was discoveredalmost 20 Additional microprobe analysesshow substantial Co-Cu yr agoin flotation residuesofoxidized ore from the North variations, suggestingcomplete solid solution with coni- mine at Broken Hill. At the San Valentin mine, La Union chalcite, the Cu end-member. The mineral occurs as dull district, Sierra de Cartegena,Spain, ecandrewsitegrains green coatings of crystallites up to 25 pm in diameter. up to 50 pm acrossoccur intergrown with zincian ilmenite Streak pale green, brittle, conchoidal fracture, H: 4t/2, in primary oxide-sulfate-carbonateores. The new name solublein HCI and HNO,, D.il.: 4.24 g,/cm3for the an- is for E. C. Andrews, New South Wales government ge- alytical formula andZ:4. Optically biaxial positive,cY' ologist(1870-1948), who mappedthe BrokenHill region. : : 1.777(3),7' 1.802(3),large 2V, greenish-yellowand A single grain from the Melbourne Rockwell mine type not pleochroic.Cell dimensionscalculated from the X-ray locality is at the Museum of Victoria (M35700). Speci- powder pattern (l14.6-mm Debye-Scherrercamera, Cu mens from the San Valentin occurrenceare in the col- radiation) indexedby comparisonwith nickelaustiniteare lections of the Free University, Amsterdam, the Neth- : : : a 7.50, b 9.01, c 6.92 A; strongesrlines are erlands.J.L.J. 4.13(70X1Il), 3.159(100)(201),2.633(80x1l2), 2.600(80)(22r), 2. s 32(40)(13 I ), and 1. 609( I 00X33 2). Cobaltaustinite occurswith erythrite and numerous other Fahleite* arsenatesderived by oxidation ofarsenide-rich ore at the O. Medenbach, K. Schmetzer,K. Abraham (1988) Fah- small Dome Rock copper deposit, which is about 42 km leite from Tsumeb/Namibia, a new mineral belonging 502 JAMBOR AND PUZIEWICZ: NEW MINERALNAMES

: to the smolianinovite group. Neues Jahrb. Mineral. 2.38-2.50 (suspension),D"urc : 2.55 g/cm3 with Z 2. Mon.,167-171. Opticallybiaxial positive,a : 1.664(4),8, ,,: 1.698,7 : | .757 (5), 2V : 77 (10)', strongdispersion; pleochroism X Electron-microprobe analysesof five different crystal : gyegnish-yellow,Inot observed,Z: brownish-yellow' ag$egatesgave CaO 3.8-4.3, MnO 0.,1-0.6,ZrrO 25.6- Z > X, Z t c : -l7o and Z approximately parallel to 26.5,Fe.O, 10.1-10.4,As,O, 43.1-44.2,H,O (by differ- the elongation. X-ray single-crystal study indicated tri- ence) 14.4-16.6 wto/o,Co, Ni, Mg, and Si not detected; clinic symmetry, pseudomonoclinic, spa-cegroup Pl or the mean of the analysescoffesponds to Ca,,,Mno,,- Pl, a : I 0.0I (2),b : 9.73(2), c : 7.334(8) A, a : 90.52(12), Zn, | 3. 42H ideallyZn CaFel* (AsO)u' orFe?tnAs, ,O 20. rO, :96.99(10), | 16.43(10)'.Twinned { I l0}. Strongest l4HrO, considered to be the Zn analogueof smoliani- P t: Iinesof the powderpattern (l14.6-mm Gandolfi camera, novite. The mineral occurs as minute fibrous aggregates Fe radiation)are 8.87(80X100),5.34(l00X0l l,l1 1), or spherulesand as gray to bright green to straw-yellow 4.4 8(20X l I 1,200), 4.37(20)(020,211), 4.20(30)(220), bundles of fibrous crystals more than I cm long. The 3.442(30)(0r2), 3.3 8 7(30X 2r0), 3.267(40X0 1 2), 3.I 96 crystals are only a few micrometers thick, are very soft, (20)(I 02.320). and 3.022(20)(202). sectile, flexible, have a silky or pearly luster, are readily Ferristrunzite is associatedwith crandallite, diadochite, soluble in cold acid, and have a perfect cleavagenormal allophane-evansite,minyulite, ,phosphosiderite, to the fibers.The infrared spectrum(not given) is reported cacoxenite,and that occur as secondary min- to confirm the presenceof HrO. Optically biaxial positive, erals in argillaceousand clastic sediments exposed in a with parallelextinction, positive elongation, a: 1.628(l), canalnear Blaton, Belgium. Type material is at the Smith- B : 1.631(l),^y : 1.656(l),ZV.a": 39', Z patallelto the sonianInstitution, Washington,D.C. J.L.J. fibers.The X-ray powder pattern containsonly five difuse lines, with d values and (intensities) as follows: 22(100), I l(100),3.2(80), 2.9(50), and 1.65A (zO);the dataare in Fluorellestadite* good agreementwith the sevensimilarly diffuse lines re- B.V. Chesnokov,L.F. Bazhenova,A.F. Bushmakin(1987) ported for smolianinovite. Fluorellestadite Ca'o[(SOo),(SiOo)]6F,-A new mineral. Fahleite is named for Rolfe Fahle of Munich, a mineral Zapiski Vses. Mineralog. Obshch., 116, 743-746 (in dealerwho donatedthe holotype specimen.Type material Russian). in Mineralogical Institute, Ruhr Univer- is deposited the Wet-chemical analysis of impure material gave SO, Bochum, Federal Republic of Germany. sity at 20.75,SiO, 15.30, P,Os 1.31, CO,0.66, CaO 55.00, MnO Discussion.If fahleite is the Zn analogueof smoliani- 0.18,MgO 1.38,AlrO3 1.84, FerOr 0.l l, NarO0.33, KrO novite, then the latter requiresredefinition of its formula. 0.1, H,Ot 0.30,F 3.60,sum 100.76.When correctedfor ideal formula Zn,CaFe)+(AsOo)u'l4HrO, Fahleitehas the impurities (MgO, AlrOr, 4o/oCaO,FerO,, NarO and HrO*), and smolianinovitewould be CouFel+(AsOo)u'l4HrOor the analysis correspondsto (CarnrMnoor)'rooo[(SOo)rro- Co,CaFel+(AsOo)u'l4HrO. Cell dimensions of fahleite (SiOo),?r(PO4)o ro(CO,)o,rl* *F, or,ideally Ca'o[(SOo),(SiOo)]6- (calculated indices assignedto smolianinovite) from the Fr. The mineral occursas blue to pale bluish-greenneedles, area: 6.60.b: 11.6.c:22 A. .f.f,."f. as hexagonalprismatic, poorly terminated crystals up to 3 mm long, and as fine-grained aggregates.Thin needles Ferristrunzite* are colorless,crystals are transparent, and aggregatesare D.R. Peacor,P.J. Dunn, W.B. Simmons, R.A. Ramik translucent.Vitreous to greasyluster, conchoidal fracture, (1987) Ferristrunzite, a new member of the strunzite no cleavage,white streakwith a weak bluish tint, H: 4'5, group, from Blaton, Belgium. Neues Jahrb. Mineral. D-"", : 3.03(l),D*rc : 3.090g/cm3 with Z: l. No lu- Mon., 453-457. minescencein ultraviolet light (360 nm). Soluble and Electron-microprobe analysis gave FerO, 46.3, P2Os weakly effervescentin HCl, leaving a silica residuum that 28.2,and TGA-EGAgave HrO 26.0, sum 100.5wto/0. Mi- retains the original form. ore and rcn curves are fea- crochemical tests showed a strong reaction for Fe3* but tureless,and only I wto/oloss occurs on heating to 1000 'C. no reaction for Fe2*. The results are in good agreement Optically uniaxial negative, colorless,negative elon- with those reported for the same mineral by van Tassel gation,e : 1.632(2),co : 1.638(2)for white light. The X- (Bull. Soc.Belge GeoL.,75,3848,1966) and correspond ray powder pattern, indexed by analogy with ellestadite to FeStFe;to(PO4)r(OH),KHrO),88(OH)o,ul. The idealfor- (spaiegroup P6r/m) gavea: 9.485(2),c: 6.916Q)A, mula is Fe3"Fe!+(POo)r(OH)rKHrO)'(OH)'ul,and that of and strongestlines of 2.84(100)(21 l ), 2.80(60X 1 12),2.7 4 strunzite is MnFel+(Poo)r(oH)r(HrO)u.The new name (90x300),2.28 (60)(3 l0), r.9s4 (7 0)(222), 1.852 (80)(2 I 3), alludes to the composition and relation to strunzite. | .76 6 (6 0) (402), | .729 (7 0) (00 4), and r .4 6 3 (6 0)(3 2 4). Ferristrunzite occurs as light brownish-yellow matted Fluorellestaditeis associatedwith lime, periclase,mag- aggregates:crystals are acicular [001], 2 to 30 pm long; nesioferrite, , srebrodolskite,, and an- compositesare up to 0.5 mm long; and radiating sprays hydrous lime silicates in burned fragments of petrified are up to 2.6 mm in diameter. Light yellow streak,brittle, wood in coal dumps from the mines of Kopeysk, Che- good cleavageparallel to the X-Z optical plane, D-"." : lvabinsk coal basin, south Ural Mountains, USSR. The JAMBOR AND PUZIEWICZ: NEW MINERAL NAMES 503 new name is for the chemical composition and analogy showed the mineral to be cubic, isostructural with egle- to ellestadite. The name had appeared in the literature stonite. Spacegroup (by analogywith eglestonite)Ia3d, a previously(Am. Mineral. 67,90-96, 1982),bur a defin- :16.22 A. Strongestlines of the X-ray powder pattern itive description had not been given. The new mineral is (28 lines given) are 4.06(30)(400),3.32(100)(422), the F analogueof hydroxylellestadite,Ca,o(SiO),(SOo).- 2.6 3 (20)(6 1 r,s 32), 2.s 7(6 0 -7 0)(620), 2.3 4 4 (20)(4 4 4), (OH)r. Type material is in the Fersman Mineralogical 1.912(80-90)(822,660),and 1.731(20)(664). D,u,,: 8.79 Museum, Moscow.J.P. g,/cm3with Z : 24. Bright to dull orange color, orange- yellow streak,brittle, vitreous to adamantine luster, H : 2.5 to 3, microhardness143-192 (average175)kglmm'z, Isocubanite* conchoidal to uneven fracture, no cleavage.Transparent R. Caye,B. Cervelle,F. Cesbron,E. Oudin, P. Picot, F. in transmitted light, bright orange-yellow,isotropic, re- Pillard (1988)Isocubanite, a new definitionofthe cubic fractive index >2. In reflected light, grayish-white, with polymorph of cubaniteCuFerSr. Mineral. Mag.,52,509- weak bluish tint visible at high magrrifications.Isotropic, 514. no bireflectance,intense orange internal reflection. Re- (nm, o/o): The cubic phaseof CuFerS,has been variously named flectance 436,27.7; 460,25.3; 500,21.2; 546, polishable, chalcopyrrhotite, cubanite II, cubic cubanite, and lss (in- 19.4;589,18.1; 620, 17.8;656,16.6. Readily polished termediate solid solution of CuFerS, composition); the but afterexposure in air the surfacebecome bluish, name isocubanite has been approved to designate this then brownish. cubic polymorph of cubanite. Five electron-microprobe Kadyrelite occursin cavities in carbonateveins, or rare- grains analysesof isqcubanitefrom modern "black-smoker" sul- ly forms individual up to 0.5 mm at the Kadyrelsky (USSR), fide chimneys at 21"N, East Pacific Rise, gave Cu 20.79- mercury ore occurrence,Tuvinskaya ASSR where 21.52, Zn 0.77 -1.09, F e 4 | .64-42.49, S 35. 49-3 5 .82 wto/o, it is intergrown with eglestoniteand bromian eglestonite correspondingto a range of Cuon,ZnoorFerorS,to and is associatedwith calomel, bromian calomel, kuz- CuonoZnoorFerorS..The mineral is opaque,bronze color, minite, corderoite,lavrentievite, etc. The new name is for metallic luster, grain sizeup to 400 pm, typically euhedral the locality. Type material is at the Museum of the In- (Novosibirsk, with cubo-octahedra present and with rims and,/or la- stitute of Geology and Geophysics USSR), mellae of Fe- and Zn-ich chalcopyrite. Pinkish-brown in and at the Museum of the Leningrad Mining Institute, Leningrad, reflectedlight, isotropic, slightly browner and softer than USSR. J.P. pyrrhotite. Reflectivity percentages(SiC standard)are giv- en in 20-nm steps;representative values in air and oil, Pottsite* respectively,are 420, 22.7 3, 12.9 4; 460,26.87, 1 6.40; 500, 31.34,20.08; 540, 34.79,22.73; 580, 37.35, 24.58 620, S.A. Williams (1988)Pottsite, a new vanadatefrom Lan- 39.11, 25.83;660, 40.32,26.80;'7 00, 4 1.33,27 .48: j 40, der County, Nevada.Mineral. Mag., 52,389-390. 41.91, 27.87; 780, 42.50, 27.42. Single-crystalstudy Electron-microprobeanalysis gave PbO 32.4,81rO3 34.0, showedthe mineral to be cubic, spacegroup Fm3m, a: Y 20s 26.6, HrO 6.7| (Penfielddetermination on 216 pg), 5.303(3)A lstighttylarger than thar of pure syntheticma- sum 99.7I wto/o[corresponding to H, o2Pb0eeBi. en(VOo), nr' terial (4 : 5.283-5.286) becauseof the minor substitution 2.0HrOl, ideally HPbB(VO4)r'2H,O. The special site of Znl. The X-ray powder pattern ( I l4-mm Gandolfi cam- for H is assignedmerely to provide chargebalance. The era,Fe radiation)consists offive lines:3.059(100Xlll), mineral is bright yellow, adamantine luster, pale yellow 2.647 (20)(200), l 876(70)(220), 1 . 602(5 1l 0X3 ), and streak,brittle, H : 3t/2,D-""" : -7 .0, D."t : 7.31 g/cm3 1.327(20)(400).Typematerial is in the Mineralogical Col- with Z: 10. Crystalsare up to 1 mm long and are di- lection ofthe EcoleNationale Sup6rieure paris. desMines, pyramids or stubby prisms terminated by pyramids; l0 1 J.L.J. { } is typically dominant, and also presentare { I l0}, { 103}, and {211}. In thin section,cloudy yellow, uniaxial neg- : : Kadyrelite* ative, c,r 2.40, e 2.30. X-ray single-crystalstudy in- dicated tetragonal symmetry, space group I!22, a : Vasile'v V.I. (1987) Kadyrelite Hg(Br,Cl)rO-A new I1.084, c : 12.634A. Strongestlines of the powder pat- oxyhalide of mercury from the Kadyrelsky ore occur- tern (l l4-mm camera,Cr radiation) are 4.618(90)(121), rence (Tuvinskaya ASSR). Zapiski Vses. Mineralog. 4.168(30)(022), 3.210(40)(123), 3.062(l00X132), Obshch.,| 16,'733-7 37 (in Russian). 2.476(40)(240), 2.2s2(30X l 2 5), 2.l 84(30)(05 r,34 r), Microprobe analysis (averageof 5) gave Hg 84.36, Br | .952(30)(23 5,24 4), and 1. 5 23(30). 10.19,Cl 2.93,I0.01, O (calc.)1.70, totat 99.t9 wto/o, Pottsite occurs near Potts, Lander County, Nevada, in correspondingto Hg. nn(Br,,rcl. re)rr00O, 0,. In 400/oKOH the oxide zone of a tungsten mine. Associated minerals the mineral immediately turns black; in HCl, it slowly are scheelite,clinobisvanite, bismutite, and vanadinite. becomesdark gray, and it is readily soluble in l: I HNO,, Type material is in the British Museum (N.H.), London, leaving a cottonlike white residuum. X-ray powder study England.J.L.J. 504 JAMBOR AND PUZIEWICZ: NEW MINERAL NAMES

Zharchikhitex eralogical collection of the National Museum' Spectro- chemical analysisof about 40 mg showedAu, Hg, and Fe S.V. Bolokhontseva,S.V. Baturin, E.S. Ilmeyev, M.A. principal Single-crystalX-ray study Papova,S.P. Purusova ( I 988) Zharchikhite AIF(OH)r- to be the elements. c : 4.810A. A new mineral.Zapiski Vses.Mineralog. Obshch., I17, indicatedhexagonal symmetry, a: 2.951, 79-83 (in Russian). Indexed Gandolfi powder patterns (three are listed) are in good agreementwith data for synthetic AurHg (PDF'l- gaveAlrO3 59.03, SiO, 2.54,MnO Wet-chemicalanalysis 808). 24.55,O = F 0.07,CaO 0.39, MgO 0.13,F 22.96,H2O Although gold occurs at Sumidouro, mercury minerals microprobe analysisgave Al2O3 9.67, sum 100.00,and are not known. AurHg could have formed naturally or suggestingthat Mn, Ca, 61.8, SiO, 0.5, sum 62.3 wo/o, could be the result of mining activity known to have oc- part due to impurities; the ideal Mg and of the Si are curred in the region. has strong formula is AIF(OH)r. The infrared spectrum Discussion.The samemineral has been reported to oc- proving the pres- absorption bands at 3200-3700 cm-r, cur in a gold-silver orebody in China and has been named goups pra exhibits enceof OH in the mineral. The curve weishanite(Am. Mineral., 73, 196, 1988).J.L.J. a marked endothermal effect at 480'C, a weaker one at 600'C, and two weak and diffuseones at 845 and 860 'C. Weightloss (0/o): 560 "C,22.04;560-650'C, 3.64:'650- Unnamed Mn PhosPhate 800"C, 4.45;800-900 "C,3.23; sum 33.36.After heating D.R. Peacor,P.J. Dunn, R.A. Ramik, T.J. Campbell' W.L. to 650 the mineral becomesopaque and milky, and its "C Roberts (1985) A wicksite-like mineral from the Bull low- refractive indices and birefringenceare significantly Moose mine, South Dakota. Can. Mineral',23,247- ered.Zharchikhite doesnot react with acids, but is mildly 249. soluble in NaOH (heating enhancesthe dissolution rate). gave 17.2,FeO9.2,MgO 0.2, The mineral forms drusy aggregatesconsisting of fine- Chemicalanalysis FerO, 40.9,HrO 4.2,sum grainedmasses that gradeinto transparent,colorless, pris- CaO 12.0,NarO 0.8, MnO 16.9,PrO5 by titration, HrO matic crystals up to 2.5 mm long. The crystals are or- 101.4 wt0/0.The FeO was determined from the 6.70loloss obtained by rc,t-nca, thorhombic, elongate[001], with prominent {110} and by estimation by electron-microprobe analysis.The ten- {010}, and terminatedby {101} and {lll}. Lustervit- and all others reous, microhardness 596 kglmmt parallel to the elon- tative formula is FeiirFe3jrMgo,oCa, ,rNar o.Mn, r orPr,,r- gation, 426 kg/rnm2 perpendicular to it, average500 kgl H, nrrO,or rr, generalizedas (Mn,Fe3*,Fe'*'Na,Ca,Mg)rCa, is dark green and has a mm'z(H:4.5, Mohs).Verybrittle, perfect{010} cleavage. (PO")6(OH,HrO)0.The mineral but is dull on D-""": 2.81(l),D"ur,:2.82 g,icm3.Biaxial negative, a: slightly pearly luster on cleavagesurfaces surfaces,D-.", : 3.64(5) by suspension,D.or" : 1.532(2),P : r.552(2),t : r.567(2)(592 nm), 2V.^: fracture biaxial positive, a : 8C',Z n c : 4344, Y : b, optic-axisplane (0 I 0), inclined 3.766 glcm3wfihZ: 4. Optically : : 1.796(3),2Vabout 75'; in- dispersion, r > v. Single-crystalX-ray study showed the 1.781(3),P 1.787(3),t pleochroic: : dark brownish-green, Y: dark mineralto bemonoclinic, space group P2r/ a, a: 5.I 64(I ), tensely X g1een,Z: medium brownish-green,X > Y > Z, strong b:7.843(l), c: 5.179A, B : t 16.244(8).The strongest photographsare ofpoor qual- lines(43 given)of the powderpattern are 3.98(100X01l), dispersionr < v. Precession wicksite. The X-ray powder 2.e2(80)(12 r), 2.3| (70)(200), I .8 3 3 (90) (23 1 ), r.t 37(7 0)- ity but resemble those of Fe radiation)also is (21 l), and r.289(70)(402). pattern(l14.5-mm Gandolficamera, cell Zharchikite occurs in cavities in hydrothermally min- similar to that of wicksite and yields an orthorhombic : : : eralized fault breccia in a trachytic neck in the Zharchin- with a 12.77 (l), b 12.59(l),c I 1.709(8)A; sffongest (9 | l), skoyestockwork molybdenum deposit,Zabaykalye, USSR. linesare 6.3 I (40X020),5. 84(5 0X002), 2.997 0)(232,4 (60). The new mineral is associatedwith prosopite, ralstonite, 2.9 2 7 ( I 00X004), 2.769 (l 00)(042,42 r), and 2.0 9 8 gearksutite,barite, and siderite. The name is for the place The new mineral occurs as a drusy coating on barbos- The min- of occurrence.Type material is at the Fersman Mineral- alite from the Bull Moose mine, South Dakota. wicksite, but ogicalMuseum, Moscow.J.P. eral is thought to be the Mn analogue of more work is neededto resolve the uncertaintiesin their formulas. The samples studied are in the Smithsonian Unnamed AurHg Institution, Washington, D.C. (NMNH 159890 and N.R. Baptista,A. Baptista(1987) Gold amalgam,a pos- 159892).J.L.J. sible new mineral species,from Sumidouro de Mariana, Minas GeraisState. An. Acad. brasil. Ci0nc., 58, 457- New Data 463 (in Portugese,English summary). Ehrleite Microcrystalline aggregatesand rosettesof pale yellow, metallic, hexagonalprismatic crystals from Sumidouro, F.C. Hawthorne, J.D. Grice (1987) The crystal structure Mariana County, Minas Gerais State, Brazil, are present of ehrleite, a tetrahedral sheetstructure. Can. Mineral., in a vial of grains constituting sample 6210M in the min- 25,767-774. JAMBOR AND PUZIEWICZ: NEW MINERALNAMES 505

X-ray crystal-structurestudy ofholotype ehrleiteshowed A new, complete chemical analysis of holotype rog- that the formulais CarZnBe(POo)reO3OH).4HrOand the gianite revealedthe presenceof 3.19 wto/oBeO. Re-inter- cellis triclinic,space group Pl, a:7 .130(4),b:7 .430(4), pretation of the composition, based on the chemical re- -- c: 0.a79Q) A, ot:94.31(5),P 102.07(4),t:82.65(4)'. sults and crystal-structure considerations, leads to the The formula and unit cell are new. J.L.J. formula Ca,o(Na,K)[Be,Al',SirrOno(OH)r4](OH),'34HrO. Roggianiteis consideredto be a zeolite-group mineral: it has an appreciableion-exchange capacity and attains al- Ramsbeckite most complete rehydration after heating to 750 "C. J.L.J. H. Effenberger(1988) Ramsbeckite,(Cu,Zn),,(OH),,- (SOo)o.6HrO:Revision of the chemicalformula based on a structure determination. Neues Jahrb. Mineral. Mon., 38-48. Uranophane X-ray crystal-structure determination, utilizing type material provided by one of the co-authorsof the 1985 D. Ginderow (1988) Structure of alpha uranophane, original description of ramsbeckite, led to a revision of Ca(UOr)r(SiOrOH)r'5HrO. Acta Cryst., C44, 421-424 (in the formula to (Cu,Zn),r(OH),,(SOo)o.6HrOwith Z: 2; French). the originalformula was (Cu,Zn),(OH),0(SOo)r.5HrO with Uranophanewas consideredpreviously to have the for- Z: 4. J.L.J. mula (H.O),Ca(UO.),(SiO")r'3HrO,but X-ray determi- nation of the crystal structure showedthat chargebalance is attained bV (OH) in (SiOrOH) tetrahedra rather than Roggianite by the presence of (H.O). The new formula is E. Passaglia, G. Vezzalini (1988) Roggianite: revised Ca(UO,),(SiO3OH)''5H,O. chemicalformula and zeolitic properties.Mineral. Mag., Discussion.The new formula should apply also to uran- 52,202-206. ophane-beta,which is dimorphouswith uranophane.J.L.J.

ERRATUM

Towarda practicalplagioclase-rnuscovite thermometer by NathanL. Greenand StevenI. Usdansky(v. 71, p. I 109-lI 17).Page 1 I 1l: TheequationforIintheright- hand column containsa misplacedparenthesis. The followingequation should therefore be substituted:

T: 119456A+ t22308+ 27320C+ l88lOD+ 8473E + 28226F- 65407G+ 65305.4H- 2087.6587+ P(-0.0431- 0.456A+ 0.66538+ 0.364C+ 0.364D + 2.ll2lc + 0.9699m1/(7.5805- 8.3147 ln K" - t.6544A- 0.71048+ 10.3C+ 10.3D- t14.t04G + r2.5365m.