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Home , Alarsite, Colemanite, Weloganite

AmericanMineralogist, Volume 80,pages 1328-1333,1995

NEW NAMES*

JonN L. Janson Department of Earth Sciences,University of Waterloo, Waterloo, Ontario N2L 3Gl, Canada J.lcnx Pvztnwtcz Institute of Geological Sciences,University of Wroclaw, Cybulskiego30, 50-205 Wroclaw, Poland ANunnw C. Ronnnrs Geological Survey of Canada, 601 Booth Street,Ottawa, Ontario KlA 0E8, Canada

Alarsite* rhtinite, but the synthetic phaseis much higher in Ti and T.F. Semenova,L.P. Vergasova,S.K. Filatov, V.V. An- lacks Fe. anev (1994) Alarsite AlAsOo: A new mineral from vol- Discussion.Known only as a synthetic product; not a canic exhalations.Doklady Akad. Nauk, 338(4),501- valid mineral name. J.L.J. 505 (in Russian). Electron microprobe analysis (averageof 20) gave AlrO. 31.98,FerO, 0.60, CuO 0.54,AsrO, 66.71,sum 99.83 Crawfordite* wt0/0,corresponding to Al, ooFefig,Cufrj,AsonuOo.Occurs as A.P. Khomyakov, L.I. Polezhaeva,E.V. Sokolova(1994) colorlessaggregates with yellowish, pale green,and bluish Crawfordite NarSr(POo)(COr):A new mineral from the tints, commonly containing powdery or bradleyite group. Zapiski Vseross. Mineral. Obshch., and gaseousinclusions; also as equant grains to 0.3 mm 123(3),4l -49 (in Russian). in diameter, some with poorly developed faces.Vitreous Electron microprobe analysis (averageof two grains) luster, white , brittle, no , VHNro: 449 gaveNarO 31.83,KrO 0.22,CaO 1.45,SrO 27.42,P2O5 (336-480),D-""" : 3.32(l),D*r.: 3.34g,/cm3 for Z : 3. 23.64, CO2(calculatedfrom X-ray structural data) 14.47, Stableat atmospheric conditions; soluble in dilute acids. sum 99.03wt0/0, corresponding to Na. or(Sro,,Na" ,oCaoor- Colorless in transmitted light, uniaxial positive, c.r : &0,)P,o,C,ooOroo,ideally NarSr(POo)(COr).Occurs as 1.596(1),r : 1.608(l).The X-ray powderpattern is iden- colorless,transparent to translucent irregular grains to I tical to that of synthetic AlAsOo; by analogy, trigonal mm in diameter, dull vitreous luster, conchoidal , symmetry,space group P3r2l or P3221,a: 5.031(l),c H:3, bright greenishyellow fluorescencein ultraviolet : 11.226(6)A as refined from the diffractometer pattern light, readily soluble in 100/oHCI and in citric acid at (CuKa; 3l lines given) with strongestlines 4.36(20,100), of room temperature,D-""" : 3.05,Dd": 3.08 g/cm3for Z 4.06(3l,l0l), 3.442(100,r02),2.359(15,104), and : 2. The infrared spectrum shows absorption bands at 1.873(16,1l4). 1445, 1055,and 575 cm-'. Optically biaxial negative,a The mineral occurs in the fumarolic deposits of the : 1.520(2),P : 1.564(2),y : 1.565(2),2V^u" : 20(l), Great Tolbachik fissureextrusion, Kamchatka Peninsula, 2V*rc: l7o, X x l, Y x a, Z = B. Single-crystalX-ray Russia, and is associated with , fedotovite, study showed the mineral to be monoclinic, spacegroup kluychevskite, lammerite, hematite, tenorite, Al- and P2,,a:9.187(3), b:6.707(2),c:5.279(l) A, B: K-containing sulfates,and sparsenabokoite and atlasov- 89.98(3F.Strongest lines ofthe powderpattern (68 given; ite. The name is for the composition (aluminum arse- 57 mm camera,Fe radiation) are 2.708(100,220,121,121), nate). Type material is at the Mining Museum of the 2.648(90,30t,301,002),2.t72(100,410,130), 1.891(90, Mining Institute, Saint Petersburg,Russia. J.P. 222,222),and 1.415(70,042).The structureof the min- eral consistsoftwo layers parallel to (100), with one con- Baykovite taining Na octahedra and tetrahedra and the other with A.V. Arakcheeva (1995) of the baykov- discrete POo and CO, groups, Na octahedra,and Sr oc- ite mineral. Crystallography Reports, 40, 220-227 . tagons. The mineral occurs in pegmatitesof the Khibiny mas- The name baykovite had been applied previously to a sif, Kola Peninsula, Russia, associatedwith potassium brown phasethat occurs in Ti-bearing silicate slags.Sin- feldspar,nepheline, sodalite, aegirine (main rock-forming gle-crystal X-ray structure study of a synthetic crystal ), plus pectolite, astrophyllite, barytolampro- showedit to be triclinic and a member of the aenigmatite phyllite, shcherbakovite, vuonnemite, kazakovite, er- structural group; the composition is similar to that of shovite, chkalovite, natrite, villiaumite, and rasvumite. The name is for Scottish chemist A. Crawford (1748- * Before publication, minerals marked with an asterisk were 1795), who discovered the Sr salts. Type material is at approved by the Commission on New Minerals and Mineral the Fersman Mineralogical Museum, Moscow, Russia. Names, International Mineralogical Association. J.P. 0003-004x/95 / r I 12-1328$02.00 r328 JAMBOR ET AL.: NEW MINERAL NAMES 1329

Makovickyite* Discussion.Microprobe analysisis necessary.The new L. Z k, J. Fryda, W.G. Mumme, W.H. Paar (1994)Ma- name should not have been introduced. J.P. kovickyite,Ag,rBirrSn, from Baita Bihorului,Roma- nia: The aP natural mineral member of the pavonite series.Neues Mineral. Abh.. 168. 147-169. Jahrb. Shuangfengite* The mineral at Baita Bihorului (formerly Rezb6nya) Zuxiang Yu (1994) Shuangfengite:A new iridium bitel- occurs as anhedral grains up to 2 mm, consisting of alter- luride. Acta Mineral. Sinica, l4(4),322-326 (in Chi- nating lamellae of Cu-rich and Cu-poor phases;also found nese,English abs.). at Felbertal, Austria, as a singlehomogeneous grain. Gray in with PGM as color, opaque, metallic luster, no cleavage, VHNso_too The mineral occurs association other : 210-221 for intergrowths. Light gray in reflected aggregatesup to 0.5 mm in diameter, and veinlets up to placer light, no bireflectance,pronounced anisotropism in gray 0. I mm wide and I mm long, in concentratesand near the village of tones,D"u," :6.70 (Cupoor) to6.66 g/cm3(Curich).Elec- crushed ores from a chromite deposit 190 km north-northeast of Beijing, tron microprobe analysesof the Cu-poor and Cu-rich la- Shuangfeng,about People'sRepublic of China. Black color and streak, 11 : mellae and the Felbertal grain gave,respectively, Cu4.37 , VHN2r: 108(86-l6l), perfect cleavage,brit- 6.47,0.53, Ag 5.37,4.17, 5.50, Pb 3.50,8.20, 12.93, Bi 3, {0001} : g,/cm3for Z : l. Electron microprobe 68.81,63.33,62.70, Sb 0.09,0.t2,-, S 17.75,t7.42, tle, D-" 10.14 (average range nine listed) gave Ir 40.3 77.97,5e0.40,0.48,0.17, Te 0.69,0.50,-,sum 100.98, analyses and of (34.0-42.7),Pt 1.2 (r.4-s.8), Os 0.1 (0.0-0.7),Rh 0.0 100.69, 99.80 wto/0,corresponding to AgorrCu,orPbo.rr- (0.0-0.1),Cu 0.2 (0.1-0.3),Te 56.7(54.8-57.9), S 0.3 Bisresbo ,oSr rrSeo orTeo or, Ago urCu, 62Pb0 63Bi4 82sbo orS, uo- (0.2-0.5),Bi 0.4 (0.3-0.8),sum 99.2 (97.8-100.9)wt0/0, Seo,oTeoou,and AgorrCuo,oPb,o.BionrSr'Seooo, ideally correspondingto (Iro (Te, Ag,oBiroAgorBi3sse,which is the aP pavonite homolog. nrPtoorCuo o, )ro ,, ,rSoooBio o, )", or, ideally IrTer. In reflected light, bright yellowish white with Single-crystal X-ray study indicated monoclinic sym- a bluish tint, bireflectanceand pleochroism not observed metry, space group C2/m; cell dimensions for the re- in air or oil; anisotropism moderately weak, with bluish spectiveanalyses given aboveate a : 13.37,13.3713.83, and yellowish tints. Reflectancepercentages in air (WTiC b : 4.05,4.05,4.04, c : 14.7l,14.94, 14.72 A, P : SS.S, standard) are given for R" and R. in l0 nm steps from 100.5, 97.5". Strongestlines of the powder pattern are 400 to 700 nm: 45.5, 4L6 (470 nm); 48.3, 40.4 (540); 3.6 3 ( 5 0,004, 2 0 3), 3.4 8 5 ( 5 0, | | 2), 2.968 (30,20 4,3 | r), 49.0,41.| (590);51.2, 45.2(650). By analogywith PtTe,, 2.850(100,205,31l), 2.272(40,115,404), 2.r17(30, hexagonalsymmetry, space group P3ml, a: 3.933(5),c 5 I 3,601),and 2.0l0(30,514,602,020). : 5.390(5)A as refined from the powder pattern; strong- The mineral occurswith hammarite, bismuthinite, and lines(21 lineslisted) are 2.85(100,101), 2.10(80,102), other Bi- and Cu-containing sulfides (including possibly est 1.95(60,120),1.580(70,103), and 1.160(60,212).The new the 3P and 6P homologs, for which microprobe analyses name is for locality. Type material is in the Geological are given) in diopside-chondrodite-grossular-andradite the Museum Beijing.J.L.J. skarns(Romania), and with sulfosaltsand sulfidesin the of China, tungsten deposit at Felbertal, Austria. The new name is for Emil Makovicky of the University of Copenhagen, Denmark. Type material is in the Mineralogical Collec- Sodium meta-autunite,*sodium autunite tion of the Faculty of Science,Charles University, Praha, A.A. Tschernikov, N.I. Organova (1994) Sodium autun- and in the National Museum, Praha (Prague). ite and sodium meta-autunite. Doklady Akad. Nauk, Discussion.Initial data defining the unnamed mineral 338(3),368-371 (in Russian). were abstractedin Am. Mineral.. 76, 669-670 (1991). Fully hydrated sodium autunite contains not less than J.L.J. 14-16 moleculesof HrO (analyzedby weight loss) and hasthe formula Nar(UO,),(POo)r'10-l6HrO. It is stable only under underground mine conditions and decompos- Protoantigorite esinto sodium meta-autuniteNar(UO2)r(PO4)r' 6-8HrO N.N. Bryantschaninova, L.A. Yanulova, A.B. Makeev immediately after transportation to the surface.Physical (1993) Low-hydrate calcic serpentine from ultrabasic properties of sodium autunite and X-ray powder patterns rocks of the Syumkeuskmassif. Trudy Inst. Geol. Komi of both are given. The unit-cell parameters of sodium Nauchn. CentraUral Otd. Ross.Akad. Nauk. 31. 45- autunite (sample hydrated in water for a few days) are a 52 (in Russian). : 6.976(4),c : 8.99(l) A, whereassodium meta-autunite Chemical analysis (wet?) of a concentrateof a serpen- has a : 6.996(2)and c : 8.64(l), spacegroup P4/nmm. tinelike mineral from the rocks of the Syumkeuskmassif Discussion. The proposal that the mineral containing (Urals, Russia)indicated the presenceof Ca (3.29) and a 6-8 molecules of HrO be called sodium meta-autunite low H,O content (4.69 wto/o).X-ray data showed that the rather than sodium autunite was approved by CNMMN material was impure. Infrared, TGA, and physical prop- in 1987. The reintroduction of the name sodium autunite erties ofthe studied concentrateare siven. for the higher hydrate thus constitutes a new name, a l 330 JAMBOR ET AL.: NEW MINERAL NAMES resurrectionthat has not been submitted to the CNMMN 172-27 4 (rangeof seven),D-*" : | 1.7- | 1.9, D : | | .78 "d. for approval. J.P. g/cm3 for Z : 2. Readily soluble in aqua regia, slowly soluble in HCI or HNOr. In reflected light, silver white with a slight yellowish tint, faint bireflectance, readily Vicanite{Ce)* oxidizes to gray or black in air; distinct anisotropism, A. Maras, G.C. Parodi, G. Della Ventura, D. Ohnenstet- with polarization colors light yellow with a brownish tint. ter (1995) Vicanite-(Ce): A new Ca-Th-REE borosili- Reflectancepercentages (SiC standard) are given in 20 cate from the Vico volcanic district (I.atium. Italv). Eur. nm steps from 400 to 700 nm, inclusive; ar 460, 540, J. Mineral.. 7. 439-446. 580,and 640 nm, R,,and Ro, are 63.6, 63.7;76.1 ,74.3; powder pattern (dif- The mineral occurs as yellowish green aggregatesin 79.9, 77.4; 82.5, 79.4. The X-ray good miarolitic cavities in ejectaof syenitic composition at Tre fractometer, CuKa radiation) is in agreementwith Croci, Vetrella, Viterbo province, Latium, Italy. The ag- that of synthetic AuSn; by analogy, the mineral is hex- g.roup : gregatesconsist of anhedral grains and, rarely, euhedral agonal,space P6r/mmc, a: 4.316(l), c 5.510(2) powder pattern prisms to 0.3 mm, with pyramidal termination. Trans- A. Strongestlines of the (20 lines listed) parent, vitreous luster, white streak, nonfluorescent,.FI : arc 3.726(34,100),3.087(38,101), 2.218(100,102), 5-6, D-*. : >4.2, D^.: 4.73 g/cm3for Z -- 3. Optically 2.159(57,l10), and 1.546(31,202). uniaxial negative,a : 1.757(2),e : 1.722(2),nonpleo- The mineral occurs with irregular boundaries in an in- gold. chroic. Electron microprobe analysis gave SiO, 13.82, terlocking texture with The origin is thought to be gold. AlrO30.16, TiOr 0.l4, PrOs0.38, AsrOr4.49, FerO, 1.66, by in situ replacement of placer The new name is CaO 17.07,NarO 0.14, ThO2 18.24,UO2 1.96,La,2O3 for the river at the locality. Type material is in the Geo- 12.01,CerO, l4.4l,PrrO,2.77, NdrO3 1.77,BrO, (calc.) logical Museum of China, Beijing, and in the China Uni- 5.27,F 7.50,O = F 3.16,sum 98.65wto/0, correspond- versity of Geosciences,Beijing. J.L.J. ing to (Ca,orC er rrLarrrTh,,rPro ooNdo rr lJo ,n)",, o, (As3.tu- Po,o)",oo(AsfijoNa",r)*ou(Fe3l7TioosALo8)>o 70Si60784(036 57- (Rh-Ir,Ni-Fe)r-S, Rh,,Se F,oor)"0r,valences and partitioning of As are on the basis of the X-ray structure, from which the simplified formula N.D. Tolstykh, A.P. Krivenko (1994) On the composi- platinum group is (Ca,REE,Th),rAss+(AsfijNao r)Fe3+SiuB4O4.F7. Rhom- tion of sulfides containing elements. bohedral symmetry, spacegroup R3m, a : 10.795(l), Zapiski Vseross.Mineral. Obshch., 123(2),4l-49 (in Russian). c : 27.336(l A as refined from a Gandolfi powder pat- tern (114 mm, CuKa radiation) with strongestlines of Two unnamed minerals occur as inclusions in riverbed 7.7 0(5 0, 0 I 2), 4.42(50,202),3. | 3(50,2| 4), 2.993(t 00,027), samples containing native osmium, iridium, and ruthe- 2.950(7 0,303), 2.698(50,220),1.839(50,3.0. I 2), 1.802 nium from the Sayan Mountains and Gornaya Shoria, (50,2.0.I 4), 1.686(50,057),and 1.572(50,3.0. I 5). Siberia, Russia. Seven electron microprobe analysesof The new name alludes to the type locality, the Vican one mineral gaveIr 4.78-44.68,Rh 0.39-29.78,Os 0.00- volcanic district. The type specimen is in the Museo di 0.68,Ru 0.00-0.07,Pt 0.00-1.91,Pd 0.00,Fe 11.52- Mineralogia, Universiti di Roma "La Sapienza,"Rome, | 5.24,Cu 2.33-6.29,Ni 8.90-I 8.70,S 25.I 5-30.06,sum Italy. J.L.J. 97.50-101.78wto/o; the analysiswith the highestformula Rh correspondsto (Rhorrlro or)"oru(Nio roFeo rrCuo oo)"0 urS; that for highestformula Ir is (Ir'roRhoo,).r,(FeorrNio, Yuanjiangite* Cuo ,r)"0 u,S; also (Iro ,Rho 0ePt00r)r0 3r (Nio roFeo rrCuo or)"6 52 Lichang Chen, Cuiqing Tang, Jianhong Zhang, Zhenyun S. These results are generalizedas Me,-"S. Analysis of Liu (199a) Yuanjiangite: A new auriferous and stan- anothermineral gave Ir 2.38,Rh 64.04,Ru 1.49,Fe0.99, niferous mineral. Acta PetrologicaMineralogica, l3(3), Cu 1.49,Ni 6.14,S 20.63,corresponding to (RhruNi,o- 232-238 (in Chinese,English abs.). Cuo.FeorRuo rlro r)",,Sr r. p. The mineral occurs with placer gold in Middle Pleis- Discussion. See the abstracts in Am Mineral., 76, (1991) p. (1994) previous tocene glaciofluvial sandy gravel in the Yuanjiang River 1437 and 79, l2ll for reports near Yuanlin, Hunan Province, People'sRepublic of Chi- of Me,-"S. The formula of the second mineral may be prassoite. na. The averageand range of the seven electron micro- close to that of so-called J.P. probe analyseslisted (to three decimal places) are Au Zn-Cd-ln sulfides 62.73t (60.529-64.580),pb 0.088 (0.003-0.309),Ag 0.091 (0.001-0.490),sum 99.972(99.945-99.999) wto/o, V.A. Kovalenker, LP. Laputina, V.S. Znamenskii, I.A. correspondingto Au,.oorSnonrrPbo oo,Ago oor, ideally AuSn. Zotov (1993) Indium mineralization of the Great Kuril Occurs as crystalline granular aggregatesthat form nod- Island arc. Geol. Ore Deposits, 35(6), 491-495 (trans- ular, pseudobotryoidal forms to 2 mm, with individual lated from Geol. Rudnykh Mestorozhdenii, 35, 547- grains generally <5 pm; also rarely as slightly larger hex- ss2\. agonal prisms in drusy cavities. Silver white color, opaque, Sulfide grains up to dozensof micrometers in size form metallic luster, black streak, slightly ductile, VHN,, : powdery aggregatesamidst the cracksand pores ofbasalts JAMBOR ET AL.: NEW MINERAL NAMES l33r affected by high-temperature (500-940 'C), predomi- anatase, and corundum. An extremely hard, clear to nantly magmatic-hydrothermal fluids at Kudryavyi Vol- cloudy, glassymaterial in interstices consistsof an opti- cano on Iturup Island, one of the Kuril Islands. Electron cally isotropic phase that is crosscut by, and exhibits small microprobe analyses(15 listed) show that sphaleriteJike areas of incipient crystallization to, anisotropic areas phasescontain Dp to 22.28 wto/oCd and up to 14.90 wto/o identified as comndum. Electron microprobe analysis of In, and three analysesare for grains much higher in In. the isotropicphase gave 1^120,97,SiO, <0.2, TiO, <0.2, The flrst has the compositionFe 1.80,Cu 0.90 2n24.72, FerO, 3 wt0/0.The Debye-ScherrerX-ray powder pattern Cd 15.25,1n25.83, S 28.82,sum 97.32wt0/0, correspond- has lines at 2.38(3ll), 2.28(222),2.13(321), 1.99(400), ingto Zn,nrFeorrCuo ,,Cd, orln,,oSu ro, ideally ZnrCdlnrSr. and 1.39 A (++O), corresponding to the pattern for The secondis Fe 2.56,Cu 0.48,Zn 8.04,Cd 17.80,In 1-alumina.J.L.J. 42.23,S 28.42,sum 99.53 wt0/0,correspondingto Znoro- FeoruCuo.ooCdnnolnrorSror,ideally ZnCdInrSr, perhaps isostructural with the compound ZnrlnrSr, which has FeSrOr, (Fer.rPbo.r)SrO, hexagonal symmetry. The third analysis is for a sulfide H. Kucha, H.L. Barnes(1995) Compoundswith mixed derived from present-daygaseous jets at the volcano: Fe and intermediate sulfur valences in pyrite from the 2.07, Cu 0.40,Zn 2.12,Cd 18.34,In 48.25,S 27.70,sum Amelia mine, southwest Wisconsin. Mineralium De- 98.88 wto/0, corresponding to Zno,rFeo,rCuoo.Cdorr- posita,30, 78-8 l. In,rrSrnr, ideally This CdInrSo. mineral may be the Cd Black-gray patchy areas within stalactitic and banded analogofindite FeInrSo; the Cd-Fe synthetic counterparts pyrite-marcasite consist of mixtures of pyrite-marcasite are known to be isostructural and distinct from ZnInrSo. and thiosulfates, as determined by electron microprobe J.L.J. analysis in which the valence state of S is related to the wavelength shifts in the peaks for S. Within the patchy mixtures, analysis of a homogeneous area, 40-50 pm AgHgSb' AgoSbrS, across,gave Fe 33.47, Co 0.31, Ni 0.27, Zn 0.03, Ag N.N. Mozgova,Yu.S. Borodaev,A.V. Efimov, S.M. San- <0.01, Pb 1.07,As 0.09,S 36.90,O by difference27.86, domirskaya, S.N. Nenasheva,A.P. Lisitsyn, Y.A. Bog- sum 100 wto/0,corresponding to Fe,eal6CoesoelNies6sl- danov, K.G. Murav'ev (1993) Silver minerals in oce- PbooonoZno o*rAso *r,S, ooooO,orur, ideally FeSrOr.Analysis anic hydrothermal ore occurrences (Manus and of a second homogeneousarea, 50 pm across, gave Fe Woodlark basins,Papua New Guinea region).Geol. Ore s0.01, Deposits,35(4),297-306 (translatedfrom Geol. Rud- 19.02,Ag 0.04, Pb 28.84, Co-Ni-Zn-As each S nyk Mestorozhdenii, 35, 333-343). 22.82, O 27.50 by difference 29.28) wto/o,corresponding to Fe,orruAgo 0or6Pbo j867S3 ooooO, ,roo, close to (Fe,Pb)rSrOr. Finely dispersed, Ag-bearing sulfides occur within a J.L.J. barite-opal cone, 1.5 m high, that was recoveredfrom the caldera of Mount Franklin, a hydrothermally active sub- marine volcano offthe southern tip of Papua New Guin- Ca[B,O.(OH),] ea. Mineral A is strongly anisotropic, red internal reflec- N.A. Yamnova, Yu.K. Egorov-Tismenko, S.V. Malinko, prismatic, tions, elongate and has an electron microprobe D.Yu. Pushcharovskii, G.I. Dorokhova (1994) Crystal compositionof 4g21.07, Hg 37.10,Sb 20.29,As 2.35, structure of a new natural hydroborate S 19.05,sum 99.85 w0/0,corresponding to Ag,ooHgorr- Ca[BrOo(OH).].Crystallography Reports, 39(6), 905- (Sbo.rrAso,u)r,o,Sroo,which may be the Sb analogof laf- 907. fittite, AgHgAsSr. Mineral B is elongate prismatic to The mineral occurs with colemanite, howlite, veatch- equanUbluish color, red internal reflections, and similar ite, , probertite, and "studenicite" in drill cores to pyrargyrite in reflected light. Electron microprobe from a Miocene borate deposit intersected at 100 m depth analysis (averageof four listed) gave Ag 53.06, Cu 0.08, near Belgrade (Serbia, Yugoslavia). Colorless, transpar- Sb 24.78,As 2.38,S 19.63,sum 99.93wt0/0, correspond- ent, vitreous luster, parallel to radial aggregates,H : 6, ing to (Ag, ooCuoo,)(Sb, urAso ,u)", nrS, or. Minerals A and B perfect cleavagealong twinning common, D^*: are associatedwith one another and with pyrargyrite, [001], 2.49,D"^.:2.54 g,/cm3for Z: 4. Chemicalanalysis gave miargyrite, and freibergite. J.L.J. SiOr0.20, AlrO3 0.03, FerOr 0.20, MnO 0.01,CaO 30.56, MgO 0.02,SrO 0.01,NarO 0.05,&O 0.07,B2O3 55.44, = x-alumina Cl 0.21, HrO+ 13.36,O Cl 0.05, sum 100.11wt0/0. Optically biaxial positive, a : 1.573,0 : 1.586, r : B. R.J. (1995) Singh, Gilkes The natural occurrence of 1.626,2V: 58'. Single-crystalX-ray structurestudy (R in lateritic pisolites. Clay Minerals, 30, 39- 1-alumina : 0.035) indicated monoclinic symmetry, space group 44. -- P2,/a,a: 8.386(3),b 8.142(4),c:7.249(3) L, P: Dense pisolites in laterites at the Darling Range of 98.33(3)".Structurally similar to colemanite. Western Australia consist of goethite, hematite, maghe- Discussion. The associatedmineral "studenicite" ap- mite, and minor amounts of quartz, gibbsite, bOhmite, pears to be a mistranslation of studenitsite, a new ap- r332 JAMBOR ET AL.: NEW MINERAL NAMES proved name for which a full description has not been New Data published but which correspondsto the unnamed borate as abstractedin Am. Mineral.,79, p. 1213, 1994.J.L.J. Chevkinite T. Imaoka, K. Nakashima (1994) Chevkinite in syenites from Cape Ashizuiri, Shikoku Island, Japan. Neues Trigonal analog of donnayite-(Y) Jahrb. Mineral. Mon., 358-366. Ching lji Le Tjy, E.A. Pobedimskaya,T.N. Nadezhina, Various properties are described for nonmetamict A.P. Khomyakov (1992) Polymorphism of donnayite chevkinite from Shikoku Island. Electron microprobe (Na,REE)Sr(CO3)r.HrO.Moscow University Geol. analysis gave a composition corresponding to (Ce, urr- Bull.,47(5), 60-70. La, oo,Cao unn Nao rn, Tho r, Yo.ou,Euo o,u Dyo o,r)* oo(Ti, oor- Single-crystalX-ray structural study of donnayite-(Y) Fe,ourNbo ,r,Mgo onoCao o.rMno.oo,)", orSio orOrr. from the Khibiny alkaline massif, Kola Peninsula, Rus- Discussion.The formula of chevkinite in compilations predominance po- sia, gavetriclinic symmetry, spacegroup Pl, q,: 8.993(2), is commonly written with Ca in the A sition, but this seemsto be incorrect. Most analysesshow b : 8.985(2),c : 6.780(2)A, o: 116.25(2),P : 102.76, Ce predominance (as indicating mineral r : 60.00(l)'. The electron microprobe composition cor- above), that the should be named chevkinite-(Ce). Some analysesshow a respondsto (Sro,,Na. ooYoru Ceo ro Cao,, Lao,oNdo o, Bao or- predominanceof La (Am. Mineral.,63,499-505, 1978), Dyoo, Gdo o, Pro o, Ero o, Ybo o,)", oo (COr)r. HrO. Occurs as yellow, transparent, well-faceted, wedge-shapedcrystals but chevkinite-(La) is not a formally approved name. to 3 mm. Optically biaxial negative,2V : 10-30', a: J.L.J. 1.57,P : 1.65,y : 1.65,D"a.: 3.42g/cm3 for Z : 3. Isostructural with weloganite. Dzhezkazgznite The trigonal analog forms yellow, transparent portions A.D. Genkin, E.M. Poplavko, A.I. Gorshhov, A.I. Tse- of crystals, mm, which por- to 3 are intergrown with a pin, A.V. Sivtsov (1994) New data on dzhezkazgar celaneous grayish white phase along (0001). Electron ite -rhenium-molybdenum-copperJead sulfide-from microprobe analysis of the yellow phase correspondsto the Dzhezkazgandeposit (Kazakhstan).Geol. Ore De- (Sro,, Na" ouYo ,oCao , n Cgo ,, Laoo, Bao on Ndo o,Gdo o, Dyo or- posits,36(6), 481-489 (translatedfrom Geol. Rudnykh Eroo,Ybo o, Pr. orXCO3)r. HrO. Optically uniaxial negative, Mestorozhdenii, 36, 536-544). c.r: 1.650,e : 1.565.Trigonal symmetry, spacegroup The mineral occurswith bornite, chalcocite,and galena R3m, a: 5.211(l), c : 18.357(7)A, Dor": 3.44(3)g/cm3 in sandstonesthat host the stratiform Dzhezkazgan ore for Z : 3. The structure is characteized by a disordered deposit in central Kazakhstan. Size of the individual grains distribution of Na and REE, whereasin the triclinic poly- is < I pm, but concentrations of the mineral are segre- morph these elements are partly ordered in several po- gated into aggregatesto 0.1 mm. Cream colored and sitions.J.L.J. slightly anisotropic in reflectedlight, VHN',: 206, max- imum reflectances(given in 20 nm stepsfrom 400 to 740) are 34.4 (400), 33.7 (440), 33.5 (480,520),33.3 (560), 32.9 (600),32.3 (640),31.5 (680),and 30.4 (720).The Kr(Na,Li)nCarTirBeoSirrOo mean of 22 electron microprobe analysesgave Re 17.36, Mo 9.86,S 24.33,As 0.34,Cu 23.95,Ag 2.44,Fe 3.05, R.K. Rastsvetaeva,V.G. Evsyunin,A.A. Kashaev(1995) Cl0.26, Co 0.17,Pb 17.85,sum 99.61wto/o; after deduc- Crystal structure of a new natural K,Na,Ca-titanober- yllosilicate. CrystallographyReports, 40, 228-232. tion of bornite impurity, estimated at l7o/o,the calculated formula is Reo_r,Moo' Cu, noPbo' Ago, Feo, Srrr. The The mineral occurs as equant grains, typically 0.5-1.0 analysiswith the highest Re and Mo contents (estimated mm, in the Malomurun massif, Yakutia, Russia. Color- 4.8 volo/obornite impurity) gave Re 22.09, Mo 12.20, S less to light pink, to pink with a brownish hue, I/: 5- 25.02,As 0.32,Cu 17.25,Ag 1.50,Fe 2.40,Cl0.19, Co 5.5, no cleavage;optically biaxial positive,a : 1.630(3), 0. 17, Pb 17.41,sum 98.55 wto/o;after deduction of the : : P 1.675(3),2V 70". Electron microprobe analysis bornite,the formula is ReonuMo,or(Cu,,rAgo,,)r, nr(Pbo..*- gave SiO, 52.56,TiO, 11.42,Al2O3 0.1I, FeO0.42, MnO Feo,rCoo or)"6 er(S. orAso o.Clo oo)"u on, ideally ReMoCurPbSu. 0.05,CaO ll.5l, SrO 1.21,NarO 8.57,K2O 6.86,BeO Electron diffraction pattems showedthe cell to be similar (atomic absorption) 6.75, sum 99.42 wto/o;Li by spec- to that of molybdenite-3Rand to have a: 3.22(3),c: troscopy 0.047 wo/o.Single-crystal X-ray structure study 18.54(3)A..r.r-..r. (R : 0.038) gave orthorhombic symmetry, spacegroup Fddd, a : 14.243(3), b : 13.045(4),c : 33.484(6) A. Hydroxylellestadite Structural formula KrNar rrl-iorrCa, {TirOr[Beo(SiuO, r)J ] ; D-"u,: 2.94(2)-2.98(2),D*n : 2.91(2)g,/cm3 for Z : 8. N.I. Organova,R.K. Rastsvetaeva,O.V. Kuz'mina, G.A. J.L.J. Arapova, M.A. Litsarev, V.L Fin'ko (1994) The crystal JAMBOR ET AL.: NEW MINERAL NAMES l 333

structure of low-symmetry ellestadite in comparison A new chemical analysis of holotype poitevinite gave with other apatite-like structures. Crystallography Re- a composition correspondingto (CuourFeoorZno.or)SOo. ports, 39(2), 234-238. HrO. Rietveld refinementsfor the synthetic seriesFeSOo. Wet-chemical analysis of hydroxylellestadite from a HrO-CuSOo.HrO showeda reduction in symmetry from wollastonite deposit in Cuba gave a composition corre- monoclinic to triclinic beyond 20 wto/oCu. For poitev- inite, the new triclinic cell in space group PT spondingto Ca,o(Si..,oSr noCo or Po or)"6 r8 O24 (OHr ,rClo has a: 'u- : : Foou)r, ,0. Single-crystalX-ray structure study (R : 0.043) 5.120(l),b 5.160(l),c:7.535(2) A, o 107.06(l),B : : gavemonoclinic symmetry, spacegroup P2r, a: 9.526(2), 107.40(l),7 92.73(l)'. Cation orderingis significant, b : 9.506(4),c : 6.922(r)4,7 : rr9.99(2). The struc- and the structural formula is [Cuor, (Fe,Zn)ozz] [Cuo,n(Fe, Zn)o HrO. tural formula is Cao[Cau(OH),roo.sCl.3](Sioo)r(SOo)r- r,lSOo. J.L.J. [(Si,S)O4]r,and the lowering of symmetry from p2,/m is the result of mixed (O,OH,CI) occupancyof the channels, a slight ordering of tetrahedral cations with Si atoms, and Uralolite splitting of the Ca positions. J.L.J. K. Mereiter, G. Niedermayr, F. Walter (1994) Uralolite, CarBeo(POo).(OH)r.5H,O:New data and crystalstruc- Poitevinite ture. Eur. J. Mineral., 6, 887-896. : G. Giester,C.L. Lengauer,G. Redhammer(1994) Char- Single-crystalX-ray structure study (R 0.058) of ur- acterizationof the FeSOo.HrO-CuSOo.HrOsolid-so- alolite gave monoclinic symmetry, spacegroup P2r/n, a lution series,and the nature of poitevinite, (Cu,Fe)SOo. : 6.550(l),' : 16.005(3),c: 15.969(0A, B : 10r.64(2). H,O. Can.Mineral., 32,873-884. For the new cell and Z : 4, D^": 2.197 g/cm3.J.L.J.