New Mineral Names*

American Mineralogist, Volume 62, pages 1057-1061, 1977

NEW MINERAL NAMES*

Mrcsesl FLelscHrR,Aooln Pessr, J. A. MlNoARrNo AND Gsoncs Y. CHlo

Archerite* Electronmicroprobe analyses on 39 samplesshow Cu 12.4-22.5, P. J. Bridge(1977) Archerite, (K,NHn)HrpO., a new mineral from Ni l9.l-36.5, Co 9.5-17.0,Fe0.2-1.2, S 38.3-417, with composi- Madura, WesternAustralia. Mineral. Mag , 41,33-35. tional range Cuo rrNir rrCoo.rFeoo,So oo to Cu, ,rNi, oo CoornFeo orSa oo. X-ray powder data for material with ratio Archerite occurs with biphosphammite, NHoH,pOn, (Am. Min- Cu:Ni:Co:Fe : 24:58.4:l7:0.7 showedstrongest lines (of 22 eral., 58, p. 806) and other phosphatesand salineminerals as a given) 2.87(m)(l l3), 2.39 (mX00a), 1.83(sXl ls), 1.68(VSX044), constituentof stalactitesand crustsin PetrogaleCave, 36 km east t.37 (m)(a4), t.2a @)Q3t),1.19 (mX800), 0.97 (m)(844),corre- of Madura. The tetragonalcrystals, up to 2 mm in length,have D spondipgto a unit cella = 9.520A,2 :8. Spacegroup is assumed 2.23,u | .513,e | .470,all closeto thoseof artificialKH,PO.. Partial to be Fd3m, but as with other members of the linnaeite group may analysis gave KrO 10.8, NH3 3.46 percent, corresponding to actually beF43m. The mineral is steel-gray, luster metallic. Hard- [Ko?1(NH4)or6]HzPO..Cell dimensionsare not reported but are ness(by Richard Hagni) 446-464 (25 g load), 368-446 (15 g load) close to those of artificial KH,PO., a 7.448,c 6 977 A, spacegroup kglsq mm. In reflected light creamy white, isotropic, reflectance 142d, Z = 4 Archerite is relatively soft, has no distinct cleavage,is (D. J. Vaughn) againstWTiC standardat 420 nm,36 4;500,42.5; white and water-soluble.The name is for Dr. Michael Archer, 546, 43.4;589,45.3; 640, 43.8percent. Curator of Mammals, QueenslandMuseum, who first drew atten- The mineral occurs in crystals ranging from less than I to 200 tion to the deDosit.A,P. microns, disseminatedin bornite, chalcopyrite, and digenite in copper-rich pods in the Fletcher Mine, Reynolds County, S.E Missouri. The name is for the mine. Type materialis at the Smith- Feroxyhyte* sonian lnstitution, British Museum, and Royal Ontario Museum. M.F. F. V. Csuxnnov, B. B. ZvvlcrN, A. I. Gonsnrov, L. P. Enur- r-ovn, V. V KonovussrrN, E. S. RuoNrrsreyn lNu N. yu. Yerueovsxnyn (1976) Feroxyhyte, a new modification of FeO(OH). Izuest Akad. Nauk SSR, Ser. geol., no. 5, 5-24 (in Gianellaite* Russian) George Tunell, J J Fahey, F. W. Daugherty and G. V. Gibbs (1977) a new mercury mineral. Neues Jahrb Min- It is shown that syntheticdelta-FeO(OH) consistsof two sub- Gianellaite, stances, both hexagonal, delta-FeO(OH), ordered, magnetic, and eral, Monatsh.,I l9-131. delta-FeO(OH),disordered or slightlyordered, and non-magnetic. Microchemical analysisby JJF on samples5-50 mg. gave Hg The latter, named feroxyhyte, for the constituents, has been found 83.6, SOn 8.5, N (by F. W. Brown) 2.9, Cl, MoO', H,O none, in iron-manganese concretions from the Pacific Ocean and from residue(SiOz) 0.2, sum 95.2 percent,corresponding to the formula the Baltic,White, and Kara gley Seas,and alsoin soils.Analyses of HgSOn.HgrN,, or (NHgr)r(SOa).Spectrographic study showed Si the synthetic material are given. The DTA curve shows endother- trace. The absenceof water was verified by infrared analysis The mic breaksat about l60o and about 320', the latter corresponding mineral is not attackedat 20-100" by HzSOn(l * l), conc. HNO3, to the loss of hydroxyl water. Infrared spectra are given. or HF. Decomposed by conc. HCI at room temperature Darkens X-ray data are given with detailsof the structure.The mineral is when heatedabove l30eC, turns white at 400'C, volatilizes.Pre- hexagonal,a 2.93, = c 4.60 A, Z l, G 4.20 calc.The strongestlines cession photographs showed the mineral to be cubic, spacegroup are2.54 (l0Xl00), 2.23(5Xl0l), (3)(102), 1.69 1.47(8Xt l0). The F43m,a : 9.5215A,Z = 4,G. calc7.l3, meas7.19. The strongest mineral is unstableand is transformedin air to goethite. X -ray lines (33 ) are 5.5 I I (8 X I I I ), 2.872 (10)(l l3), 2.743 (10)(222), Samples preserved are in the Fersman Mineralogical Museum, 2.37t (7)(004), t .67 e (7)(044), 1 .432 (7 )(226). Moscow. M.F. The mineral occurs as rosettes of flattened subhedral crystals, rarely as euhedral crystals0.2-1.0 mm. in diameter of distorted octahedra.Color straw yellow. H about 3. Isotropic, n 2.085.It Fletcherite* occurs in the Mariposa Mine, Terlingua district, Brewster County, J. R. Craig and A. B. Carpenter(1977) Fletcherite, Cu(Ni,Co)rS., Texas, associated with terlinguaite, calomel, montroydite, native a new thiospinel from the Viburnum Trend (new lead belt), Hg, and cinnabar, on fracture surfacesand in veinletsin limestone; Missouri. Econ. Geol., 72, 480-486. it is a late-formed mineral The name is for Professor Emeritus Vincent Paul Gianella, Mackay Schoolof Mines, Universityof Nevada. Type material is at the SmithsonianInstitution, Washington. * Minerals marked with an asterisk after the name were ap- Note. Gianellaite is very similar to mosesite in composition, proved before publication by the Commission on New Minerals differing in not containing Cl. The X-ray patterns are very similar; and Mineral Names of the International Mineraloeical Associa- gianeflaiteshows a line 1.449(4) not noted in mosesite.The unit tion. cell of mosesitehas a 28.618A.M.F, t057 I058 NEI'I/ MINERAL NAMES

Kusuitex heated for two hours in air at 900'C the peak was no longer observedon the DTA curve Mossbauerparameters of the mineral MrcHBr- Dsr-rrus lNo PeuL Prnrr (1977) La kusuite, are: Fe2+quadrupole splitting = 2.5mm/sec, chemicalshift = 1.25 (Ce8+,Pb'zn,Pbn+)VOn,nouveau mineral Bull. Soc.fr. Mineral. mmlsec; Fe3+ quadrupole splitting : 0.95 mm/sec and chemical Cristallogr., 100, 39-41. shift : 0.47 mm/sec. The Fe3+:Fe2+ratio derived from areas M icroprobe analysis gave V2O, 3 I .76, 3l .83; Ce,O. 35.20, under the peaks is l:0.65. IR (K Br pellets) absorption bands 36.41; PbO 17 22, 16.88;PbO, 18.46, 18.08;sum 102.64,t03.20 (cm-') are: lll0 (vw), 1040(vw),955 (vs),885 (m),830 (m), percent The lead was divided equally between Pb,+ and Pb.*, the 640 (w), 590 (w), 535 (vw), 510 (vw),460 (vw),410 (vw). The presenceof both having been found by E.S.C.A Qualitative spectrum for material heated to 700oC showed significant dif- tests showed no other cations, including La. The analysesgive ferences,suggesting that a phase changeoccurred. + (Cel+uoPbfr,Pb61.)Vo *Oo. The mineral is black, opaque,with pale-brownstreak and sub- X-ray study showed the mineral to be tetragonal,space group metallic to metallic luster, weakly to moderately magnetic. Crystals 14,/amd,a 7.35, c 6.564, a:c = l:0.8925,Z:4 G (calc) 5.30.The are thick tabular to short prismatic,usually 0.3 to 0.65 mm in size. : = strongestlines (20 given) are4.89 (50Xl0l ), 3.678(100X200), 2.766 Cleavages{100}, {010} perfect, {001} less perfect G 3.92,VHN (90Xll2), 2.s94 (40)(220), 1.891(70X312), 1.638(40)(a20). The 890 kglmm'zor 6.1 on Moh's scale. structure is of the zircon type. In ultra-thin-sections(several microns) the mineral is brownish The mineral occurs as black crystalsof max dimension I mm, red, slightly translucent with parallel extinction. In reflected light showing {l0l}. Streak rust-brown. Microhardness440 kglsq mm the mineral is gray, weakly anisotropic,with indistinct bireflec- with 100g load (= 4.5 Mohs). No cleavageswere noted.Optically tance and slightly heterogeneousextinction. Reflectances(sphaler- uniaxial, neg., birefringencestrong, refractive indicies ) 2.0, re- ite as standard) are: 2.39 (red), 13.43(green), 12.39percent (yel- flectances(Na) l7-21 percent.Color in sectionhoney-yellow. low). The mineral occursin the oxidation zoneofthe Kusu deposit,85 The mineral occursin a Precambrianmetamorphic iron deposit, km SW of Kinshasa,Zaire, associatedwith mottramite, chervetite, Lai-He Village, northeasternChina. It is commonly associated cuprite, dioptase,heyite, malachite,plancheite, and vanadinite. with quartz, hypersthene,and magnetite.The mineral name is for The name is for the locality. Type material is at the Mus6e the locality. G.Y.C. Royale Afrique Centrale,Tervuren, Belgium. M.F.

Luetheite*

Laihunite S. A. Williams (1977)Luetheite, CuzAlz(AsOoL(OH)..H,O, a new mineral from Arizona, compared with chenevixite. Mineral. Laihunite ResearchGroup, Guiyang Institute of Ceochemistry, Mag ,41,27-32. Academia Sinicaand GeologicalTeam l0l, Liaoning Metallur- gical and Geological ProspectingCompany (1976) Laihunite, a Luetheitewas found at a smallprospect in SantaCruz County as new iron silicate mineral Geochimica,2 ,95-103 (in Chinese with minute crystalsin silicifiedrhyolite porphyry with chenevixiteand English abstract). hematite. Duplicate chemicalanalyses averaged CuO 28.9, AlzOs X-ray laboratory, Guiyang Institute of Geochemistry,Academia l8 4, As,Ou 40.5, HrO 9.3 percent,sum 97.1, the remainder pre- Sinica (1976) The crystal structureof laihunite. Geochimica,2, sumably being insolubleresidue The monoclinic crystals,tabular 104-105(in Chinesewith Englishabstract). on {t00}, with maximum dimensions0.2 mm, have an apparent symmetry 2/m.The crystalsare indian blue inclining to greenish, Three chemicalanalyses gave: SiOr 3l.00,31.07,31.85;AlzOa H = 3, brittle,cleavage {100} distinct. Cell dimensionsare a 14.743, -, -, 0.065; Fe"O" 43.57,44.24, 45.07; FeO 25.50, 23.64,22.52; b 5.093,c 5.598A, B = l0l' 49', Z : 2, D (meas)4.28, (calc) 4.40, MgO -, 0.87,0.47; CaO -, 0,21, 0.47; sum 100.07,100.03, 100.45 diffraction symbol P2,/* . The strongest lines of the powder pattern percent, corresponding to Fe3**FeSlasioeooo,Fe?loFe3l"Mgo,u+ are: 3.498(10X310, lll); 7.208(7X200); 2.507 (5)(t20,510). The Sioeeoo, and Fe!.+o1Fefr.+.uMgoorSiorrOa respectively. Probe analysis refractiveindices are: a 1.752,P 1.775,1 1.796,22" (calc)88", showed homogeneousdistribution of Si and Fe in the mineral. ^r dispersionis moderate ) p a ll t0l0l,'y: [001] l0' in obtuseB; Spectrographicanalysis showed trace of Al, Mn, Cu, and Ba. feeblypleochroic in pale blue in thin section.The name is for R. D. The mineral is orthorhombic, Pb2,m, Pbm2 = or Pbmm,witha Luethe, geologist for the Phelps Dodge Corporation, who first 4 800 (5), b = 10.238 (5), c : 5.857 (5)A. The cell contains found the new mineral. 4(Fea+Fefr.+,SiOa)The strongest X-ray lines (26 given) are: 3.78 Luetheiteis the Al analogueof chenevixite,Cu,FedAsOn)z(OH)n. (6)(02r); (8X130); 3.47Q)(120);2.78 2.s20(t0)(022, t3r);2.405 HrO. Data are given for chenevixite from several localities. (6X200, (5Xla0); ('7)(240, powder tt2); 2.260 t.750 222).The Its cell dimensionsare: a 15.006,,5.189, c 5.724,0 : 102' 15', pattern differs from that of fayalite in relative intensities,extinction as determined on material from Las Animas, Sonora, Mexico. rules, and smaller /-values. The structure (in space group Pb2rm), A.P. solvedby multiple superpositionmethod usingtwo Pattersonpro- jections and by geometrical considerations, was confirmed by electron density projections. Intensity data used were obtained visually Nanlingite from CuKa Weissenbergphotographs, using a calibrated intensity Gu Xiongfei, Ding Kuishou, and Xu Yingnian (1976) A new strip. The structure is basically similar to that of fayalite except arsenitemineral from southern China. Geochimica,2,107-l12 that the four Fe3* atoms are ordered in two sets of two-fold (in Chinesewith Englishabstract). positions(corresponding Io M z in olivine,GYC) and the two Fe'z+ atoms are statistically distributed over a four-fold position (Mr in Chemical analysissupplemented by spectrographicand semi- olivine, GYC). Refinementof the structureis in progress. quantitative probe analysesgave: Na2O 1.81, CaO 11.74, LirO DTA curve showed an exothermicDeak at 7l3oC. For material l.22,MgO 25.04,MnO 0.21, FezOs7.09, AI,OB 0.98, As,Og 44.11, NETY MINERAL NAMES 1059

HrO 0.60,F 13.64,-O : F 5.74,sum 100.70 percent, correspond- Palladseite* ing to (Naor,.Cao rru) (Mg, sooLiororMno o,,Fel.3our)(As, ru, R. J. Davis,A. M. Clark andA. J. Criddle(1977) Palladseite, a FeflrrAloor,)05oe1 (OH)024?Fruur, or ideally CaMgrF, (AsO3)r. newmineral from ltabira, Minas Gerais,Brazil. Mineral. Mag., Spectrographicanalysis showed trace to strong traceof Be,Ba, Sn, 4t, t23. Mo, Ti, Si, Pb, Ni, Bi, Ag, and Zr. Single-crystalX-ray studiesshowed the mineralto be trigonal, Palladseite,Pd,rSeru, occurs sparingly in the residualconcen- R3m or R3m, with a = 10.24(5),c = 25.76(5)A,a,n = t0.42(5)A tratesfrom gold washing,associated with arsenopalladinite,iso- and a = 58" 50';Z,n = 5, Zrc* = 15.Strongest lines of partially mertieite,and atheneite. Individual grains are up to 0.5mm in size. indexedpowder pattern (60 linesgiven) are: 8.35(9Xl0l), 2.78 Electronprobe analysis gave Pd 55.77,Cu 3.99,Hg 1.66,Se 38.59, (10x303),2.42s (7)(3t2), 1.730(8Xs03), 1.69e (8X331), 1.460 sum 100.01percent. Palladseite crystallizes in the spacegroup (7)(517,50I0), Ll04 (6X7I8),1.079 (6)(722). Well-formed crystals Pm3mwitha 10.635,Z : 2, G (calc)8.15. For syntheticPd,rSe,, a are very rare; incompletecrystals showed well-developed basal : 10.606.In reflectedlight palladseiteis isotropic.It is whitein air pinacoidand poorly developedrhombohedron. Determination of andin planepolarized light, and a verylight gray in oil.The VHN the structureis in progress. at oneNewton is 414,range 390-437. A,P. Color brownishred; streak pale yellow; luster vitreous. Oxidized surfacesare dark brown. VHN = 107k9/mm2, corresponding to 2.3 on Moh's scale.G (obs) : 3.927,(calc) = 3.993.Under Perloffite* polarizing microscopethe mineralis deepred, transparent, uni- A. R. Knupp(1977) A newmineral: perlomte, the Fes+analogue : = axialnegative;

(Sb,T,AsoruTeoor)or FeSbr. X-ray study (Cu radiation) showed CaO 3.91,Na,O 0.85,KrO 3.00,H,Ot 10.94,sum 99.51percent. strongestlines (15 given) 2.81(10X012, ll0); 2.59(9)(lll); 2.03 Spectrographicanalysis showed Ba 0.I, Sr 0.01percent, and traces (8Xl2l, 013); 1.790(6X103, 122).This is calculatedto an ortho- of Cu, Ti, Mn. The analysiscorresponding to the formula rhombic cell with a 3.19 x 0.001.b 5.81 + 0.01. c 6.49 + .015,4,. (Ca,.zK, ,rNa1 ,,)(Al, 6Fef;+o"Mgo.o.)(Si,r 'Alo ze)Or? s.' 6.l4 HrO, With Z :2, G (calc) : 7.938.Under the microscopein reflected or (Ca,K,,Nar)Alr(Si,Al)'rOrs6HzO. The DTA curve shows a light the mineral is light gray with a rosetint. The mineral polishes broad endothermaleffect, with max. at 160o.The water is lost : well. Reflectancesare given at l6 wave lengths from 440 to 740 nm; continuouslyto 900o,total lossof weightto 900o l 1.23percent the curve pasesthrough a flat minimum (60.87o)at 520-580 nm; At 300",it loses7 55percent which is regainedin 5 hoursin moist 460,62.4:540, 60.8;580, 61.0; 640,62.7;'740,67 .l percent.Micro- air The mineralis not affectedby concentratedHCI' HNO,, or hardness251-380, av 332 kg/sq mm (9 measurements). HrSOr,but concentratedHF decomposesit, leavinga gelatinous The mineral occurs in the antimony ore depositnear Seiniijoki, residue central Finland; the ore is mainly nativeantimony. Antimony near X-ray studyshows the mineralto be orthorhombic,a 19.482,b the contact with vein mineralscontained inclusions of seiniijokite, 20.963,c 7 554A',Z : 4, G calc 2.174,meas. 2.166, 2.167.The antimonian westerveldite,breithauptite, altaite, and an undeter- strongestX-ray lines(25 given) ate9.74(23X200)' 9.24 (25)(120)' mined telluride. 8.83 (50X21 0), 4.87 ( 100X400),3.777 (24)(0f2), 3.440 (3eX l 60)' The name is for the locality. Type material is in the Miner- 2.e6t(2s)(170). alogical Museum, Academy of Science,USSR, Moscow M.F. The mineralis colorlessto snow-white,luster vitreous to pearly on cleavages.Three perfect cleavages at right anglesare visiblein Stillwateritet electronmicroscope photographs H-4. Opticallybiaxial, positive, rs (Na) a l.4Sl,P 1.452,7L483, 2V-23' , dispersionr 5 u,distinct, L J. Cnsnt, J. H. G. Llnuur.tt, J. M. SrBwenr, J. F. Rowl-lNo elongationnegative. eNo T. T. CusN (1975)New data on some palladium arsenides The mineraloccurs as spherulitesof diameter5-15 mm. in and antimonides.Can. Mineral . i,3. 321-335. veinletsof chalcedonyin brecciatedandesites, west of Zvezdel, In polished section, in air, the mineral is light creamy gray' easternRhodopes, Bulgaria. Associated minerals are ferrierite and shows no bireflectance,and is weakly anisotropic with color effects clinoptilolite(earlier formed) and mordenite(formed simultane- from dark gray to brownish gray. Under oil immersion, the an- ously). isotropy is distinctwith brownish-blackcolors and a blueto yellow- Thename is for SvetlozarIonchev Botev (1940-1971), Bulgarian brown tinge. Reflectance measurements (mean of four grains) mineralogist.Type material is in the MineralogicalMuseum, Uni- gave:51.6 and 527 percentat 470 nm, 52.5and 53,2percent at 546 versityof Sofia.M.F. nm, 53.1 and 53 7 percentat 589 nm, and 54.4and 55.0 percentat Tveititet 650 nm. The VHNro measuredfor sevenindentations on two grains lNo Heunlcs NruurNN is 384(360 to 416). SvsrNuttcBencsrdr-, B. B. Jsr.rsru (f977) new calciumyttrium fluoride.Lithos, 10, Electron microprobe analyseswere obtained on thirteen grains. Tveitite,a The analysisfor one of the type specimens(ROM No. M33559) is: 8r-87. Pd79.2: Ai 20.7;Sb, Te, and Sn soughtbut not detected;total 99.9 Analysisof a samplepurified by heavy-liquidand magnetic weight percent.This givesa formula of Pd, o,Ass... Another grain separationsgave Ca 2'1.4,Y22.2, rare earths 8 06,U 0.05'Mn 0.02' gives:Pd 78.2,Pt0.08,As 17.3,Sb0.7, Te I 1, Sn 3.0,Bi 1.3,total Fe 0 08. F 4 I .3, sum99. I I percent.The rareearths consisted of La 101.7weight percent.The formula derived from this analysisis 1.28,Ce 3.86,Pr 0.56,Nd 0.90,Sm 0.12, Eu 0'04,Gd 0.12'Tb 0.03' Pd?e5Ptooo (Asruo Sboo. Teoro Sno, Biom). The ideal formula is Dy 0.26,Ho 0.05,Er 0.17,Tm 0.13,Yb 0.35,Lu 0.19percent. A Pd(As,Sb,Te,Sn,Bi).. microprobeanalysis gave Ca 28.0,Y 22.7,Ce 4'1, F 46'3percent. Single-crystal X-ray study showed that stillwaterite is hexagonal This leadsto a formulaCar-,(Y,RE)"Fr*', where x is -0.3. with space group P3 or P3 The unit-cell parameters determined X-ray powder data (27 lines) are indexedon a pseudocubic from a Gandolfi film are: a :'7.399(4) and c = l0.3ll(15)A. The monocliniccell with a'3.924,b'3.893, c'5.525A, p 90.26"'but to unit cell contains 3[PdsAss].The measured density of synthetic index all the observedlines requiresa superlattice96 times the PdrAs. is 10.4 g/cm1. The calculated densities for stillwaterite and monoclinicunit cell.Further work is needed'The strongestlines synthetic Pd"As, are, respectively, 10.96 g/cms and 10.88 grlcm'. are 3.184(l0X0ll), 2.764(5)(t10,002), 1.963 (5X200)' 1.949 The strongest lines (in A) in the Gandolfi patterns are: (7X020),1.664 (6X013,121), t.26s (8X031,123). DTA studvshows 2.700(3)(022),2.3ss(8xl2l), 2.lls(l0xll4), 1.991(3BXl23),a sharpendothermic break at 670o(inversion); samples heated to l.3sl(5X233),and 0.88s8(4)(l6s). 800"C for 2 hours gave a fluorite pattern,a 5.528A' and the Themineral occurs as small anhedral grains (40 X 75to 120X materialdoes not invert to tveititeon cooling' 265microns) associated with gold,other palladium arsenides, and The mineralis white to paleyellow, luster greasy' Fluorescence silicatesin the Bandedand Upper zonesof the StillwaterComplex, in shortwaveUV faint yellow-orange.Optically biaxial' neg.,a Montana.The mineralis namedafter the StillwaterComplex 1.476P 1.479,1 1.481,2V 34o. Showscomplex polysynthetic Type material is preservedat the Royal Ontario Museum,To- twinning. ronto,and at theSmithsonian Institution, Washington. J.A.M' The mineraloccurs in a pegmatitedike at Hdydalen,Telemark, S Norway,associated with quartz,amazonite, microcline' musco- Svetlozarite* vite,beryl, and monazite. Tveitite contains inclusion of a mineral of the gadolinitegroup. M. N. M.cI-rsv(1976) Svetlozarite, a new high-silicazeolite Zap. The name(proununced to rhymewith late)is for JohnTveit' Vses.Mineral. Obshch., 105, 449-453 (in Russian). who found it in his quarry. Type material (one sample Analysisby L. Ivchinovaon 0.959of selectedmaterial gave SiO, l0X lOX5cm)is at the GeologicalMuseum, University of Oslo, 69.58,TiO, trace,AlzOg 10.26, Fe2O' 0.67, FeO none,MgO 0.30, Norway.M.F. NEW MINERAL NAMES l06l

Vertumnite* 6.9;Hg 2.'1,n.d.,2.3, 1.3,2.5: Cu 0.21,n.d., 0.13, 0.09, n.d.; As -, E. Pesslclrn lNo E. Gellr (1977)Vertumnite, a new natural 21.2,222,21.0,20.8,20.6; Sn -,0.31,0.26,n.d.: Sb -, -, n.d., silicate.Tschermak's Mineralog. Petrogn.Miu., 24, 57-66. n.d.,n.d.; Te n.d.,n.d., n.d., n,d., n.d.; Bi -, -, -, n.d.,-: total 101.25,101.2,99.54, 98,85, and 98.00weight percent. These data Chemicalanalysis gave: SiOr 2l.67,P2Oi0.20, Al,Os 24.83, CaO giveformulae which are very close to (Pd,Au,Hg,Cu,Pt)(As,Sn)r. 22.56, SrO0.64, BaO 0.16, Na,O 0.06, K,O 0.10,H,O- 5.96,H,O+ The mineralis orthorhombic(space group? J.A.M.) with a = 23.'74, percent sum 99.92 The formula may be idealizedto ll.26l(4),b : 3.857(l),and c : I 1.345(5)A. Strongestlines in the CaoAlnSioO.(OH)r1.3H,O. Vertumniteis monoblinicbut pseudo- Gandolfi pattern (in A for Ni-filtered Cu radiation) are: hexagonal,and is describedin the unconventional"first setting" 3.066(r0x2il), 2.718(6)(2t2), 2.433(s)(312),2.tr9(8)(2t4), : with a 5.744(5),b 5.766(5),c 25.12(l) A, y 119.72(5)";the 1.947(9X5I 0), and 0.777 0(9)(7 4s). diffractionsymbol is P2,/*, Z: l, G (meas)2.15(4), (calc) 2.15. The mineraloccurs with palladoarsenide,sperrylite, and chal- No discernihlecleavage, H:5, very brittle,fracture conchoidal; copyrite;with stillwaterite;and with an "unknown (Pd,Cu,As) solublein coldHCI Colorless,vitreous, a 1.531(l),01.535(l), r mineral"in theStillwater Complex, Montana. = 1.541(2),biaxial, negative,2V:62(5)',X: c,Z A b 16"in the The authorsfeel that the mineralshould not benamed until tvoe obtuseangle, no discernibledispersion. The fivestrongest lines of arsenopalladinitehas been reexamined. J,A.M. the powder pattern in order of decreasingspacings are: l2.sl(70)(002);6.275 (6s)(004);4.27s (16)(013, 103, il3); 4.187 (r00)(006);2.873 (l7xil0, I20,210). UnnamedPdrSb, Vertumniteoccurs as transparent,flattened, prisms, hexagonal L. J. CAsnret al. (1975)ibid. up to 4 mm thick,resting on tobermoritein a subsphericalgeode in phonoliteat Campomorto,Montalto di Castro,Viterbo, Italy. A singlegrain, 190 X 300microns, found in a samplelabeled Vertumnitehas obvioussimilarity of cell dimensionsand the "Copper Cliff Concentrate"from the Sudburyarea, gave electron strongestlines of the diffractionpattern to "hexagonalhydrated microproberesults identical to thosegiven by syntheticPdrSbg gehlenite"and the recentlydescribed mineral stretlingite, rhough (datanot given.JAM). The mineralis metallicwith a pinkishcast. its Si/Al ratioof unityis doublethat of theserelated phases. In polishedsection, it is palecream to white in air and in oil The nameis in honor of the mighty Etruscangod Vertumruts, immersion.No bireflectancewas observed. The mineralis moder- veneratedby the ancientEtruscan people who lived in the region ately anisotropic(reddish-brown to light gray) in air. Under oil wherevertumnite was found. A.P. immersionthe anisotropismis slightly strongerwith the same colors.Reflectance values (mean of four measurements)are 47.7 and 52.2percent at 470 nm; 49.7and 53.5 percent at 546nm; 50.9 Unnamedarsenate-sulfate of Pb. Fe. Cu and 54.6percent at 489 nm; and 52.6and 56.4percent at 650nm. Kunr Wer-rNrn(1976) Tsumcorite from the Michael Mine. Weiler Ten micro-indentationhardness measurements were made on syn- nearLahr, Black Forest.Aufschluss, 27, 373-3'19(in German). thetic Pd.Sb'and gaveVHNuo : 516 (501-545).Data from a Gandolfi pattern were indexedas hexagonalfa = 7.565(l), c The mineralwas found on thedump of thelead mine at Mola, 43.207(3\Alwith a rhombohedrallatrice. The strongestlines of the TarragonaProvince, Spain, as yellow to greenish-yellowearthy Gandolfi pattern (in A for Ni-filtered Cu radiation) are: crustson corrodedtetrahedrite. Qualitative tests shows it to be an 2.36e(4)(t2s ), 2.2e3(8)(r | .I s), 2.238(78X20. I4 ), 2.025(48 X I I .I 8), arsenate-sulfateof Pb, Fe, and Cu The ratio Cu/Fe appearsto be f.258(48X40)2), and 1.205(4X30.30).The calculateddensity is variabfe;green varieties contain more Cu. It hasns a I l.9l,y ) 11.32g/cms based on Z = 12. I .9I . Thestrongest X-ray lines (29 given are4.76 (8), (7), ) 4.53 3.28 The authorshave not namedthe mineralbecause its relationship (8),3.16 (8), 2.e6 (9), 2.86 (7),2.sr (10). M.F. to mertieiteII and syntheticPdaSbg is not clear.J.A.M.

UnnamedPdrAs, Unknown(Pd,Cu,As) mineral L. J. Clsnr, J. H. C LAFLAMME,J. M. Srswrnr, J. F. RowleNo ANDT. T. CurN (1975)New dataon somepalladium arsenides L. J. Cesnr et al. (1975\ibid. and antimonides.Can Mineral.,13. 321-335. Severalgrains ofthis mineralwere found and were nearly always In reflectedlight the mineralis palecream to creamin air and in associatedwith the unnamedPduAs, mineral. The mineralappears oil. No bireflectancewas observedin air, but varied from nil to to be an alterationproduct or a secondarymineral and has a pitted veryweak in oil. Theanisotropism in air variedfrom distinct(or or intergrowthtexture. It alsooccurs as a bandedintergrowth with moderate)to strong,with colorsvarying from gray (or dull gray) the unnamedPdrAs, mineral. The color is dull grayunder reflected to black(or brownish-black).The anisotropismand colorswere light. The mineral tarnisheswith time and exposureto air. Al- similarunder oil immersion.The reflectanceand bireflectanceare thoughthe resultsofelectron microprobe analysis were considered increasedin grains which contain Au substitutingfor pd. The unreliable,it wasdetermined that Pd was the major elcmentwith mineralis more reflectantand anisotropicthan stillwaterite. Cu and As in minor and nearlyequal quantities by weight.(The Electronmicroprobe analyses of fivegrains gave: Pd 70.1,79.0, mineralshould be referredto as an "unidentifiedPd-Cu-As min- 68.4,68.6, 68.0; Pt 0.24, n.d., n.d., n.d., n.d.; Au 6.8,n.d., 7.4, j.8. eral"JAM.) J.A.M.