American Mineralogist, Volume 76, pages299-305, 1991

NEW MINERAL NAMES*

JonN L. Javrnon CANMET, 555 Booth Street,Ottawa, Ontario KIA OGl, Canada Eowl,no S. Gnnw Department of Geological Sciences,University of Maine, Orono, Maine 04469, U.S.A.

platy either with a rhombic outline, or equant with a L.v.Razin, o.o. AnyuiiteAupb,-A nearly squareoutline. The mineral forms complex inter- ,,u".lJ,lt,liD possibly new intermetallic of gold and lead. Mineral . Zhumal, growths of three types with native lead, resulting I l(4), 88-96 (in Russian). from breakdown of solid solutions. In the intergrowths, anyuiite typically forms platy aggregatesranging from 1- Electron-microprobe analysesof the mineral and of an 50 pm acrossand 100-900 pm long, and prismatic crys- gave antimony-bearing variety Au 32.6, 34.3, 36.7, Ag tals 50 x 100 pm. Associatedminerals include ilmenite, 0.35,not detected,Pb 64.8, 59.0,52.9,Sb 0.3, 5.8, 10.2, titanian magnetite,chrome spinel, hematite, pyrite, chal- sum 98.05, 99.1, 99.8 wto/0,corresponding to (Au,or,- copyrite, and apatite. Sourcesof the mineral are small A& orr)",or, (Pb, n*rSbo o,r)", ooo, Au, oon(Pb, ,,rSbo ,rr)", ooo, Hercynian ultrabasic-gabbroid massivesderived from a and Au, r0r(Pbr s07sb0onr)", *0. Fragmentsare opaque, sil- platinum-bearing dunite-harzburgite magmatic forma- gray, very luster metallic. Oxidizes after 1.5-2 days, be- tion in the Anyui eugeosynclineof the Koryak-Kam- gray (sil- coming dull lead-gray. In reflected light, light chatka fold province. The mineral is named for the lo- very) with a faint creamy tint, fairly highly reflecting; cality (Bolshoi Anyui River basin). A polished section bireflectancebarely noticeable; commonly oxidized, be- containing anyuiite is in the Fersman Mineralogical Mu- gray poorly coming dark with a blue-black cast and re- seum of the USSR Academy of Sciences,Moscow. gray. flecting. Weakly anisotropic from silvery gray to Discussion. There are several discrepanciesbetween the The antimony-bearing variety is indistinguishable opti- reported intensities in the X-ray patterns for anyuiite and proper, cally but is slightly less reflecting than anyuiite synthetic AuPbr: notably, anyuiite is reported to have an (WTiC for which R, and R. at 20-nm intervals standard) intensity of 60 for ll} (5.22 A; vs. 6 for AuPbr, and l0 are: 420 56.7, 50.3; 440 59.0, 52.9; 460 60.7, 55.0; 480 vs. I 00 for 002; also, a line of intensity 45 and three lines 62.0,5 6.2; 50062.4, 57 .7 ; 52063.2, 58.3; 5 40 63.9,59.3; with intensities of l8 to 20 in synthetic AuPb, are missing 56064.6,59.9; 580 65.r,60.7;60065.6, 6r.4;620 66.0, in the pattern of the natural material. None of the lines 62.r; 640 66.r, 62.6;660 66.2,63.0; 680 66.5,63.4; 7 00 reported in the pattern of the natural material were as- : 66.8, 63.7. VHN2. 146 (range142-152.8), decreasing signed an intensity of 100. The phasehas been reported to 101 (range 100.8-104) for the antimony-bearingva- by other authors as inclusions in a kimberlite pipe, and riety. Plastic and malleable, nonmagnetic.The mineral is data were abstracted in Am. Mineral., 75. 931, 1990. too frne grained for single-crystal study. By analogy with E.S.G. synthetic AuPbr, tetragonal, spacegroup l4/mcm. From powder-diffraction data, a : 7.39(2), c : 5.61(3) A, D*. : 13.49g/cm3 with Z: 4.Lines attributed to the mineral Efremovite* are 5.22(60,1 l0), 3.74(20,200), 2. 8 2( I 0,002, possibly this Ye.P. Shcherbakova,L.F. Bazhenova (1989) Efremorrite 2ll), 2.59(20,220), reflection is a sum of 002 and (NHo)rMg,(SOo)r-Ammonium analogue of langbein- 2.48(10,I l2), 2.23(30,202),l.l 55(20,433),and l. I 30- ite-A new mineral. Zapiski Vses. Mineral. Obshch., (20,541). The remaining six lines in the pattern (intensity I l8(3), 84-87 (in Russian). rangesfrom 20 to 50) are attributed to gold. gave The mineral occurs in concentrates of gold-bearing A chemical analysis SO, 38.37, FeO 0.72, CaO alluvium from tributaries of the Bolshoi Anyui, north- 0.35, MgO 11.47,MnO 0.25, NarO 0.13, K2O 0.50, (NHo)rO 100.07 eastern USSR. Associated minerals in the concentrates 8.31,insoluble residue 39.97, sum wt0/0, (Mg' include gold, platinum, iridosmine, osmium, osmonrthe- corresponding to [(NHo), ool(oorNtu or]",o, ,nFoo.ou- Ceo S, O, ideally (NHo)rMgr(SOo)r.Sulfate niride [rutheniridosmine?], iridian-osmian laurite, chrome ooMnoor)", n, o, r, gravimetrically spinel, ilmenite, hematite, and sulfides. Polymineralic was determined with BaClr, magnesium gravimetrically pyrophosphate, + potas- grains containing the mineral, gold, and lead are with ammonia potassium photom- l-4 mm across,weakly rounded, angular, elongate and sium as chlorplatinate, and by flame etry. The insoluble residue is inferred to be organic ma- terial and quartz thal were admixed with the mineral. * Before publication, minerals marked with an asterisk were approved by the Commission on New Minerals and Mineral The mineral is soluble in water; upon heating with alkali Names, Intemational Mineralogical Association. and upon heating in a closed tube, ammonia is evolved,

0003-004x/9 1/0I 024299$02.00 JAMBOR AND GREW: NEW MINERAL NAMES

and (NH4)rSO4melts out and subsequentlydecomposes Electron-microprobe analysis gave NarO 3.52, KrO with evolution of ammonia. In air at ordinary tempera- 2.68,MgO 0.06,MnO 31.14,FeO l.l2,BaO 8.88,Al,O3 tures, the mineral is hydrated to boussingaultite in the 0.03, SiO, 27.32,TiO, 9.44, ZrO, 0.12, Nb,Os 13.35, course of several days. The mineral shows an endother- H,O (TGA) 3.49,F 0.84,O = F 0.35,sum 101.64wto/o; mic effect at 430-495 "C (maximum 475 "C) accompa- the ideal formula NarKBaMnrTi4Si8O3,(OH) r. 2HrO re- nied by a weight loss of 35.80/oassociated with decom- quiresNarO 3.62,KrO 2.75,8aO8.96, MnO 33.16,TiO, position into MgSOo and (NHo)rSOoand breakdown of 18.68,SiO, 28.09, HrO 4.74, sum 100 wt0/0.Occurs in the latter (the calculated weight loss from the ideal for- pegmatite at Mont Saint-Hilaire as orange-brown, pris- mula is 35. 5olo). Occurs as equant grains,0.0 I -0.0 I 5 mm, matic to tabular crystals to I mm, elongate [00], flat- in gray to white aggregatesthat have a dull luster, fI: tened on {010}; forms shown by the crystalsare {001}, -2, uneven fracture, vitreous luster, no cleavage.Aggre- {010}, {100}, and hjl (possibly101); swallow-tailtwins gatesare opaqueexcept in thin slivers. In immersion oil, on twin plane {001} are common. Crystals are transpar- colorless to locally tinted weak brown, isotropic, n : ent to translucent, vitreous luster, pale brown streak, 11 1.550(1).Hydration resultsin zoned grains with aniso- : 4, very brittle, uneven fracture, perfect {001} cleavage, tropic margins of boussingaultite.No single-crystalXRD D--" : 3.71(5),D*,. : 3.81 g/cm3.Optically biaxial neg- data. Given the close correspondenceofthe powder pat- ative,u : 1.785(2),B : l.8l(l), r : 1.82(l),2V^"". : tern with that of the synthetic compound (PDF 18- 66(lf ,2V. b: 64, X : b, Z Ir c: 9.6' in the acuteangle 110),cubic, space group P2r3, a: 9.99(l)A, D-" : 2.52 B; strong dispersion,r < y; pronouncedpleochroism, X, I g/cm3 with Z : 4. The strongestlines (31 given) of the : lrght yellow, Z: dark orange-brown.Monoclinic sym- powder pattern are: 5.76(35,lll), 4.07(70,211),3.15 metry, spacegroup C2/c, a : 10.819(3),b : 13.822(5), (100,310),3.00(35,311), 2.668(50,321), and 1.620 c : 21.149(41A, B : 99.61(3)"as refined from X-ray (25,6rr). powder data; the cell parametersand ideal formula give The mineral occurs in the burning dumps from two D*r" : 3.64 g/cm3with Z : 4. A pronounced subcellwith shafts in the Chelyabinsk coal basin in the southern Urals, spacegroup A2/m, A2, ot Amhas a' : a/2, b' : b/2, c' USSR. At one shaft the mineral was deposited from hot : c, Z: l. Strongestlines of the X-ray pattern, in order gasesissuing from a fumarole. The deposit consists of of decreasingintensity, arc 3.47, 10.4,2.61, 3.19, 2.08, four layersoverlying red burning rock (l) unconsolidated and 2.87. The new name is for ProfessorGuy Perrault of material on top, (2) asphaltJike crust with crystalsof sul- Ecole Polytechnique,Montreal, Quebec. fur and kladnoite, (3) crustsand stalactitesof mascagnite, Discussion.The data were published with the permis- (4) densecementlike gray massesdominantly of efremov- sion of G.Y. Chao, who is to present the complete de- ite, hydrated in the upper part to boussingaultite.At the scription at alater date. The mineral was referred to pre- other shaft, the mineral occurs in a white, fine-grained viously as UKl7, for which Chao et al. (Can. Mineral., crust on an incompletely combusted area of the dump 9, 109-123, 1967) gave the strongest X-ray lines as that is enriched by a carbonaceousmass. The new min- 3.47(I 00), 3.I 9(40), 2.87(50), 2.60(40),1.729(308), and eral is interpreted to have formed by the decomposition 1.599(30).J.L.J. of carbonate rocks (e.g., dolomite) in the dumps by sul- furic acid, ammonia, and the products of burning coal at temperaturesbetween 180 and 400'C. The association Svyatoslavite* with carbonaceousand organic (hydrocarbons?)materials B.V. Chesnokov, E.V. Lotova, V.S. Pavlyuchenko, L.V. may have enhancedthe stability of the mineral, slowing (Jsova, A.F. Bushmakin,'T.P. Nishanbayev (1989) its hydration. The mineral is named in honor of the So- SvyatoslaviteCaAlrSirO, (orthorhombic) - A new min- viet geologistand science-fictionwriter Ivan Antonovich eral. Zapiski Vses.Mineral. Obshch.,I l8(2), I I l-l 14 Yefremov (1907-1972). Type samples are in the Fers- (in Russian). man Mineralogical Museum of the USSR Academy of Electron-microprobe analysesof two grains gave SiO, Sciences,Moscow. 43.62,43.51,Al,O3 35.37, 35.28,CaO 19.33, 19.15, Na,O Discussion. Acceptance of the chemical analysis pre- 0.41,0.44,FeO 0.02,0.03, MgO 0.03,0.01, &O 0.01, sumes that the mineral is entirely soluble in water, as 0.02, MnO 0,0, sum 98.79,98.44wto/o; the averagecor- opposedto being partly soluble with separationof an in- respondsto (CaonuNao o4)Alr ejsi2 o4or, ideally CaAlrsiros. soluble portion, which could have been overlooked in the The mineral forms colorlesscrystals up to 0.5 to 0.8 mm 40 wto/oinsoluble residue. E.S.G. across, prismatic, elongate [00]. The main forms are {0ll} and {100}; {ll0} is common,but weaklydevel- oped. Streakwhite, luster vitreous, fluorescesweakly yel- Perraultite* lowish in ultraviolet (360 nm). Cleavage {100} weak, J.A. Mandarino, V. Anderson (1989) Monteregian Treas- fracture conchoidal, brittle, H : -6, D-*" : 2.695(5) in ures. Cambridge University Press. heavy liquids, D""," : 2.687 g/cm3 vdrthZ: 2. Biaxial L. Horv6th, R.A. Gault (1990) The mineralogy of Mont negative,a : 1.552(2), P : 1.578(2), r : 1.581(2), 2V*t Saint-Hilaire, Quebec.Mineral. Record,2l (4), 284-3 59. : 37.08", Z : a, Y : b, X : c. Orthorhombic, space JAMBOR AND GREW: NEW MINERAL NAMES 301

$oup P222 by a single-crystal method. Unit-cell pa- maguchi Prefecture, thermally metamorphosed bedded rametersdetermined from powder data are a: 8.232(5), manganeseore consisting of rhodonite, tephroite, man- b : 8.606(10),c : 4.852(S)A. fne strongestlines (59 ganosite, galaxite, rhodochrosite, and alabandite also given) are: 4.I 6(80,l0 l), 3.75(60,I I l), 3.22(100,021), contains witherite and BaMn(COr)r. Three electron-mi- 2.94(60,2 | t), 2.7| (70,r 30),2.09(80, 32 r), | .967 (7 0,0 4 l), croprobe analysesof the last mineral gave a composition 1.670(7 0,322), 1.329(60,252),and l.l 50(50,622). range of (Baorn-o n,Sro or-o,o)(Mtto.r-o u.M& rr-orrC€to ro-o,r)- The mineral occurs in burning dumps at Kopeysk, (CO.)r. At both the Hagidaira and Fukumaki mines the Chelyabinsk coal basin, southern Urals, USSR, where it unnamed mineral is intimately associatedwith witherite. formed at temperaturesnot below 700-900 'C as a sub- Discussion.Grain sizesare not given, but photomicro- limate on fracture walls in coal together with anorthite, graphs indicate that aggegatesof the unnamed mineral troilite, cohenite, fayalite, titanite, and graphite. The are up to 0.15 x 0.2 mm. SyntheticBaMn(CO.), is re- mineral apparently formed earlier than anorthite, and no ported to be hexagonaland isostructural with northesite. intergrowths with anorthite were found. The new name J.L.J. is in honor ofthe Soviet geologistSvyatoslav Nestorovich Ivanov (l9ll- ). Type material is in the Fersman Mineralogical Museum of the USSR Academy of Sci- Unnamed iron silicides, silicon* ences,Moscow. V.Yu Pankov, Z.V. Spetsius(1989) Inclusions of iron sil- Discussion. The space group was determined by ex- icides and native silicon in moissanite from the "Sy- tinction rules established by unfolding the layer lines tykanskaya" kimberlite pipe. Doklady Akad. Nauk through rotation around all 3 twofold axes.Unfortunately, SSSR,305, 704-707 (in Russian). possibility min- the authors did not consider the that the Electron-microprobe analysesat three spots in two in- eral was monoclinic modification of CaAlrSirO, syn- the clusionsgave Fe 42.57, 42.56, 41.39, Si 53.27, 52.21, Tak6uchi et al. (Zeits. Kristallogr., 137, 380- thesizedby 50.84,Ti 0.06,0.39, 0.71, Ni 0.61,0.68, 0.98, Cr 0.75, 1973),who also refined its crystal structure. Tak6u- 398, 0.97,1.14,Al 0, 0, 0.12,Mn 0.24,0.25,0.05,sum 97.50, spacegroup chi et al. reported that monoclinic CaAlrSirO', 97.06,95.23 wt0/0,corresponding to MeSirrnto MeSirru, pronounced pseudosymmetryfor P2,, ll,as orthorhombic where Me : analyzedmetals, close to high-temperature which extinctions are consistent with P222. Tak6uchi "a-leboite" (FeSi,r). At a few analytical spots,Ni reaches Davis Tuttle's (Am. J. 9ci.,250- et al. suggestedthat and 5.54 wto/o.Cr 2.61 wto/0,and Y 2 wto/o.In reflected light, for which A, 107-1 14, 1952) orthorhombic CaAlrSirOr, the silicide is cream-colored,opaque, and anisotropic. powder only data were obtained, is identical to mono- Electron-microprobe analysisof another material gave Tak6uchi et al. reported for the mono- clinic CaAlrSirOr. Fe 3.09,Si 6.80,Ti 64.64,Ni 0.30,Cr 0.49,Al 0.09,Mn phase : : : 4.8270) A, clinic a 8.228(l), b 8.621(I), c 0, sum 75.41 wto/o,which is suspectedto be a titanium : parameters to Davis and B 90.00(5)", that are close carbide. This material is white and more reflecting than : 8.606(6),c : 4.836(5)(both Tuttle'sa: 8.224(16),b the surrounding materials. : E.S.G. Z 2) and to those of the new mineral. The silicidesoccur with native silicon (98.1L98'99 wto/o Si) included in moissanite extracted from the insoluble residue of kimberlite of the "Sytykanskaya" pipe, USSR. Unnamed BaMn(COr), Most inclusions have an irregular and rounded shape,a F. Hirowatari, M. Fukuoka (1988) Some problems of the few are negative crystals; 80-1000/oof the inclusions are studies on the manganeseminerals in Japan. Journal native silicon. Areas of silicide reach 20 x 20 p.macross. Mineral. 18(6\,347-365 (in Soc.Japan, Japanese). Titanium carbide forms grains up to 4 x 4 1tmalong the The Hagidaira manga.nesemine at the village of Azu- contact of silicide with a gascavity or with moissanite in ma, ZeIa Township, Gumma Prefecture,Japan, contains two such inclusions. The inclusions are interpreted to have thermally metamorphosedbedded chert, rhodonite, ala- formed from a liquid, which cooled first to silicon, "a-le- bandite, rhodochrosite, manganosite,and tephroite with boite," and Ti carbide(?);subsequently, "a-leboite" broke associated witherite and BaMn(COr)'. Electron-micro- down to "p-leboite" and silicon in an intergrowth too fine probe analysis (one of three similar analyses) gave to be resolved with the electron microprobe. The mois- MnO 15.39,MgO 1.98,CaO 2.32,FeO 0.04,SrO 0.00, sanite and the phasesincluded therein are not products BaO 51.18,CO, (calc.)28.25, sum 99.16wto/o,correspond- of contamination: the insoluble residue from which the ing to (MnourMgo ,rCoo ,r)"0 nuB8, oo (COr), oo, ideally moissanite was prepared was extracted by chemical de- BaMn(COr)r. A fragment extracted from a polished thin composition of drill core. Moreover, presentmethods of section gave a Gandolfi X-ray pattern having strongest preparing industrial silicon carbide materials exclude the linesat 3.89(m),3.08(s), 2.54(m),2.14(m), and 1.910(m) possibility that inclusions of molten silicon carbide would A; these results are similar to those reported by Chang occur in moissanite;one such inclusion, 20 x 20 pm and (Am. Mineral., 49, 1142-1143, 1964) for synthetic circular in outline, was found. BaMn(CO,),. Discussion.The authors cite T : 1220 "C, P : I atm -- At the Fukumaki mine near the city of Hikari, Ya- for "a-leboite" and T 1420'C to melt Si. No attempt JAMBOR AND GREW: NEW MINERAL NAMES

is made to infer what conditions might be required for Discussion.Structural relations are discussedin greater theseat the mantle depths at which the kimberlite is in- detail in Kristallografiya, 35(2), 406-413,1990. E.S.G. terpretedto have originated. The temperaturesneeded to melt Si at thesedepths may be too great for a kimberlite magma, and "a-leboite" may not be stable at high pres- Mont sures.The name "a-leboite" is used by metallurgists for Saint-Hilaire minerals a high-temperature phase of composition FeSir.rr,vari- G.Y. Chao,R.P. Conlon,J. Van Velthuizen(1990) Mont ously describedas orthorhombic or tetragonal,in which Saint-Hilaire unknowns. Mineral. Record, 2l(4), 363- l3-23o/o of the Fe sites are vacant (R. Hultgren et al., 368. Selected Values of the Thermodynamic Properties of Bi- Mont Saint-Hilaire, an alkaline intrusive complex con- nary Alloys, 871-883, 1973, Am. Soc. for Metals). An taining abundant agpaitic syenites,is in Rouville County, abstractofdata for Si will appearin the March-April issue about 40 km eastof Montreal, Quebec.The complex con- of Am. Mineral. E.S.G. tains more than 250 speciesand numerous unidentified minerals, the latter designatedby the prefix UK. In 1979, Unnamed titanosilicate Chao and Baker updated the published list of the UK mineralsto UK47 (Mineral. Record,10, 99-l0l); as only E.V. Sokolova,R.K. Rastsvetaeva,Y.I. Andrianov, Yu.K. five of these UK minerals remain unidentified, they are Egorov-Tismenko,Yu.P. Men'shikov (1989) Crystal given structure of a new natural sodium titanosilicate. Dok- included in the summary below. Most of the UK lady Akad. Nauk SSSR,307(l), ll4-ll7 (in Russian). minerals occur in silicate cavities or in sodalite xenoliths (abbreviated below as SC and SX, respectively). Omis- Chemical analysis (not given) of a new titanosilicate sion of a UK number means that the phase has been from the Khibiny alkaline massif,Kola Peninsula,USSR, identified. gavethe empirical formula (Nar r'G urrCa,o*Sro ourBa" oru- UK29. Black to dark reddish brown balls (l mm), golden Ceo eo ooo)",oo(Ti3 8,6Nb0 rnrF oroZfo oou)"oo'Si, rrrO,r(Oo oo, yellow to reddish brown flakes in irregular patches on Ho rrr)",000. 3.7HzO. Single-crystalX-ray structural anal- microcline, analcime, natrolite, and others. An Fe2*-rich ysis indicated tetragonal symmetry, spacegroup P4r/mcm, trioctahedral smectite of composition (Na,K,Ca)oro_o.or- a: 7.819(2),c : 12.099($A; D-... : 2.80,D.,.: 2J8 (Fe'z*,Mg,Al,Mn,Ti). (Si,Al)4O,0.nHrO. Strongest g/cm3 with Z : 2. The ideal formula is ro_323 Nar(HrO)z powder-diffraction (sio.)'lK(H'o)". J.LJ. X-ray lines and intensities are lri,os(oH) r2.4(ro0),2.636(20),2.508(l 5), 2.309(10), 1.537(l 5), and 1.528(10)A. Occurs in pegmatites,marble xenoliths, and Titanian biotite-4M, SC. V.I. Pavlishin, A.P. Zhukhlistov, B.B. Zvyagin (1988). UK32. A hydrous carbonate of Ca-Y-Al occurring as The first find of a heterogeneouspolytype 4M,Ti-bio- white, silky aggregates,rarely as acicular, colorless hex- tite. Mineral. Zhurrllal,l0(4), 93-98 (in Russian). agonal crystals striated along the length. Good basal cleavage,D-*" : 2.15(l) g/cm3, strong effervescencein A chemicalanalysis gave SiO, 35.62,TiOr 7.50,AlrO3 HCl. Hexagonal, P6/mmm, P622, P6mm, P6m2, or 15.89,FerO, 2.19, FeO 10.43,MnO 0.04, MgO 13.86, P62m, a: 10.830(2),c : 10.516(5)A. Opticallyuniaxial CaO 0.12, BaO 1.07,NarO 0.62,KrO 9.08,LirO 0.01, negative,e : 1.50I ( l), ar: 1.532(l).Strongest X-ray lines HrO* 3.15,HrO- 0.11,F not detected,sum 99.69wto/0, are 9.38(100), 4.58(65),3.7 7 (45), 3.358(50),2.49 l(7 0), corresponding to (Ko,rNao onCso Fefr[,Fel o,)"0nr(Mg, ,, fr- and 2.143(50). In pegmatite and SC. Tio42Alo 08)"2 82(Alr 33Si2 6Or.XOo 3rOH, u.)", oo. Electron- diffraction study gavea : 5.335,b : 9.24, c : 40.03A, UK33A. Sr,Na,(Ce,La)Y(CO3)6.3H,O(?); a REE ana- P : 92.54, and intensities and extinctions are consistent logue of donnayite-(Y), from which it is megascopically probably with a monoclinic, heterogeneous4M, polytype. The ti- indistinguishable. Pseudotrigonal, triclinic. tanian biotite forms {001} platy, reddish megacrystsa StrongestX-ray lines 4.27(90), 3.207(50), 2.827(100), few cm acrossin upper Proterozoic camptonite that cuts 2.023(60),r.976(60),1.916(60) A. In SC,and in carbon- granosyenitesin the Khlebodarov quarry in the eastern ate cavities(?).UK33 is donnayite-(Y). part of the Azov Sea region, USSR. The megacrystsare UK37A. White, greenishgray, brown barrel-shapedand rimmed by a reaction zone a few mm across.Other mega- pagoda-shapedcrystals megascopicallyindistinguishable crysts in the camptonite dikes from this area are alumi- from ewaldite, donnayite-(Y), and mckelveyite-(Y). Hex- nous augite, kaersutite, iron-rich biotite, alkali feldspar, agonal,P6,mc, a: 5.193(l), c : 12.25(\ A; srongest spinel, and magnetite.The matrix for the megacrystsin- X-ray lines 4.50(60), 4.23(80), 3.023(100),2.596(70), cludes finer grained titanian augite, ferrohornblende, se- 2.39l(50), and 1.976(90). Composition SrrNaCaY(CO,)u. ricitized andesine, and serpentinized olivine set in a 3HrO (?),probably the Sr analogueof ewaldite. In SC and groundmassof fine-grained to cryptocrystalline chlorite, carbonate cavities, pegmatites, and igneous breccia. UK37 sericite,calcite, feldspar,and glass(n = 1.54).The titani- is ewaldite. an biotite is inferred to have crystallizedfrom the original UK38. Canary-yellow patchesof minute flakes, rarely as oC magma at 1200 and 18-20 kbar in the upper mantle. small tabular hexagonal crystals. Composition JAMBOR AND GREW: NEW MINERAL NAMES

(Na,K)r(Mn,Fe,Ca,Ti,Al)r(Si,Al)8Oro'SHrO (?); water as- UK58 group. M.AI,(OH),,(CO3)'4H,O (?) where M : sumed, by difference.Trigonal, P3 or P'3, a: 14.659(3), Mg,Fe,Mn. Colorless to white (Mg), pale brown, brown, c : 12.667(\ A. Uniaxial negative,e : 1.534(l), <^r: and pale blue (Mn,Fe); hexagonal,tabular to prismatic 1.550(l). Strongest X-ray lines 12.65(100),8.96(50), and barrel-shapedcrystals. Group l: hexagonal,Q : n x 4.01 (50), 3.1 66(50), 2.839(60), and 2.646(70). In SX and 5.3, c: 15 A (n: I or 2); strongestllines 7.56(100), sc. 3.77 4(7 0), 2.576(50), 2.21 8(50), I .8 5 4(50), and I .5 5 4(40). 22.8 A; strongestlines UK48. Beige, prismatic crystals (0.2 mm), commonly in Group 2: trigonal, a: 11.0,c: 2.344(30),1.969(30), and clusters. Composition CaYr-"(Si,Be,B)o(O,OH)'o'2HrO.7.56( I 00), 3.77 4(7 0), 2.668(50), Monoclinic, P2, or P2,/m, a: 9.965(4),b : 7.692(2),c 1.586(20). Optically uniaxial negative,e : l. 53 l- l' 5 48,a : l. 53 l- : 4.822(2)A, B : gO.Ot(l)".Biaxial positive, a : 1.701(3), 1.587,birefringence 0-0.039. Mn and Fe membersare P : r.706(3),7 : r.7r5(3),2v : 74(ry, b : Y, c It X : to brown. In SC and 9.5'. StrongestX-ray lines 6.09(50),4.83(50), 3.778(30), strongly pleochroic from light brown pegmatite, hornfels. 3.593(30),2.882(100), and 2.580(60).In SC(?). carbonatecavities, rarely the Ti ana- UK51. A(OH)3 (?). White, translucent to opaque balls UK59. NaCa(Mn,FeXTi,Nb,Zr)SirOr(O,Dr, Yellow and irregular powdery patches in SC and pegmatites. logue oflavenite and Ca analogueofjanhaugite. flattened elon- StrongestX-ray lines 4.81(100),4.34(60), 4.18(60), to orange-brown fibrous crystals, {100}, P2,/a, a 2.394(50), and2.293(4$ A, very close to those gate [001]; distinct {100} cleavage.Moloclinic, 3.90(30), : :9.79o(7), : tOS.Zt(:)". of nordstrandite. to.azs(z),b c:7.054(2)A,B Optically biaxial negative,a: 1.743(2),0 : 1.785(2),t UK52. Red to reddish brown platy crystals as spherical : 1.810(5),2V:72-84, Y: b, c 'L X: l5'in obtuse aggegates; also as irregular grains with curved crystal fac- r > v moderate, X : pale greenishyellow, I: yellow, es. Composition variable, best representedby (K,Na)o-,- 0; Z : brownish red to deep red. Strongest X-ray lines (Mn,Fe)o.nSirOro.nHrOwhere x: 0-1.5, y:0-0.5, n * 3.945(20), 3.234(30), 2.8 59( 1 00), 2.807(7 0), r.7 62(20), 4; water assumed, by difference. Strongest X-ray lines and 1.741(20).In SC and nepheline syenite. r2.23(r00), 5.l 0(30), 4.34(40), 2.823(50), 2.625(50), and REE, with Sr > Ba; prob- 1.674(30)A. In pegmatite. UK60. Carbonateof Sr, Ba, Ca, ably hydrous. Small (0.1 mm) pearly white, hexagonal UK52A. Properties, occurrence, and X-ray lines as for plates, or as flakes in rosettes or irregular clusters. Strong- UK52. Composition (Na,K)rTir(Fe,Mn)r-rSirOro'nHrO est X-ray lines 4.45(I 00), 3.0I 2(60), 2.563(30), 2.42O(l 5), where n = 4; water assumed,by difference. 2.211(40),and 1.975(40;A. fr4aintyin SC, also in SX. white, pink, pale blue, vitre- UK53. NaBSiOo.Colorless, UK60A. Similar to UK60, but with Ba > Sr. Strongest pseudohexagonal ous transparent to translucent, crystals X-ray lines 4.43(100),4.05(20), 3.102(30), 2.557(70), striated along elongation; also botryoidal, as balls, and 2.206(30),and 2.163(30)A. radiating clusters of microscopically twinned prismatic UK6f. Na,-rCarTirSi8Or4(OH),-r'sHrO (?); water as- grains; D-""" : 2.86 g/cm3. Monoclinic, P2r/n, a : sumed, by difference.Ca analogueof zorite. Oflwhite to 8.001(l),b:7.693(2), c: 13.885(6)A, B: 89.80(2)". pale tan, orange-brown prismatic crystals. Good {100}, StrongestX-ray lines 4.34(60), 3.848(70), 2.778(100), cleavages.Orthorhombic, Bmmm, Bmm2, 2.314(50),2.217(60),and 1.926(40).In SX. {010}, {001} or 8222,a: 23.19,b :2 x 6.955,c: 2 x 7.192A'. UK53A. Similar to UK53 but hexagonal, P6m, P6, or Biaxialpositive, a : 1.599(1),B : 1.610(l),t: 1.696(l), :8.036(3), : : P-6,a c 7.709(3)A. Uniaxial negative,e 2V : 38(l), X : a, Y : b, Z: c. StrongestX-ray lines : 1.578(1),<.r 1.588(l). StrongestX-ray lines 4.02(40), I l. 59(l 00), 6.93(I 00), s.27(30), 3.069(50), 2.984(30), and 3.8 5 8 (6 0), 3.5 6 4( 5 0), 2.782(r 00), 2.32 | (50), and'2.222(7 0) 2.588(30).In breccia(?). A. tn sx. UK62. Nar(Ca,Mn)r(CO3)3(F,OH).Vitreous, colorless, tan UK55. Cu2oS,x:0.12-0.37. Irregular submetallicgrains, to brown, transparent to translucent masses and blocky black with a violet tint. X-ray patterns fall into four ma- to prismatic crystals(0.3 mm). Conchoidal fracture, good jor groups, one of which is similar to that of anilite, Cu'So. {001} cleavage,{010} imperfect,H: -3,D-*.: 2.67(2) In SX. g/cm3. Efervesces in HCl. Optically biaxial negative, a : : UK56. White balls (0.5 mm) of silky fibers of composi- 1.472(r), 9 : 1.562(l),y : 1.569(l),2V : 25(ry, v b' tion CaNboOr.l2H2O (?); water assumed,by difference. X It c : 6' in acuteB. Monoclinic, C2/ c or Cc, a : 8.043(4), Strongest X-ray lines 10.28(100),6.16(20), 4.78(60), b: 15.812(5),c: 7.030(3)A, p: l0l.l6(3r. Srrongest 4.70(60),2.680(30),and 2.058(50)A. tn veins in albite- X-ray lines 7.081(70), 2.895(1 00), 2.7I 1(80),2.637 (60), quartz hornfels. 2.039(60),and 1.869(60).InSX. UK57. (Na,Ca,K)uSiroOr4(F,OH,Cl)'4HrO(?); water as- UK63. NaLirPOo. Vitreous, white, pale yellow, pale blue sumed, by difference.Pearly, white micaceous.Triclinic, irregular grains. Fracture conchoidal, good cleavages Pl or PI, a: 9.62,b :9.61, c : 12.10A, o : 86.99,P {100}, {010}, {001}, {ll0}. Orthorhombic,Pmnb or : g.g7l(4), : : 99.51,t : 120.04. StrongestX-ray lines 11.80(80), P2,nb,a: 6.874(2),b c 4.9281(\ A. Op- 5.94(78),3. 1 I 0(50),2.97 8(30), 2.8 87(l 00), and 1.8I 9(60). tically biaxial negative,a : 1.533(l), A : 1.540(l), t : In breccia(?). 1.541(l),2V: 49(lf, X: a, Y : c, Z: b. Strongest JAMBOR AND GREW: NEW MINERAL NAMES

X-ray lines 4.02(I 00), 3.5 I 2(I 00), 3.440(I 00), 2.489(90), crystals.Monoclinic, C2/c, a: 28.67(3),b : 8.619(3),c 2.462(90),and 1.719(40).In SX. : 5.215(l) A, p : 90.98(2F. SrrongestX-ray lines UK64. Na,Ca,Co(PO4)4(SiO,)4(OH,D3.4H,O(?); water | 4.3 2(r 00), 4.77 (30), 2.99 5(50), 2.73 8 (30), 2. | 49(20), and assumed,by difference. Vitreous, brown to reddish brown, 2.134(20).InSX. irregular grains to prismatic crystalscoated with a film of UK75. (Na,K)CaTirSi,oor,(OH).6HrO (?); water as- amorphoussubstance; good {001} and {ll0} cleavages. sumed, by difference.Ti analogueof lemoynite. Vitreous, Orthorhombic,P22,2,, a: 12.297(2),b: 14.660(3),c: brown, irregular grains (0.5 mm) in a carbonate matrix. 7.2454(4)A. Optically biaxial, refractive indices x 1.52- Brittle, conchoidal fracture. Monoclinic, C2/m, a : 1.64approximately along elongation,X: b, Y: c, Z: 10.197(3),, : 15.885(7),c: 9.n 8(3)A, p: 104.5r(2). a. Strongest X-ray lines 9.42(80), 6.56(40), 6.29(40), Opticallybiaxial positive, a: 1.567(l),€ : 1.591(l),r 4.72(50),3.948(60),2.722(100), and 2.577(70).In SX. : 1.618(l),2V : 87",X : b, Y It c : 15, Z L a : 0". UK65. BaoCe(CO,),F(?); CO, by difference.White to sil- StrongestX-ray lines 8.85(80),7.93(100), 6.85(50), very gray, vitreous to dull crystals (0.1 mm), commonly 4.34(60),3.509(90),and 3.421(80).In brecciaor marble in dendritic and stellate groups. Effervescesin HCl. xenoliths(?). Monoclinic,P2,, or P2,/m, a : 13.18(l),b : 5.073(l),c UK76. MnuAlr(SOo),(CO3)"(OH),?-,;tH,O(?) where y : :6.724(4) A, P:102.16(3F. Opticallybiaxial negative, 5-6, x unknown; water and CO, assumedand by differ- a : 1.594(l),B 1.710(5),7 : 1.715(5),2V : 16(r)',Y : ence.Rosettes of pale brown, tabular, hexagonalcrystals; b, Z It c:26 in obtuseB. StrongestX-ray lines4.02(100), mild effervescencein HCl. Trigonal, a : 3 x 3.1, c : 3.272(90), 2. 539(30), 2. | 43(40),2.007(5 0), and I .6 3 6(30). 11.14A. Uniaxial negative,e : 1.506(l);

Strongest X-ray lines 12.68(100),9.24(50), 5.17(40), Platynite 4.24(50),3.651(25),and 3.077(30)A. In Sx. S.A. Nikitin. Ye.B. Anderson,N.V. Petrova(1989) New UK84. Nao(Zn,Mn)rSi7Or8'5H2O.Colorless to mauve, data on platynite and lead isotopism in associatedsele- (in vitreous, equant,pseudohexagonal crystals. Perfect { l0l}, nides.Zapiski Vses.Mineral. Obshch. I l8(3), 22-28 {010}, and poor {120} cleavages;conchoidal fracture, -FI Russian). : 6.5, D-"o":2.52 g/cm3,bright apple-greenfluorescence Fifteen electron-microprobe analyses of three grains in short-wave ultraviolet light. Orthorhombic, F2dd, u: gave the following averagesfor eachgrain: Pb 20.8, 17.7, 10.21l, b : 39.88,c : 10.304A. Opticallybiaxial posi- 27.1, Bi 49.3,52.4, 43. l, Se25.5, 26.2, 25.8, S 2.9l, 2.18, : tive,a : 1.520,A: l.52l, y 1.524,2V: 61.3(4)'.In 2.5, sum 98.63, 98.48, 98.5 wto/0,corresponding to SX. J.L.J. Pbo e3Bi, ,n (SerSo ,o)", ,0, Pb0.77Bi2 ,, (SerSo or)>: or , ?[d Pbr 2Bi,6e(Se3Se7,)"rr',suggesting solid solution of the type Pb"Bir-"(Se,S)0.The mineral forms aggregates,up to 1.5- 2.0 cm across, of allotriomorphic grains. Color white, luster metallic, cleavageperfect in two directions, brittle, New Data conducts electricity, H : 100-140 kg/mmz (mean I l2), but possibly only 70-100 kg/mm2 becauseof hardening during polishing. White in reflected light, highly reflecting Euchlorine and distinctly anisotropic.R, mostly 44.545.5o/o,R'47.5- F. Scordari, F. Stasi (1990) The crystal structures of eu- 43.5o/o(400-750 nm) [specific values are not tabulated, chlorin, NaKCurO(SOo)r.Neues Jahrb. Mineral. Abh., but reflectanceis illustrated in a diagraml. The strongest l6r(3),24r-253. powder X-ray diffraction lines (20 given) are: 5.45(20)' X-ray single-crystalstructural study (R : 0.048)of 3.965(100), 2.97r(40), 2.598(20), 2.549(20), and A. euchlorine from fumarolic deposits at Mount Vesuvius, l.e8l(20) in pitchblende-selenidemineraliza- Italy, indicates that the mineral is monoclinic, spacegroup The mineral occurs tion in a zote of faulting and folding in a lower Protero- C2/c, a: 18.41(5),b : 9.43(3),c : 14.21(5)A, B : sedimentary complex in the Baltic 113.7(3f, D-"". : 3.28, D"t" : 3.28 g/cm3 for Na- zoic volcanogenic The mineral is closely associatedwith the KCurO(SOo), luv.rthZ: 8. The structural results are an Shield, USSR. generation of pitchblende dated ar 1760 Ma, and is elaboration of data previously reported by the authors first partly replacedby clausthalite and paraguanajuatite'As- [abstractedin Am. Mineral., 75, p. 1214, 1990].J.L.J. sociated minerals include pyrite, chalcopyrite, and more rarely, magnetite, chalcocite, sphalerite, g?lena, and na- tive iron. E.S.G. Nacaphite E.V. Sokolova, Yu.K. Egorov-Tismenko, A.P. Komy- Sobolevite akov (1989) The crystal structure of nacaphite. Dok- lady Akad. Nauk, 304(3),610-615 (in Russian). E.V. Sokolova, Yu.K. Egorov-Tismenko, A.P. Khomy- akov (1988) Crystal structure of sobolevite. Doklady study of nacaphite gave triclinic X-ray crystal-structure Akad. Nauk SSSR,302(5),Ill2-ll18 (in Russian). symmetry,space group Pl, a: 13.387(7),b : 13.383(5), c:7.072(3) A, a:90.25(3), B : 89.73(4),t: 133.r2(3Y. SingJe-crystalX-ray structural study of sobolevite gave : : Elimination of a block of nine weak reflectionsand adop- triclinic symmetry, spaceg,roup Pl, a 7.078(l), b : tion of the non-standard spacegroup Cl reduces R to 5.4115(7),c: 40.618(10)A, cv: 90.01(2),P 93.19(2), 7.54o/o;parameters for the Cl cell are a : 10.656(4),b : r : 90.00(l)', D^.:3.03 g,/cm3,Z: 2. Cell dimensions 24.443(6),c:7.102(2) A, o:89.99(2),9 :90.0r(2), t ire similar to those previously attributed to a monoclinic : 90.01(2f. The structural formula is Nar(NaonrMnoor)r- cell. The structural formula is Na,,(Na,CaL(Mg,Mn)- (Nar, rCaonr)(Cao rrSro or)r[POo]rFrl D*r" : 2.88 g/cm3with Tio[SirOr]rpooloOrFr. The symmetry and formula are Z: 2. The formula, cell, and symmetry are new. J.L.J. new. J.LJ.