American Mineralogist, Volume 78, pages 672-678, 1993 NEW MINERAL NAMES. JOHN L. JAMBOR CANMET,555 BoothStreet,Ottawa,OntarioKIA OG1,Canada ERNST A. J. BURKE Instituut voor Aardwetenschappen, Vrije Universiteite, De Boelelaan 1085, 1081 HV, Amsterdam, The Netherlands EDWARD S. GREW Department of Geological Sciences, University of Maine, Orono, Maine 04469, U.S.A. JACEK PUZIEWICZ Institute of Geological Sciences, University of Wroclaw, Cybulskiego 30, 50-205 Wroclaw, Poland Arsenoflorencite-(La), arsenoflorencite-(N d) The mineral abstracted previously as unnamed mono- B. Scharm, M. Scharmova, P. Sulovsky, P. Kiihn (1991) clinic tobermorite (Am. Mineral., 77, p. 451, 1992) has Philipsbornite, arsenoflorencite-(La), and arsenoflor- been approved as the mineral clinotobermorite. The ideal encite-(Nd) from the uranium district in northern Bo- formula is CasSi6 (O,OH)18. 5H20, and Drneas= 2.58, Deale hemia, Czechoslovakia. Casopis pro Mineral. Geol., = 2.69 glcm3. Type material is in the National Science 36(2-3), 103-113. Museum, Tokyo, Japan. The new name is an allusion to the mineral being the monoclinic polymorph of tober- Electron microprobe analyses gave La203 12.99, 4.63, morite. J.L.J. Ce203 1.32, 3.12, Pr203 0.58, 1.65, Nd203 0.95, 8.65, Sm203 -, 1.30, SrO 7.27, -, CaO 1.01,0.45, BaO -,4.87, PbO -, 2.51, Al203 26.42, 23.29, Fe203 0.80, 3.76, As20S 31.05, 34.19, P20S 2.84, 1.94, S03 5.03, 0.60, H20 (calc. Franklinphilite* for 60H) 9.74, 9.04, sums 100 wt%, corresponding to P.J. Dunn, D.R. Peacor, Shu-Chun Su (1992) Franklin- (La0.442 CeO.044 Pr 0.020 N do.031 Sr 0.389 CaO.100)~ 1.026(AI2.87 s- philite, the manganese analog of stilpnomelane, from )Feo.os6)~2.931[(As04)1.499(P04)0.22iS04)0.348]~2.069(OH6 and to Franklin, New Jersey. Mineral. Record, 23, 465-468. (N dO.307Lao.170CeO.114Pr 0.060Smo.04sBao.190Pbo.067Cao.047 )~1.000- Electron microprobe analysis gave Si02 44.0, Al203 3.6, (AI2.731 FeO.282)~3.013[(As04)1.779(P04)0.164(S04)0.044]~1.98iOH)6, Fe203 7.8, MgO 6.4, K20 1.5, Na20 0.4, ZnO 5.9, MnO ideally LaAI3(As04)iOH)6 and NdAllAs04)iOH)6, which 22.3, H20 (by difference) 8.1, sum 100 wt%, correspond- are the La-dominant and Nd-dominant members of arse- ing to (K2.64Nal.07)~2.71(Mn26.08Mg13.18Zn6.02Feth)~48(Si60.77- noflorencite. The first occurs as the cores of zoned crystals AIs.86Fet!8)~72[0163.2S(OH)S2.77]~216.nH20, ideally K4Mn48- with florencite-(Ce); also as 30-JLm irregular aggregates (Si,A1)72(O,OH)216.nH20 where n ~ 6. The mineral is the with arsenogoyazite, showing mutual compositional gra- isostructural Mn analogue of stilpnomelane. Occurs as dations; as the outer zones of microspherical grains, 5- radial aggregates of dark brown platy crystals; light brown 10 JLm in diameter, containing crandallite cores; and as streak, vitreous to slightly resinous luster, H = 4, imper- complex, nearly isometric grains that also contain cran- fect {001} cleavage, brittle, nonfluorescent, Drneas= 2.6- dallite and arsenoflorencite-(Nd). The minerals occur in 2.8, Deale= 2.66 glcm3 with Z = 3/8.Optically transparent drill cores from the Holicky, Stniz, and Osecna uranifer- to translucent, biaxial negative, a = 1.545(5), (3= 1.583(3), ous deposits of north em Bohemia, Czech Republic, mainly "y= 1.583(3), 2 Vrneas= 10(3)0, 2 Veale= 00; X 1\ (001) = as a cement in the host Cretaceous sandstones. J .L.J. --60, X = pale yellow, Y = Z = deep brown. Electron diffraction patterns revealed an hkO net similar to that of stilpnomelane, which is triclinic but has a pseudoortho- Clinotobermorite* hexagonal cell; by analogy with this cell, a = 5.521(4), b v. Henmi, I. Kusachi (1992) Clinotobermorite, = 9.560(6), c = 36.57 A. Strongest lines of the powder pattern (114.6-mm Gandolfi camera, FeKa radiation) are CasSi6 (O,OH)18. 5H20, a new mineral from Fuka, Oka- yama Prefecture, Japan. Mineral. Mag., 56, 353-358. 12.3( 100,003), 2.737(30,202), 2.5 83(40,205), 2.362(30, 208), 1.594(30,060), and 1.580(30,063). The mineral occurs with friedelite in a centimeter-wide vein that crosscuts a breccia of aegirine, calcite, chamosite, and interlayered 7- and 14-A phyllosilicates in a specimen * Before publication, minerals marked with an asterisk were approved by the Commission on New Minerals and Mineral from the Buckwheat mine dump at Franklin, Sussex Names, International Mineralogical Association. County, New Jersey; also with nelenite, rhodonite, and 0003-004 X/9 3/0 506-06 72$02.00 672 JAMBOR ET AL.: NEW MINERAL NAMES 673 tirodite in another assemblage. The name is a combina- versity Mineralogical Museum at Wiirzburg, Germany, tion for the type locality (Franklin) and the Greek word and Kiel, Germany. J .L.J. for friend (phi/os). Type material is in the Harvard Min- eralogical Museum. J.L.J. Unnamed (Ir,Pt,Rh)S2 and (Pt,Ir)2(As,S)3 I.Ya. Nekrasov, V.V. Ivanov, A.M. Lennikov, R.A. Krasnogorite, krasnoselskite Oktiabrskij, V.I. Sapin, V.I. Taskaev, B.L. Zalishchak, B.V.Chesnokov,L.F.Bazhenova,E.P.Shcherbakova,T.A. V.V. Khitrov (1991) New data on platinum mineral- Michal, T.N. Deriabina (1988) New minerals from the ization of alkaline-ultrabasic concentrically zoned mas- burned dumps of the Chelyabinsk coal basin. In Min- sifs of the Far East. Doklady Akad. Nauk SSSR, 320(3), eralogy, technogenesis, and mineral-resource complexes 705-709 (in Russian). of the Urals. Akad. Nauk SSSR-Uralskoe Otdel., 5-31 Microprobe analysis of a rim of 3-10 JLmon laurite, in (in Russian). chromite-bearing dunite of the Chadskij massif (eastern Krasnogorite W03 and krasnoselskite CoW04 were margin of the Aldan Shield, Siberia, Russia) gave Pt 13.08, identified by X-ray study. They occur as pseudomorphs Pd 0.34, Rh 4.94, Ir 46.47, Os 2.62, Fe 2.93, Cu 1.08, S after hard alloy VK8 (92°/0 WC, 8°1oCo) on the plates of 27.00, As 0.15, sum 98.62 (98.61) wtOlo,corresponding to the cutting element of a drilling machine found in burned (Iro.6oPto.lsRho.120so.o4)};o.94S2.os.Microhardness 615 kglmm2. rocks of the Krasnoselskaya mine in Krasnogorsk, Che- Microprobe analysis of 25-JLm subhedral platy inter- lyabinsk coal basin, southern Urals, Russia. The pseu- growths in isoferroplatinum occurring in dunites of the domorphs are greenish or bluish gray, luster dull, bluish Konderskij massif (eastern margin of the Aldan Shield, gray streak, conchoidal or splintery fracture, H = --4, Dmeas Siberia, Russia) gave Pt 51.62, Rh 1.08, Ir 10.57, Os 0.28, = 6.62 glcm3. Brittle, but can be polished. Cu 0.16, S 2.20, As 33.14, sum 99.05 wtOlo,corresponding Krasnogorite is orthorhombic, a = 7.39(1), b = 7.53(1), to (Ptl.s7Iro.33Rho.o6)};1.96(As2.63S0.4o)};3.03.Microhardness 500 c = 3.84(1) A. Strongest lines of the X-ray powder pattern kglmm2. are 3.848(100,001), 3.769(100,020), 3.656(86,200), and Discussion. IrS2 is known as orthorhombic and as cubic 2.625(32,220). synthetic phases. Pt2 (As,S)3 has also been reported from Krasnoselskite is monoclinic, a = 4.95(1), b = 5.68(1), placers near Vladivostok, Russia (Am. Mineral., 78, p. c = 4.70(1) A, (3 ~ 90.00. Strongest lines of the X-ray 233, 1993). J.P. powder pattern are 3.739(41,110), 3.611(23,011), Unnamed Pd PGM 2.916(77,111), and 1.695(20,122). Discussion. Neither name has been submitted to the T.L. Grokhovskaya, V.V. Distler, S.F. Klyunin, A.A. Za- CNMMN for approval. J.P. kharov, I.P. Laputina (1992) Low-sulfide platinum group mineralization of the Lukkulaisvaara pluton, northern Karelia. Geologiya Rudnykh Mestorozhdeniy, 1992, no. Liebauite* 2, 32-50 (English translation in Internat. Geol. Review, M.H. Zoller, E. Tillmanns (1992) Liebauite, Ca3CusSi9026: 34(5), 503-520). A new silicate mineral with 14er single chain. Zeits. Kotulskite, merenskyite, michenerite, moncheite, te- Kristallogr., 200, 115-126. largpalite, sopcheite, majakite, mertieite II, isomertieite, Electron microprobe analysis gave CaO 15.0, CuO stillwaterite, sperry lite, braggite, cooperite, tulameenite, 34.9, Si02 48.5, sum 98.4 wtOlo,corresponding to Ca2.99- hollingworthite, irarsite, arsenopalladinite, and the fol- CU4.91Si9.os026.Occurs as bluish green transparent crystals lowing unnamed platinum-group minerals (PGM) occur <0.03 mm, vitreous luster, H = 5-6, Deale= 3.62 glcm3 in the Precambrian Lukkulaisvaara layered ultramafic with Z = 4. Optically biaxial positive, a = 1.722(1), (3= pluton on the Russian side of the Russian-Finnish border. 1.723(1), 'Y= 1.734(1), 2V= 72.80. Single-crystal X-ray Pd2(Sn,Sb) structure study (R = 0.046) gave monoclinic symmetry, space group C2/c, a = 10.160(1), b = 10.001(1), c = Two analyses gave Pt 0.16, 0.5, Pd 63.56, 63.01, As 19.973(2) A, {3= 91.56(2)0. Strongest lines of the powder 0.08, 0.01, Ag 0.93, 0.68, Sb 16.55, 17.45, Sn 16.43, 15.07, pattern (57.3-mm Debye-Scherrer) are 7.13(60,110), 6.70- Te 0.60, 0.19, Bi 0.25, 0.70, sum 98.56, 97.26 wtO/o.Occurs (70,111,111), 3.12(90,131,131), 3.00(100,312,132,132, as cream-colored, weakly anisotropic grains of < 20 JLm 116), 2.45(60,226), and 2.41(70,226); the line at 3.00 with mertieite II, merenskyite, sopcheite, and hessite in overlaps with that of associated cuprorivaite, but lealcfor rock-forming silicates and in chalcopyrite-bearing sulfide 116 is 91.