American Mineralogist, Volume 64, pages 241-245, 1979

NEW MINERAL NAMESX

Mtcunel FLnrscHen,Groncr Y. Csno ANDADoLF Pessr

Bartonite*, unnamedNaFeSr(OH) short-wave light bazirite shows moderately strong, pale bluish-whitefluorescence. A. P. G. K. Czamanske,M. A. Lanphere,R. C. Erd, and M. C. Blake, Jr (1978)Age measurementsof potassium-bearingsulfide mirr- {oAr/8eAr erafs by the technique. Earth Planet. Sci. Lett , 40, Boyleite* 107-t10. Kurt Walenta (1978) Boyleite,a new sulfatemineral from Krop- The sulfidesoccur with rasvumite and pyrrhotite in clots (3- back, southern Black Forest (in German). Chemie der Erde, 37, 6cm) of coarse nepheline,phlogopite, and sulfides,in an alkalic 73-79. diatremeintruding Franciscanmelange at Cdyote Peak,northern Analysis of a sample containing gypsum gaveZnO 29.25, MgO California. Bartonite occurs in blackish-brownmasses up to sev- 2.82, SOB39.76, remainder (CaO,HzO) 28.17,sum 100.0070.After eral mm across, intergrown with pyrrhotite. Microprobe analyses deducting ll-6% gypsum, this correspondsto (Zno6aMg6,5)SO.. by GKC (standards:sodalite for Cl, syntheticNi-Fe sulfidefor Ni, 4HrO. The mineral dehydratesin dry rooms to gunningite. Soluble crocidolite for Na, biotite for K and Mg, chalcopyrite for Cu) of rn water. bartonitegave K 9.91, 10.7;Na 0.01,0.18; Fe 50 0, 49.0;Cu 0.52. X-ray powder data (49 lines) are given; the strongest lines are 0.66;Ni 0.15,0.34;S 38.2,37.3;Cl 0.04,1.40; sum 99.33,99.58Vo, 6.8s(8X0rr), 5.46(l0Xll0), 4.47(l0xl20,tI l), 3.39(7X040), correspondingto the formula KrFe,oS,o.The name is for Paul B. 3.20(5Xl Barton, Jr., geologist,U.S. GeologicalSurvey. l2), 2.95(7b)(t40),2 55(SX051,221). These are in good agreementwith No data are given for the unnamed mineral. the data of Pannetieret al., Bull. Soc.Chim.,324- 326(1966), for pureZnSO. .4HrO, who reportedit asmonoclinic, Discussion spacegroup P2'/n,a = 5.95,b = 13.60,c = 796A,d : 90"18', z:4. Again the first publication of a new mineral name is an in- The mineraloccurs as white, earthy, reniform adequate description, omitting all X-ray data. It is to be hoped that or masses.Cleav- this practicewill be discontinued.M,F. agenot observed,fracture uneven. H probablyabout2. Optically biaxial,negative, d = 1.522+0.0002,d = 1.53t (calc),7 : 1.536*0.002,2V - 70.. Bazirite* The mineraloccurs as an alterationproduct of sphaleritein the quarryat Kropback,southern Black Forest, Germany. name B. R. Young, J. R. Hawkes, R. J. Merriman, and M. T. Sayles The is for R. W. Boyle,geologist, Geological Survey of Canada,who (1978) Bazirite, BaZrSirOr, a new mineral from Rockall Island, mentionedthe occurrenceof ZnSOn4H"O at Keno Hill, Yukon Inverness-shire, Scotland. Mineral. Mag., 42, 35-4O (see Am (Can Mineral., 61, 175, 1976). Mineral.,7,209-218, 1962).Boyleite is isotypicwith stark- eyite(leonhardtite), rozenite, ilesite, and aplowite.M. F. Baziriteoccurs with elpidite(NarZrSi6Or6.3HrO) and other late- stage interstitial minerals in the aegirine-riebeckite granite of Brenkite* Rockall Island (57"36'N ; 13"41'W),as colorless,mostly anhedral, grains. "Low" and "high" titanium varieties have the respective G. Hentschel,U. Leufer,and E. Tillmanns(1978) Brenkite, a new mean compositions:SiO, 39.7l,ZrOz 26.38,BaO 33.69,TiOr 0.l7, calcium fluor-carbonatefrom Schellkopf,Eifel (in German). SnO, 0.0670;and SiO. 39.59,ZrOz 26.t2, BaO 34.12,TiO, 0.51, Neues Jahrb. M ineral. M onatsh.,325-329. SnO, 0.1l%o. Low- and high- types exist, probably Analysisgave Ca 44.3,44.7 F 21.1,21.3, 21.3, 21.6; C 6.6,6.6, due to differencesin Ti content; uniaxial positive, o = 1.6751(3),e ; 6.'1,6.8, correspondingclosely to theory for CaFlCaCOr. The = 1.6850(3)and c,r: 1.6813(3),e : 1.691(deduced). The mineral mineral dissolveswith effervescencein dilute HCl. The infrared clearly has the benitoite structure in the P6c2. Cell spectrumis given. dimensions:low R. I. varie|ya: 6.7690(5),c: 10.020(l)A,high Single-crystalstudy showedthe mineral to be orthorhombic, R.l. varietya = 6.7622(5),c: 10.0158(10)A,Z : 2, D (catc): spacegroup Pbcn,a:7.650, = 7.550, = 3.82. Strongest lines in the powder diffraction pattern b c:6.5484, Z 4,G are : = 3.80(r00x10.2),2.800(t00xl 1.2), s.8s(3sx10.0), 3.38(3s)(l 1.0). rn (calc) 3.126,(meas) 3.10+0.04.The strongestX-ray lines (32 given)are 3.276(60X002,021 ), 3.028(80X21 l), 3.006(80X102,t21\, 2.7e4(tm)(ll2), 2.486(70)(202), 2.265(60X3ll), 1.835(80) (2t3,t23), l .790(60X330). +Minerals marked with asterisks were approved before pub- The mineraloccurs as radiatingaggregates of lath-likecrystals lication by the Commissionon New Minerals and Mineral Names upto I mm,showing forms {010}, {ll0}, {102},and {021}, at Brenk, of the International Mineralosical Association. Eifel,Germany. Colorless, white, hardness 5. Opticallybi- o003-N4x/ 79 / 0| 02-024I $00. 50 241 NEW MINERAL NAMES axial negative,a = 1.525,8 : 1.590,7 = 1.593,2V : 26-28",X : Cobalt-frohbergite c, Y = a. No distinct . E. M. Spiridonov, N. F. Sokolova, A. K. Gapeev, and T. N. The name is for the locality. M. F. Chvilova (1978) Cobalt-frohbergite (mattagamite) of the Zhena-Tyube deposit in Kazakhstan (first find in the U.S.S.R.) (in Russian). New Data on the Minerals of the U.S.S.R Chabourneite* (formerly Trudy Mineralog. Muzaya Akad. Nauk SSSR), 26, Pauf Picot and Zdenek Johan (1977)Atlas des Mineraux - I 40- 145. liques. Mem. Bur Rech Geol Minieras,90, l-402 (see p. ll5). Microprobe analysesare given of 23 mineralsof the seriesfroh- Chabourneite,(Tl,Pb),(Sb,As),,S0., triclinic, occurs with real- bergite (FeTer)-mattagamite (Co,Fe)Tez. These are called frohber- gar, pierrotite, routhierite, laffittite, smithite, and stibnite at Jas gite (Co : O-1.0070),cobalt-containing frohbergite (Co = 1.3- Roux, France.Color white. Strongly anisotropic.Reflectances are 36vo), and cobalt-frohbergite(Co : 6.2-8.8, Fe : l3.l-l0.l7o). given at l5 wave lengthsfrom 420to7O0 nm. Max. and min are: Optical and X-ray data are given. Two alternative nomenclatures 420 nm, 40.O,32 l; 580, 35.1, 3O.2:7OO, 30.7, 26.4. M. F. are suggestedfor this ditelluride series("the first is probably more rational" ): I. FrohbergiteFer-o Changbaiite "Coo-0" Mattagamiteor cobalt-frohbergiteFeoT orCoo, o, Detachment No. 8, ComprehensiveGeological Brigadeof Tong- Cobalt-tellurideFeo r-oCoo r-, hua Region and Petrology and Mineralogy Laboratory, Kirin II. FrohbergiteFe, o_rCoo-0, lnstitute of GeologicalScience (1978) Changbaiite (PbNbrO.), a Cobalt-frohbergiteFeo, ouCoo, o " new mineral of and niobium from easternKirin, China (in M attagamiteFeo u-o sCoo u-o , Chinese with English abstract). Acta Geol Sinica, I , 54-62. Cobalt-tellurideFeo3 oCooT1

Chemical analysis,after deducrionof AlrOr, SiO, and LOI due Discussion to admixed , and microprobe analysis(in parenthesis) Endless confusion has been caused in the past by names such as gave: FeO 077 (0.94), PbO 44.12(41.51), FezOs0.42, TiO,0.89 cobalt-frohbergite, which most readers would take to mean the (0.95), Nb,O5 53.43 (55.62), Ta,Ou 0.37, sum 100.00 (99.02) cobalt analogue of frohbergite, not cobaltoan frohbergite, as it percent. The chemical analysis corresponds to (PboruFeS.*ou) actually is. This name and the proposalto changethe meaningof (Nb, ouFef+o2Taoo,)O" or PbNbrO.. Semi-quantitative spectro- "rTio mattagamite without consulting the original proposers of the name graphicanalysis showed Sb - 0.3, Si 0.1, Ba 02, Ca - 0.1, As or the IMA Commission should be rejected The paper describing 0 05-0.03 and tracesof Al, Mg, Cu and Mn. mattagamite stated that the name was to be applied to the end The mineral is trigonal, R3m, a : 10.499,c : 11.553A,Z : 9. member CoTer. The two names frohbergite and mattagamite, with The X-ray powder diffraction pattern is identical to that of the suitable adjectival modifiers, are sumcient to describe the series. syntheticrhombohedral PbNb,O6.The strongestlines are (48 plus M.F. 7 p-lines given): 3.100(l0Xll3), 3.028(9X030),2.t60(s)(223), l.ele(4xr25), 1.760(6xr43), 1.74s(3)(330), r.621(sx036), I .5 I 3(3X060), I 3s9(3 )(25 3 ), t,294(3)(336),0.985(3X636 ). I nfrared Emeleusite* absorption bands are: 870(m), 676(vs), 517(vs),423(w), 366(s), B. G J Upton, P. G. Hill, O. Johnsenand O. V. Petersen(1978) 330(w, sh:shoulder), 301(m), 279cm-'(w,sh). DTA (l00",zmin) Emeleusite: a new LiNaFerrI silicate from south Greenland showeda strong endothermicbreak at I 100-1200"C(melting). Mineral Mag.. 42. 3l-34. The mineral occurs as small tabular crystals and sometimes as spherules,average 0.2-0.4mm and up to 5mm in size.The crystals Emeleusite (LirNa.Fe!+Si,rOro) occurs as orthorhombic display 3m symmetry and are bounded, in order of decreasing (pseudohexagonal)euhedra within a facies of a peralkaline prominence.by l000tt, l000Tl, 10tTll. tl0TTl, tt0T2l. t0lDl. trachyte dike. Microprobe analysis (Li by flame photometry) gave and {1120}.The mineral is colorless,cream white, pale brown, SiO, 70.75,TiO, 0.55, ZrO"O.l0, Al,Os 1.34,Fe,Os 12.13,MgO yellowish-brown,pale yellowish-greenwith white streak and ada- 0.10, MnO 0 03, NarO I1.98, Li,O 2.78, sum 99.76Vo.Diffraction mantine to pearly luster. It is transparent to translucent, brittle and sy mbol A ba*, a : 10.073(2),, : I 7.350(5), c : 14.010(5)A, Z : 4, non-magnetic. Basal cleavageperfect, rhombohedral cleavagedis- G : 2.76(1) (meas), 2.775 g/cms (calc); H 5-6; colorless, trans- tinct, fracturehackly but conchoidalfor spheruliticgrains. VHN = parent,vitreous, biaxial negative, small 2V, . (llb) : 1.596,B (lla) 472.4kg/mm2 or 5.3 on Mohs scale,G (meas) 6.48 (6.47 in ab- = 1.59'1,r ( | | c) : 1.597.Emeleusite can occur as interpenetration stract),(calc) 6.51g/cm3.The mineral is not fluorescentin cathode triplets with {l l0} as twin planes.Prominent powder diffraction rays and UV light It is insoluble in HCl, HNO., and H,SO., lines are: 7.001(5X002),4.3s2(t0)(220,040), 3.501(7X004), slightly soluble in warm H.PO'. Optically the mineral is uniaxial 3.209(8X3ll),and 3.090(7)(124).The nonstaridardsetting was positive,e = 2.485,a :2.476, and sometimesanomalously biaxial chosen to emphasizethe pseudohexagonalcharacter and the close with2V : 0-38" and dispersionr ) u. Reflectance= 15.86at 546 relation to members of the milarite group. The name is for Dr nm. C. H. Emeleusof the University of Durham. A.P. The mineral occurs with quartz and potassium feldsparin ka- olinite veinletsand in kaolinite'filledcavities in potassicgranite, Kidwellite* Tonghua,southeastern Kirin, China The name is for the Chang- bai Mountain where the deposit is located.The type material is P. B. Moore and J. Ito (1978) Kidwellite, NaFers+ preservedat the Museum of Geology (where?GYC). G.Y.C. (OH)'nPO.)u.5H2O,a new species.Mineral Mag., 42, 137-140.

0003-oo4x/ 7 9 / 0| 02-0242s00.50 NEW MINERAL NAMES 243

Kidwellite occurs in moderate abundance as a late-stagemineral perfect,and {100}.The locality is Bergen,Vogtland, Saxony;the associatedwith rockbridgeite, dufrenite, beraunite, and strengite in mineral is associatedwith specularhematite. novaculitedeposits. lt has been found in severallocalities in the The name is for the composition Ph, Ur, Cal. Type material Ouachita Mountains, Arkansas, at Indian Mountain, Alabama, (RCM 13.388)is at the Mus6e royal de I'Afrique centrale,Tervu- Irish Creek, Virginia, and the Rotliiufchen mine, Waldgirmes, ren, Belgium.M.F. Cermany. Kidwellite is mostly found as mats or tufts made up of the finest feathery crystals. lt is lively pale chartreuse-green to Stibiopearceite greenish-yellow,greenish-white, and bright yellow with silky luster;H : 3. The tiny crystalsare monoclinic,elongated parallel L. l. Bochek, N. L Eremin, and V. M. Okrugin (1978) Stibio- to [010]with perfect{100} cleavage; a:20.61(7), b = 5.15(l),c = pearceite in ores of the Strezhan pyritic-polymetallic deposits, 13.75(6)4',B = 112.64(15)o,Z : 2:D (calc) : 3.349lcm3;diffrac- Rudnyi Af tai (in Russian). New Data on the Minerals of rhe tion symbol A*/*. The five strongest lines of the diffractometer U S S R (formerly Trudy Mineralog Muzeya Akad. Nauk pattern are: 9.41(100X100), 4.017(35X502), 3.813(40X302), sssR),26,l5-21. 3.413(55X602),3.193(40X51 | ). Optically biaxial, negative,with a : = : The name stibiopearceite is used first in place of anti- 1.787(5),8 I 800(5),7 1.80s(5),large2V,Bl lb, colorlessin monpearceite(Frondel, Am. Mineral.,48,565-572, 1963)and then fine needlesand not discerniblypleochroic. Analysis by Jun lto of to describean antimonian pearceite(As 6.00, Sb 1.9570),formula material from FodderstackMountain, Arkansas,gave PrOu31.3, (Ag,o There is no excusefor the use of the SiO, 0.27, Al,O, 0.98, Fe,O, 52.3, MgO 0.01, MnO 0.02, Na,O rCu,,)(As,,oSbo.,)S,,. name in either way. M.F. 1.60, HrO+ 13.3, HrO 0.3, sum 100.07Vo.The name is for Mr A. L. Kidwell of Houston, Texas,diligent student of the phosphate occurrencesof the Ouachita Mountains A.P. Vikingite*, eskimoite*, ourayite*, treasurite*, new data on schirmerite Manganhumite* Sven Karup-Mlller (1977) Mineralogy of some Ag-(Cu-Pb-Bi) P. B. Moore (1978) Manganhumite, a new species.Mineral Mag , sulfide associations. Bull. Geol. Soc. Denmark 26, 4l-68 42, 133-136. E. Makovicky and S. Karup-MSller (197'l) Chemistry and crys- tallography of the lillianite homologous seriesll. Definition of : : = Manganhumite,orthorhombic, c 10.54(l),b 21.45\2),c new minerals: eskimoite, vikingite, ourayite, and treasurite : 4.822(9)A, spacegroup Pnma, Z 4, (Mnou"MgorsFe.qlCaoel)7 Redefinition of schirmerite and new data on the lillianite-gusta- (OH)r(SiO.)i, is the manganeseanalogue of humite. Its type local- vite solid-solution series. Neues Jahrb Mineral Abh . 131. 56- ity is the Braltfors mine, Nordmark, VIrmland, Sweden.Mangan- 82 humite occurs in a skarn assemblagewith katoptrite, manga- nostibite, galaxite, etc., which replace manganosite grains in The mineralsof the lillianite homologousseries consist of layers magnetite-manganositeore. The mineral is biaxial (+), a : with galena-likestructure, separated by discoltinuous layersof Pb general 1.707(3),0 = 1.7t2(3),7 : t.723(3),2z(obs):37(4)', rlu per- atoms in trigonal prismatic coordination.The formula is ceptible,cleavage {010} perfect, H : 4, C =3.83(5).The strongest Pb"-1-r,Bir+"Ag,S,*2,assuming the substitutionAg+Bi for 2 Pb. lines in the powder pattern are: 1.777(10)(272),2.500(7Xl7l), All the mineralshave similar optical properties;their X-ray pow- 3.371(6Xl4l), 2.628(6)(33t), and 1.525(6)(0.14.0).Microprobe der patterns are also similar, so that identification is diflrcult analyseson 5 grains by C. E. Nehru gave SiO, 29.8, AlrO, trace, Vikingite: Ideal formula AgrPbrBi'"S".. Microprobe analysesof 5 MgO 14.2, FeO 0.98, MnO 57.1, CaO 0.34, PrOu trace, sum samplesgave Ag 7.9-8.9, Cu 0.2, Pb 27.7-30.4,Bi 45.9-46.8,S 102.42Vo.A.P. 16.5,sum l0O l-l02.l%o. Monoclinic, spacegroup B2/m or Bm, a : 13603, b = 25.248,c : 4.ll2A, 7 = 95.55", Z : l. The strongestX-ray lines(32 given ) are 3.40(10X260, l4 l ); 2.9l(5X280), Phurcalite* 206(8X660), 1.754(9). Weissenbergphotographs showed twinning (010). parallel were observed.Reflec- Michel Deliens and Paul Piret (1978) La phurcalite, on Twin lamellae to [001] 481 44.6-45.4;546,43.143.8;589, CadUOr)'(PO.)r(OH)n.4HrO, nouveau mineral. Bull. Minbral. tances at 4 wavelengths: nm, 42.5-43.2;644, 42. 1 42.8. Anisotropism distinct to strong, colors (Soc. fr. Mintral. Crisrallogr.), 101, 356-358. light gray to steelbluish-black. Hardness (50 g Ioad) 153-207,av. Probe analysisby J. Wautier, using analyzedmeta-autunite as 185+ 16.The mineralsoccurs in lamellargrains, av.0.5 mm, in the standard,gave P2Ou11.5, UOs 70.9, CaO 8.3, HrO by difference gustavite-cosalite-galenaparagenesis, Ivigtut, Greenland. The 9.3Vo. X-ray study showed it to be orthorhombic, space group name is for the Vikings, early settlersof Greenland. Pbca,a: t7.426,b: 16.062,c: 13.592A,2= 8,G (calc;:4 14, Eskimoite: ldeal formula AgrPb,oBi'"Sr..Microprobe analysisof (meas))4.03. The strongest X-ray lines ( l6 given) are two samplesgave Ag 9.7, 9.6;Cu 0.3, 0.2; Pb 28.8, 3O.4;Bi 46.7, 8.0s(100x020), 3.39(50x332,004), 3.10(80x52 1,2t4), 3.09(80) 44.8;S 16.2-16.4,sum 101.7,101.470. Monoclinic, spacegroupB2l (502),2.878(70)(s22) m or Bm,a: 13.459,b:30.194,c:4.100,{,7 :93.35',2: l. Phurcalite occurs as tablets flattened on [010] and elongated on The strongest X-ray lines (24 given) are 3,36(10X280), [001];crystals are up to lmm long. Color yellow, lustervitreous to 2 96(5)(290), 2.87(6X33I ), 2.05(5), 2.754(5). Weissenberg photo- nearly adamantine;H = 3. Not fluorescentin UV. The mineral is graphsshow twinnipg on (010).Twin lamellaeparallel to the c axis opticafly biaxial, negative,2V :68, a (calc) = 1.690,0 : 1.730 are often present. Reflectances:481 nm, 45.448.2;546,43.7-46.5; +0.001,"y : 1.749+0.001.Strongly pfeochroic,X bright yellow, I 589, 42.8-45.6: 644, 42.044.8. Optically indistinguishable from very pale yellow. Elongation positive. Cleavages{001} and {010} gustavite and vikingite. Microindentation hardness(50 g. load) wol -0n,4X/ 79 /0 | 02-0243500s0 2M NEW MINERAL NAMES

162-223,av. l9l +20. Thename is for theEskimos. orieinal settlers Analysesfrom Alpe di Suisi and Tsugawagave, respectively, of Greenland. SiO" 65.72,67.38;AtO' 12.15,12.65; Fe,O, 0.50, 0.27; MgO 0.08, = Ourayite:ldeal formulaAgruPbroBi.,S,or, Z 0.5. The average 0.03;CaO 1.65, 0.5 I ; SrO0.01, tr.; BaO0.06, 0. l3; Na,O4.47, 5. l5; of microprobeanalyses of I I grainsis Ag 12.5,Cu 0.5,pb 29.5,Bi K,O 1.87,0.97;HzO 13.50, 12.91 (l.58at ll0',9.85at400", l.48at 41.4,Sb 0.2, S 16.0,sum 100.170.Orthorhombic, space group 1000"); total 100.01,100.007o. These yield (NarueKoT,Cae.se = : = Bbmmor Bb2p, a 13.457,b 44.042,c 4.1004.The strong- BaoorMgo or) (Al. z"Feo.r'Sir,.r)OrE. l3.43HrO, and (Na, ,.Cao,u (24 "3Ko est lines given)are 3.36(t0X280).2.96(5)(290),2.87(6X331), BaoorMgo orXAl. ,rFeo o.Si,, ,6)0.8 ' l2.63HrO,or (Nar,Ca,Kr). u(Si, 2.05(5),1.754(5). Optical and hardness data could not beobtained Al){so,6.25-27HrO. becauseofthe grainsize. The mineraloccurs as laths less than 0.1 Unircell data:Alpe di Suisi,a = 18.47,b :'l .506,c -- 10.296A, mm long in a fine-grained(exsolution?) matrix of galena*matil- p = 108"22';Tsugawa,a : 18.641,b : 7.512,c : 10.299A, : ..beegerite," 0 dite, from a singlesample labelled Old Lout Mine, 108'29';Z = l. G (meas): 2.16,2.16; refractive indices (Alpe di Ouray, Colorado.The nameis for the locality. Suisi)a : 1.480,7 : 1.482;(Tsugawa)a = 1.471,"y : 1.477, Treasurite.Ideal formulaAgrPb.BiruSrr, Z : l.The averageof biaxial,negative,2V : 76-80', elongationnegative. The X-ray microprobeanalyses of 5 grainsis Ag 12.7,pb 19.6,Bi 50.5,S 16.4, powderdata for both samplesare very similarwith strongestlines sum 99.2Vo.Weissenberg photographs show the mineral to be (Alpe di Suisiand Tsugawa, respectively) 8.84(100),8.86(75)(200); monoclinic, : spacegroup 82/m, 82,or Bm,a 13.349,b : 26.539, 4.883(| 00), 4.878(92)(002 3.4s4(85 3.4s7(100')(220); 2.97 t(37 = ); ), ), c 4.092A,'y= 92.77",G (calc): 7.25.The srrongesrX-ray lines 2.e73(32)(602).M. F. (15 given) are 3,63(5)(260),3.49(10)(l3l), 3.22(8X270), 2.93(sX280),2.86(5X33 I ), l.eSe(6x660.6s0),t.es5(6) (56r,670,3.10.l). UnnamedCaMn.SiuOrs.2HrO Reflectanceand microhardnesscould not bedetermined because YoshikazuOhashi and R C. Erd (1978)A new pyroxenoid of fine grain size.Optically indistjnguishable from vikingite,eski- MnrCaSirO,u.2HrO:its structuralrelationship to , moite,or ourayite.Treasurite forms an lXl.5 mm aggregatein a babingtonite,nambulite, and marsturite. Geol. Soc. Am. Absftacts sample,formerly thought tci be schirmerite,from the Treasury wirh Programs,10, 465. Mine,Colorado. Microprobeanalyses gave SiO, 44.0, ALO, 0.04,MnO 4l .8,FeO Schirmerite(new data): Twenty-threenew microprobeanalyses 0.23,MgO 0.20,CaO 7.08,Na,O 0.15,HrO (microcoulometric) gaveAg 8.8-10.7,Pb 18.9-31.5,Bi 42.8-54.4,S 15.7-16.87o,the 5.28,sum 98.78Vo. Triclinic, PI,a = 9.738,b= 9.970,c:7.603A, compositionfield extendingfrom AgrpbrBirS,,to AgrpbrBirS,r. a = 109.78',0 : 93.96',7 : 104.97",Z : 2. Weissenberg photographsshow that schirmeriteis stronglydis- The mineraloccurs in chertof the Franciscanformation, Santa ordered, so that cell dimensionsand unit-cellcontents cannot be Clara County,California, associated with Mn ,quartz, cal- assigned. citeand harmotome.M. F.

Welshite* NEW DATA P. B. Moore (1978) Welshite,CarMg.FesrOrSi.BqO,r, a new memberof the aenigmatitegroup. Mineral. Mag.,42, l2g-132. Cannizzarite R. F. Litavrina,l. M. Pomanenko,and V. M. (1978) Welshiteoccurs as lustrous, subadamantine, thick prismaticred- Chubarov Cannizzarite(PbrBiosrs) from the Vysokogorsk dish-blackcrystals up to 3mm in greatestdimension with berzeliite deposit-first occurrencein U.S.S.R.(in Russian).Dokl. Akatl. Naaft and other rare mineralsin a dolomiteskarn at LAngban,Sweden. SSSR, 239, t207-t210. ftistriclinic,a : 10.28,b: l}.6g,c : 8.83,4.,a= 106.1,p : 96.3, 'y = : : 124.5", Pl with pseudomonocliniccell a. 9.68,b^ 14.77, Probeanalyses of 2 samplesgave Pb 30.7,31.8; Ag 1.9,1.5; Fe = : c^ 5.14A,A^ 101.5',c-centered. The streakis palebrown, H 0.1,-;Bi 49.3,49.0;Sb 0.6, 0.7; S 17.1,16.9; Se 0.8, 0.4; Te 0.1, 0.1: = : 6, fractureconchoidal, no cleavage,a l.8l(l), p : l.B3(l),28 sum 100.6,100.47o, corresponding to (Pb,Ag).r. (Bi, Sb)6oo(S, (obs) ca. 45o, optical sign not determinable,no noticeable Se),guuand (Pb, Ag),,r(Bi,Sb)"oo(S, Se)13_2e. X-ray powderdata . Microprobeanalyses (20 points on 3 crystals)gave and reflectancesat 9 wavelengthsare given.M. F. CaO 14.2,MnO 1.0,MgO 15.3,Fe,Os 9.1, Al2Os2.t,SiO, 19.6, AUO' 3.6, Sb2O624.8Vo; analysis by Jun Ito on 40 mg gaveBeO 4.07o;sum 93.l%o.The formula above, derived by analogywith the Deweylite aenigmatitegroup, gives G (calc): 3.71,(meas) : 3.77.Sub- stitutionof Tia+for Sb5+and of Al3+for Bd+ in the formulagiven D. L. Bish and G. W. Brindley(1978) Deweylites, mixtures of in the title leadsto the compositionof rh

can be assignedto deweylites,as they are mixtureswith various X-ray study showedsarcolite to be tetragonal,space group 14/ proportionsof the components.The nameis useful,however,.as a m, a : 12.343,c = 15.463A,Z : 4. Electrsnmicroprobe analysis field or "box" term,similar to the useof garnieriteand limonite. by G. Kurat and X-ray fluorescenceanalysis by L. Leoni gave, A.P. respectively,SiOr 36.5, 38.26; AtOs 17.8, 19.42;Fe"Os -, 1.06;FeO 0.3I, -; MgO 0.26,-; CaO 32.35,32.36; MnO 0.04,-; Na,O 4.05, not detd.;KrO 0.54,0.66;SOc -,0.12; COr possiblypresent; P2Ou -, Sarcolite 1.52;Cf -,0.027o;loss at 1100"2.2Vo. G. Giuseppetti,F. Mazzi,and CarlaTadini (1977)The crystal From thesedata and the structuralstudy, the formula is given structureof sarcolite:Tschermaks Mineralog. Petrog.Mitt., 24, as Na(Na,K),,Cao[AlrSi"On](OH,HrOl,,[(Si,P)O1]o.o(COs,CI)ou. t-21. M.F.

0nn3-m/.x/79 /01 02-0245$00.50