American Mineralogist, Volume 62, pages 1259-1262, 1977

NewMineral Names*

MtcHe.rr-Flrlscsnn, Lours J. CesRrAND ADoLF Pe.ssr

Franzinite* Six microprobe analyses gave (range and av.): AsrOu 44.96-45.68,45.36; CuO 16.84-20.22,18.81; ZnO 16.78-18.57, Stefano Merlino and Paolo Orlandi (1977)Franzinite, a new min- 17.90;CdO l3 58-14.93,14.08; CaO 0.41-l.ll' 0.80; PbO 0.14- eral phase from Pitigliano,ltaly. Neues Jahrb. Mineral. Mon- 1.42,0.63: MnO 0.'79-1.27,1.07; sum 97 8l-99 54' 98.65 percent, atsh., 163-167. corresponding to (Cu,Zn,Cd).(AsOa), with Cu:Zn:Cd : 1.19: Microchemical analysis gave SiO, 32.44, Al2Os 25.21, Fe"O" Lll:0.55. The mineral is readily dissolvedby concentratedacids 0.04,MgO 0.14,CaO 12.08,Na,O 11.50,K,O 4.24,SOa 10.65, CO, X-ray study showsthe mineral to be monoclinic, 12' 154, Cl 036,H,O 1.88,sum 100.08- (O:Cl,) 0.08 : 100.00 Im. or 12/m, a ll.65, b 12.68,c 6.87(all + 0.01A)' B 98 95 + 0.05'' percent. "SiO, and AlrO, were determined by X-ray fluorescence, Z = 6, G calc 4.95 The strongest X-ray lines (46 given) are 6.41 (vvs) account being taken of the proper correction factor for S and Cl (MS) (020, l0T), 3.29 (vSXll2), 2.876 (vSX400), 2.79s and assuming that the weight percentages sum up to 100 0." (222, 321, 240), 1.644(MS). (max.0.25 X 0.1 X 0.04 mm)' This gives the unit-cell content: (Na1 urCa, uoMgoroFoo or) The mineral occurs as crystals to tabular showing forms (si3r3rAl2s 6s)o1ro(Son)r rr(co.), os(oH), nrclour. 4.31 HrO. It is a prismatic [001] {010}, {010}'{210}' {01l}' member of the'cancrinite group, compositionally similar to davyne perhaps {t0l}. {001} good. Color deep sky-blue, but differing in having sulfate as the dominant anion. pale blue H 3 Vr-4 Optically biaxial, sign and 2V not determined, greenish Weissenbergand precessionphotographs show the mineral to be a I 80, "y | 87, Y:b, strongly pleochroic, X pale blue, I/ = hexagonal, spacegroup P3ml, P3m1, or P321,a 12.884* 0.009, c blue, Z deep blue,absorption ZIY)X. Dispersionstrong, XAc 26 580 + 0.021.4 The strongestX-ray lines (32 given) are 3.81 l\Vz" (Cd red), llVz" (Hg yellow), l2Vz' (Hg green), 972' (Hg (42)(213),3.72 (r00X300), 3.59 (43X107), 3.s6 (39X214), 2 t48 violet) (2e)(330). The mineral occurs in cavities in tennantite ore from Tsumeb, The mineral occurs as squat pearly white prisms up to I cm in S.W. Africa, associatedwith schultenite and zincian olivenite. diameter.G 2.49 meas,2.52 calc. H : 5. Optically uniaxial posi- The name is for Charles L. Key, mineral dealer' of Canton, attention to the mineral. Type mate- tive, o 1.510,e 1.512.It occurs with afghaniteand liottite [lm. Connecticut, who first called Mineral , 62, 321, (1977)l in ejected blocks in a pumice deposit, rial is in the British Museum, London. Pitigliano Tuscany, Italy The name is for Marco Franzini, profes- Note Keyite is similar in composition and appearanceto stranskiite sor of mineralogy, University of Pisa, Italy. Type material is at the lAm. Minerat.,4J, l3l5 (1960)1,but the symmetryand strongestX- University of Pisa and University of Modena. M.F. ray lines are different. M.F.

Hexahydroborite* Leiteite*

M. A. Simonov, N. A. Yamnova, E V. Kazanskaya, Yu. K F. P. Cesbron, R. C. Erd, G. K. Czamanskeand Helene Vachey Egorov-Tismenkoand N. V. Belov (1976)Crystal structureof a (1977) Leiteite, a new mineral from Tsumeb. Mineral. Record,8, new natural borate, hexahydroborite, CaBzOr.6HrO = 95-97. Ca[B(OH)n],.2H,O Doklady Akad. Nauk SSSR, 228, 1337-1340 Electron probe analysesgave Zn 23.6,23.6, As 53.7, 53.4 per- (in Russian). cent; microchemical analysis gave ZnO 28.5, FeO 0 5, AszOa7l .4 X-ray study showed the mineral to be monoclinic, space group percent, corresponding to ZnAsrO. (zinc arsenite)' DTA and TGA P2/a, a 8.006,b 8.012,c 6.649A,7 104.21",Z = 2, G calc 1.88. curves are given. When the mineral is heated, part of the AsrOr is Structural details but no powder data are given. Crystals are color- lost, part is oxidized [formation of Znr(AsOo)r]. The DTA curve in peak 507o(loss of AsrOe)and a less They occur with pentahydroborite [Am. Mineral., 47, 1482 air shows a small endothermic at (1962)l at the Solongo deposit, Urals. large one at 5'16":in N, there are 2 endothermic peaks at 500o and Discussion 546o. Incongruentmelting occurs at 900-1000"C. It would be better to publish the full description ofthe mineral. The mineral is monoclinic, pseudo-orthorhombic, space group : M.F. P2,/a, a17.645,b5.019, c 4.54'7A, 0 90"59',Z 4,G calc4.61, obs 4.31. The strongest X-ray lines (30 given) are 4.833 (3lXll0)' Keyite* 3.320(39XTll), 3302 (32Xll l), 3t63(76)(2tl ), 3.133(100x211), 1.685(49Xell). P. G. Embrey, E. E. Fejer and A. M. Clark (1977) Keyite: a new The mineral occurs as a single specimenin cleavablemasses, 7 X mineral from Tsumeb. Mineral. Record. 8.87-90. 4 X 0.3 cm. It is colorless to brown, luster pearly on cleavages,H lVz-2. Cleavage {100} perfect, cleavagelamellae flexible, inelastic' *Minerals marked with an asterisk after the name were ap- somewhat sectile.Optically biaxial,a 1.87,B 1.880'7 1.98'2 V: proved before publication by the Commission on New Minerals -l26Vzo,Y : b, XLa = llo, Zlrc = l0', r < u very strong. and Mineral Names of the International Mineralogical Associa- The mineral occurs associated with tennantite, chalcocite, *ron smithsonite, and schneiderhdhnite at Tsumeb, S. W. Africa. The t259 t260 NEW MINERAL NAMES name (pronounced la'tit) is for Luis Teixeira-Leite, mineralogist, honor mining enterprisein the Noril'sk region. Majakite samples Pretoria, S W. Africa, who first found it. Type material is at the are preservedin the MineralogicalMuseum, Academy of Sciences, SmithsonianInstitution, British Museum, and the Paul and Marie U.S.S.R., and in the mineralographiclaboratory, IGEM, Acad- Curie University, Paris.M.F. emy of Sciences,U S.S.R

Discussion Machatschkiite* It is not clearwhether the calculateddensity of 10.5g/cm3 is for K. Walenta (1977)Machatschkiit, ein neuesArsenmineral aus der the mineral or syntheticPdNiAs, using the cell parametersof the Grube Anton im Heubachtalbei Schiltach(Schwarzwald, Bun- mineral Recalculationgives 10.3,l0 2, and l0 4 g/cml for analysis desrepublikDeutschland). No I, analysisNo. 2, and syntheticPdNiAs Also d(calc)(002) : Tschermaks Mineral. Petrogr Mitt., 24, 125-132 3 60 and (ll0) : 3.034, slightly different from reported values. L.J.C. Chemical analysis, following recalculation, gave CaO 29.5, As,Ou40 8, SOr 0 5,H2O 29.2,sum 100.0percent, in good agree- ment with the formula Car(AsOo),.9HzO. Machatschkiiteis rhom- Sarabauite bohedral, the characteristicform being {10T21;the dimensionsof Izumi Nakai, Kichiro Koto, Kozo Nagashima and Nobuo Mori- the hexagonalunit cellarea 15.10,c2259 A,Z = 12,G :2.50. moto (1977)The crystal structureof sarabauite,CaSb,oO,oSu, a The diffraction symbol is RE*. The strongestlines in the powder new oxide Letters (Japan),275-276 patrernare 8 59(t0x0lT2). 5.34 (8x I t23).3 59(sxt34t). Chemistry (in English). Machatschkiitedissolves readily in dilute HCI or HNO. There is no cleavage, is conchoidal, H : 2-3 The mineral is The mineral, from the Sarabau mine, Sarawak, Malaysia, is : colorless,translucent to transparent,weakly biaxial negative,€ monoclinic, a 25 33, , 5.655,c 16.88.4,B ll7 5l', Z = 4, space L585(2)c.r = 1.593(2)It occursas a secondarymineral in crustson group C2/c, G calc 4 99 Atomic coordinatesare given. granite with , ,, and sarn- feldite. Discussion The name is for the late Felix Machatschki,professor of mine- Seecomments under velikite M.F. ralogy successivelyat Tiibingen, Munich, and Vienna. A.P.

Velikite Majakite* L. N. Kaplunnik, E. A. Pobedimskayaand N V Belov (1977)The A D Genkin, T. L. Evstigneeva,N. V. Troneva and L. N. of velikite, Cu. ruHg, ,uSnrS".Krislallografya, Vyal'sov (1976) Majakite, PdNiAs, a new mineral from copper- 22, 175-177(in Russian). nickel sulfide ores.Zap Vses.Mineral Obshch.,105,698-703 (in Microprobe analysis by V. S. Gruzdev gave the formula Russian). (Cu316Hgr ,rZn, nn) (Snr orSboor)S. rn (analysis not given). "oAso Microprobe analysesof two grains gave Pd 41.3,41 2; Ni 27 0, Single-crystalstudy showed the mineral to be tetragonal,space 27.4; As 31.0, 30.9; sums 99.3, 99 5, correspondingto Pdo,,Ni, o. group l4/mmm, a 5.542 + 0 003, c 10.908+ 00074., G meas5.59, Aso", and Pdoe2Ni.oAso""(recalculated on basis of 3 atoms by G calc 5.48, Z = | The structure is that of stannite, with Hg L.J.C ) The ideal formula is either PdNiAs or (Pd,Ni),As. Traces occurring in 7/sof the Fe positions The strongest X-ray lines (46 of Bi were found (not. quantified) and other elements,with detec- given) are 3.17 (100)(ll2), 1.958(23)(220), I 941 (80)(204),I 671 tion limits 0.1-l weight percent,were not detected. (40)(312), 1.646 (35X303), 1264 (25)(413).The mineral is dark The X-ray powder pattern compares closely with that of syn- gray, with metallic luster- thetic PdNiAs and was indexedas hexagonala : 6 066,c : 7.20A: strongestlines for the mineral are 2.65 (10X2020),2 30(5)(l 122), Discussion = 2.19(7X10T3),1988(10)(1230). For Z=6, p(catc) 10.5s/cmo This is another example of the recent tendencyto publish the : and p (meas) 9 33 E/cmt for synthetic PdNiAs. crystallographyof a new mineral without the descriptionof the Majakite was found only as intergrowthswith other platinum- mineral, as recentlydone for christite,slawsonite, bahianite, sara- group minerals in the chalcopyrite and talnakhite ores of the bauite, and hexahydroborite.The presentexample is particularly Majak mine, Talnakh deposit Majakite often occurs as rounded unsatisfactory;no explanation is given of the divergenceof the or oval inclusions(0 001-0.lmm) in polarite and also as inter- formula derived from probe analysisand that deduced from the growths with stannopalladinite In some casesit occursas part of structure,and nothing is said of the occurrence,except that it is more complex intergrowths containing a large number of plati- from the Khaidarkan deposit.M.F. num-group minerals. In reflected light majakite appears grayish- white, but it is lilac-gray when intergrown with native silver, dis- tinctly rosy with a soft lilac tint with polarite, and grayish-white Urvantsevite* with a greenish tint with stannopalladinite. was not N. S. Rudashevskii,V N. Makarov, E M Mededeva, V V. observedin air or in oil. It is weakly anisotropic,with no visible Ballakh, Y. I. Permyakov,G. A. Mitenkov, A. M. Karpenkov, color effects Reflectance (percent) 440nm 47.4, 460nm 49.0, I. A. Budk'ko and N. N. Shishkin (1976) Urvantsevite,Pd(Bi, 480nm 50.5, 500nm 51.2, 520nm 52.3,540nm 52.8, 560nm 54.4, Pb)r, a new mineral in the system Pd-Bi-Pb. Zap Vses Mineral 580nm 55.2, 600nm 55.8, 620nm 56.1, 640nm 56.7, 660nm 58.0, Obshch, 105,704-'709(in Russian). 680nm 57.9, 700nm 58.5, 720nm 59.0,740nm 59.2.VHN,' : 526 (av for 3 samplesand 14 meas).Hardness on Mohs scale-5. Microprobe analysesofseven grains gave Pd 20.0-20.9,av.20.5; The mineral is named after the Majak mine, Talnakh deposit, to Bi 64.1-65.0,av 64.6;Pb l5.l-15.7,av. 15.3,sums 99.4-101.4, av. NEW MINERAL NAMES 126l

100 4 percent, corresponding to Pd' ooBi'61Pbs 36, or Pd(Bi,Pb)r. is yellow and fluoresces bright yellow-green in UV It is decom- The X-ray powder pattern(18 lines)was indexedon a hexagonal posed by . Optically negative,nearly uniaxial, a 1.496,7 cell a 13.82(l), c 6.53(l)A with strongestreflections 2.643(10) 1.512(both + 0.002), weak, X colorless,Z yellowish. (2132), 2 372(8)(2242),2.043(5)(5161), r.420(7)(7r82), The strongestX-ray lines (50 given) are 10.84(10),9.80 (8),9.08 | .33s(s)(1 292), l .l 66(6X5.5.1 0. 3), 1.1 | t(7 )(9 2. | 1.2). (5), 7.8e (e), 7.03 (7), 4.8s (7). Urvantsevite was found in the massive pentlandite-cuba- mineral B may be a variety of or a different hydrate of nite-chalcopyrite ores in the roof oi the zoned sulfides of the mineral A, which it resemblesin form, color, fluorescence,and Majak mine, Talnakh deposit, at the contact with taxitic gab- qualitativechemistry. Optically biaxial, neg.,2V -30",a 1.476,7 bro-dolerite These sulfide ores are enriched in lead minerals (ga- 1.496(both + 0.002),pleochroism weak, X colorless,Z yellowish. lena, altaite, shadlunite) and in platinum-group minerals. Ur- The strongestX-ray lines (58 given) are 10.79(9),9.80 (10),8.52 vantsevite occurs in irregular polymineralic intergrowths up to 4 (7),7.70(ed), 6.42(6), s.27(5) 4.85(7 d),4.2e (6), 3 06 (6), 2.88 mm in size. The central part of such intergrowths usually consists (5). of unnamed (Pd,Pt,CulSn bordered by consecutive intergrowths Uranium mineral C occurs in pale yellow long-prismatic crys- of froodite and urvantsevite (as irregular rounded or elongated tals, apparently triclinic. Twinned. Fluorescencelike that of miner- gains 0.1-0.4 mm), sobolevskite(?),followed by paolovite, native als A and B. Optically biaxial,neg ,2V l'l-2'7", variable,extinction silver and an outer rim of intergrown altaite and galena. - 28", a 1.473,1 1.490(both + 0.002).Microchemical testsalso Urvantsevite polishes well and has a very perfect cleavagein one show Na, Mg, U, borate, sulfate The strongestX-ray lines (48 direction. vHNs = 53(4), VHN'o = 50(2), VHN'o = 38(3). In given)are 9 88 (10,d), 7.98(8),7.42 (6), 4.87(6), 3.91 (6), 3 67 (5), polishedsection urvantsevite is grayish-white,usually darker than 2.84(5,d) M.F. froodite, and when intergrown with sobolevskite(?) a greenish- yellow tint is noted. Urvantsevite is weakly bireflectant and slightly Unknown (Pd,Ni,As) mineral with no visible effects. Reflectance(%) for R'g anisotropic, color L. J. Cannr et al. (1975) ibid. and R'p 440nm 48.7 and 50.5, 460nm 53.2 and 54.9,480nm 54.6 and 53.8, 500nm 54 I and 53 3, 520nm 54.8 and 53.7, 540nm One grain of this mineral was found in a complex intergrowth 55.2 and 54.0, 560nm 56.2 and 54.9,580nm 56.7 and 55.2,600nm with kotulskite, an "unnamed (Pd,Cu,As) mineral", and palla- 57.6and 56.1,620nm58.3 and 56.8,640nm59.2 and 57.8,660nm doarsenidefrom the Stillwater Complex, Montana. lt is light yel- 60.1 and 58.6,680nm60.9 and 596,720nm 61.3 and 59.6.The low to grayish under reflected light in oil immersion. It is either mineral is etchedby HNO.(l: l) to an intensedark brown, black- isotropic or weakly anisotropic. Electron microprobe analysis ens with concentratedHNO.. l0 percentFeCl blackensthe min- gave:Pd 48.6,Ni 17.4,As 32.7,Te 0 38, total 99.08weight percent. eral while a l0 percentKCN + 5 percentNaOH solutionbrowns it Thesedata suggesta formula of (Pd,Ni),(As,Te)or PdNi(As,Te). slightly The mineral is named after ProfessorN. N Urvantsev who first Discussion discovered the Noril'sk deposits. Polished sections with urvantse- I would like to object to the use of terms such as "unknown vite are preservedin the Mining Museum of the Leningrad Mining (Pd,Ni,As) mineral" or "unnamed (Pd,Cu,As)mineral" on several I nstitute. grounds.First, ii the mineral is beingstudied itis notunknown;itis perhaps unidentiJied.The term "unknown" is used in this way by Discussion many mineralogists(this abstractor included), but it should be The calculated density is 9.69/cmx, but was not reported by the avoided A much more important objection is the form in which authors. This value is rather low when compared to froodite the elemental symbols are given. At first glance,the expression (ll.5g/cm3). The mineral's powder pattern was indexed without (Pd,Ni,As) impliesa nativepalladium with minor nickel and arsen- '!unidentified single-crystalstudies, as singlecrystals were not available.This is ic in substitution. I would suggestthat Pd-Ni-As unfortunate in view of the close chemical relationship to froodite, mineral" might better convey the proper relationship. especiallysince synthetic experiments were not made to determine With regard to the formulae given by the authors, some other whether, indeed, the mineral is a new species in the ternary rnterpretationsare possible.If As * Te is taken as I 00, then the Pd-Bi-Pb system. The following are corrections which should be formula is Pd, ooNio u, Asor. Teoor The value for Ni suggeststhat a made to the powder data: d(calc)(0002) : 3.265,(3250) : 2.746, better sum for As * Te would be 3 00, which gives a formula of (8080) - 1.496A. and kht for l.l87A is (4484) not (4482).L.J.C. PdB,, Ni2o, Asr* Teoor- This could be interpreted as either PdrNi,As, or (Pd,Ni)uAsr J.A.M.

Unnamed Na-U-borate sulfates, unnamed Mg-borate Discredited Minerals Kurt Walenta (1976) Uranium minerals from the Schildmauer Nenadkevite = a mixture gypsum deposit near Admont, Styria. Milteilungsbl., Land- esmuseums"Joanneum", Abt. Mineral , 44,35-41 (in German). E V. KopcusNovn, A. S. AvtoNtN, G. A. StnonrNro eNo G. A. DusrNcHux (1976) The problem of nenadkeviteas a mineral The mineralswere found as incrustationson anhydrite,gypsum, species. Sbornlk Nauchn. Trud , Mosk. Otdel, Vses. Mineral' hexahydrite, starkeyite, and loeweite. Obshch.,March, 1974,38-40 (in Russian). The magnesium borate occurs in more or lesscolorless crystals, apparently orthorhombic. Microchemical tests showed borate, Nenadkevite, a uranium silicate,was describedin 1956 [Am. Mg, and a little Na. Optically biaxial,neg., 2V-30", r 1 u,a 1.442, Mineral ,42,441442(1957)1,where I commented"an unnecessary r 1.504,both + 0.002 The strongestX-ray lines (31 given) are name for what is probably a variety of coffinite." Reexamination I 2.08(9), 7.60(r0, d), s 29 (7),3.93(8, d), 3.09(6), 2.68(9). of "ore and museum samplesof nenadkevitefrom severalPre- Uranium mineral A containsNa, Mg, U, borate,and sulfate.It cambrian ore showings" by microprobe analyses(13) and X-ray t262 NEW MINERAL NAMES data show them to be mixtures of (relict), boltwoodite, nik Nauchn. Trud., Mosk Otdel Vses. Mineralog Obhsch, and "uranium hydroxides." March, 1974,25-28 (tn Russian) Discussion T M AMrcHenlNo L. S. DusnxrNn, Wolframo-ixiolite in oresof It is not statedwhether any of thesesamples is from the never- tin-tungstendeposits of Yakutia Ibid, ll-18 identifiedtype locality M.F. Wolframo-ixiolite was described in 1969 lAm Mineral., 55, New Data 318-319(1970)i: the mineralwas not acceptedby the IMA Com- missron The first paper cited above reexaminestype material and Deerite givesinfrared data, indicating the presenceof hydroxyl and of H.-R WrNr, R N. BrncroNr,J. HsrAo, D. L. Lrr. F. L TnN- nrolecularwater. It also gives electron microprobe traversesthat zsr-rn, S M YrH, K. Hoocsol AND H. U NrssrN (1976) showsmall amounts of microcline,ilmenite, zircon, and rutile.and Deerite, (Fe,Mn),,Si.(O,OH),,, yet another type of chain sili- of a major phase containing Nb, Ta, and Mn, but no W The cate N aturwissenschaften, 63, 433-434. conclusion:"As to whetherwolframo-ixiolite is a new mineral with formula (FeorMnorNbo.Tao,Wou)O,or an unusuallyclose inter- "The pseudosymmetricspace group of deerite in which the growth of two minerals,(Fe,Mn)WO, and (Mn,Fe) (Nb.Ta),O", average structure has been determined is Pnma (a : 18.872, = b remainsan open question.' 3 186,c : l0 278,4).By a superstructure,b is tripled (9.558A)and The second paper gives two electron probe analyses of the cell showsa slight monoclinicdistortion (a = 90.43"),suggest- homogeneousinclustons in cassiteritefrom a Sn-W deposit of ing that the true spacegroup may be P2, or P2,/n (noticethat the Yakutia One of these,referred to as wolframo-ixiolite,containing monoclinic axis is not .y = fiber axis, as previouslysuggested). Nb,Oo38 I, Ta,O, 109, Sc,O,4.0,WO3 27.9,TiO,06. SnO,2. From new microprobe analyseswe came up with a tentativefor- MnO I20, FeO 3 5, UO, I percent,leading to the formula mula Fe,,r"Mno.,Si, (O,OH)., (considering a density of 3 837 (Nbo.rTao,rWo r"Sco ,nMno n,Sno orUo o,)Oo g/cm'). In contrast to the original description,no Mg and only tracesof AI could be detected." Discussion Ktenasite X-ray data are required, but even if this is an ixiolite, it is a tungstenianvariety, and the name is unnecessaryM.F. G Raade, C J. Elliott and E. E. Fejer (1977) New data on ktenasite.Mineral Mag., 41, 65-70. Discussion Yuksporite The probe analysisis not given The formula as given is unsatis- E. V Vlasova and L V Kozyreva (1976)The infra-red specrrum factory since it does not indicate that approximately equal ofyuksporite and the position of the mineral in the titanosilicate amounts of Fe'+ and Fe3+are oresent M.F. group. Sbornik Nauchn Trudou, Mosk. Otdel, Vses. Mineral Ohshch, March 1974,29-31 (in Russian). Ktenasitefrom Glomsrudkollenzinc mine, Modum, Norway, is Yuksporite was describedby Fersman(1923) Mineral., monoclinic,spacegroup P2,/c,with a 5 598,b6.121,c23.762 A,B lAn 12, 58 (1927)l as a hydrous silicateof Ca, Na, and K Four later 95.55'. The formula, calculated from an analysis, is analysesby Kostyleva(Mineralog Abstr 3, lll-l l2; d, 285),show (Cu, uZn,.)(SO.),(OH). 6H"O; Z : 2, G (calc) 296, (meas) 294. considerablevariation of SiO, (37.2-554), TiO, (4.1-15.4),CaO Ktenasite is biaxial negativewith a (colorless) 1.574,d (bluish -y (18 8-23 4), Na,O (5.1-129), K,O (2.5-8.0),and HzO (7.8-56E"). green) I .6| 5, (light green) | .628,2Va 59. The strongestlines of The presentpaper gives a new completeanalysis (SiOr 39 16,TiO, the powderpattern are I I 82 (100),5.93 (85),4.85 (90), 2.955 (50), 9.04,CaO l4 70,SrO 3.39,BaO 7 52,Na,O 6.16, K,O 7 13,H,O + 2 785 (60), 2 688 (60), 2.655 (50), and 2 584 (70). In the initial 2 84Vo).The infrared spectrum indicates that yuksporite is not description (Am Mineral , J6, 381) the a axis dimensron was related to nor to xonotlite, but may be related double that now reported and the record of the powder parrern to the group and bafertisite. The formula is given as included many lines not attributableto ktenasite A.p. (Na,K), o,(Ca,Sr,Ba), o" (Ti,Al,Fe)ou. Siroo (F,Cl)0u,.0.79H,O.

Wolframo-ixiolite D i.st'ussion I D BonNrvnN-SrnnvNrevrclr, E S. Runurrsrnvl, T. L Losrvr Apparently a valid species.Better X-ray powder data and a unit- nNo V. S. AvrLrNn (1976)Once agbin,wolframo-ixiolite. Sbor- cell determinationare needed M.F.