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JOURNAL MINERALOGICAL SOCIETY OF AMERICA 131 NEW MINERALS: NEW SPECIBS CLASS: PHOSPHATES.ETC. Sincosite. War,nnuen T. Scuerr,un; The Occurrenceand Propertiesof Sincosite,a new VanadiumMineral from Peru. Am. Jott. 9ci.,8,462, (1924).(Preliminary note in f our. Wash.Aca.d.. Sc'i.,12, (8), 195,1922. Cf. Am. Min.,7, 163,1922.) New: From the locality, Sincos,Pent. Csnurcar- Pnoprnrrrs. A hydrous vanadyl, lime phosphate, VzOr. CaO. P2O6.5H2O. Analysis: V2O436.3, VrO6 0 0, CaO12.1, P zOr31.7, HzO 19.9,insol., 0.3; sum 100.3. Solublein dilute acidsgiving a blue solution. Cnvsu.lr,ocnepRrc Propnnrrns. Tetragonal, basal plates bounded by the prismc (100).Basalplanestriatedparalleltotheedges. Twinningplane m(ll0). Psvsrcer, ANDOprrcAr, Pnopenrrcs: Color leek green. Uniaxial, but some crystalsare biaxial with 2E varying. Negative. e:1.655, o:1.680. Dispersion strong p)2. Pleochroismstrong, €:nearly colorlessto pale yellow, o:gray green. Plates changefrom uniaxial to biaxial with 2V as high as 83o. Dispersion increasesvrith 2E. a:1.675, 9:1.690,7:1.693. The biaxialphase is probablya lowerhydrate. Sp. Gr. 2.84. Cleavagebasal and o (100)good, rz (110)poor. Occunruwcr: Found in a black carbonaceousshale associatedwith black nodules of coaly material. Drscussrol.r: Believed by Schaller to be a member of the uranite group, to- getherwith torbernite and metatorbernite,which the sincositegreatly resembles. W. F, Fossle CLASS: PHOSPHATES.ETC, Dumontite. Ar,r'r-ao Scnotp: La Dumontite, nouveau Min6ral radioactif. (Dumontite, a new radioactivemineral). Compt.Renil., 179,693 (1924). Neur: In honor of Andr1 Dumont, Belgian geologist. Cururcar, Pnopnnrrrs: A hydrous phosphate of lead and uranium, 2PbO. 3UOe.PzOs.SHzO. Analysis: HzO 5.78,PgOr 8.65, UOa 56.49,PbO 27.19,TeOs 1.01;sum 99.12. Cnvstr.t tocnepurc PRo"ERrrEs: Probably orthorhombic,prismatic, flattened paralleltotheaaxis.Forms: (001), (010), (100), (013), (011). c:b:1.327 (approx.) Pnvsrcal erw Orrrc-Lr,Pnopnnrms: Color yellow. Streakyellow. Translucent. Biaxial with 2V large, positive. Plane of the optic axesparallel to the elongation. n greater than 1.78. Extinction parallel. Pleochroismstrong, Z:deep yellow, )f :pale yellow. Occur.r-eNcn: Found in pockets in torbernite from Chinkolobwe, Belgian Congo. W. F. F. 132 THE AMERICAN MI NERAINGIST CLASS: SILICATES Sklodowskite Ar.rrrno Scuonp: La Sklodowskite,nouveau Min6ral radioactif. (Sklodowskite, a new radioactive mineral). Compl.Renil., 179,413 (1924). Neue: fn honor of Mme. Curie-SftXod.owska. Cnrutcer- Pnopnnrms: A hydrous silicate of uranium and magnesium,MgO. 2UOr. 2SiOr. 7HzO. Analysis: HzO 13.41,SiO, 14.28,UOa 64.72,MgO 3.74, TeO31.08, NarO+K2O 1.79,NiO 0.20;sum 99.40. Analysison materialshown to be hornogeneousby microscopicexamination. Cnvsrerrocnepnrc PnopnnrrBs: Orthorhombic, prismatic, Psvsrcar,'eNnOprrcar, Pnopnnrrns: Color, palelemon yellow. Brilliant luster. Translucent. Streakyellow. Pleochroism,7:yellow, y:pale yellow, X:color- less. Biaxial, negative. Dispersion distinct. (Plane of the optic axesacross the prisms.)o:1.613, 0:1.635, t:1.657. Sp.Gr. 3.54. Occunnnwcr: Found in cracks in a siliceousbreccia carrying somefragments of kasolite. W. F. F. CLASS: SILICATES Kalithomsonite. Sauulr, G. Gonron: Minerals obtained in Greenlandon the SecondAcaderhy -Vaux Expedition, 1923. Proc. Acad. Nat. Sci. Phila., 76, 261 (1924). N,q,un: In allusion to its composition, a thomsonitewith a considerableper- centageof potash(Kaliam). Cnau.rcer,Pnorpnrrns: A hydrous silicate of soda,potash, lime and alumina, (Na,K)zO.CaO. 2AlzOs. ssior. sHrO. Analysis: SiOr38.09, AlzOs26.6l, FezOs tr'' MnO 0.79,CaO 5.72, MgO 0.87,NazO 3.62, KzO 5.65,HrO+ 12.00,HzO- 6.t10; sum 99.75. Cnvsmr,r,ocnepgrcPRopERTrrs: Orthorhombic. Pnvsrcar, nlm Oprrcer, Pnopnnnos: Color, pale vinaceouspink, Biaxial, positive.c:1.535, 0:I.537, z:1.545. X:b,Y:a,Z:e. Cleavage,b perfect, o lessso, c imperfect. Occunncncr: Found as a matted massof small prisms in a pocket in augite- syeniteat Narsarsuk,Greenland,associated with quartz, microcline,fluorite, epidi- dymite,elpidite, calcite, albite and aegyrite. Drscussrou: The high content of potash, equalling the soda molecularly, shouldgive this mineral a speciesrank. If the sodaand potashare not isomorphous theformula becomes KzO. NarO. 2CaO. 4AlrO3. 10SiOr.10HrO. W. F. F. IOURNAL MINERALOGICAL SOCIETY OF AMERICA 133 DOUBTFUL SFECIES CLASS:SULPIIIDES: DIVISION: R',: S:2:1(?) Violarite Wer,oruan LrxocnnN and Mvnox Davv: Nickel Ores from the Key West Mine, Nevada. Econ. GeoI., 19, 3O9 (1924). Na.un: From the Latin oi,olaris:violet, in allusion to its violet-gray color on the polished surface. Csrurcer PnopERrrES: A sulfide of nickel, suggested to be NirS, but no analysis is given. Pnvsrcar- Ptopnnrrns: Color violet gray. Brittle. Alters rapidly in air and tarnishes readily. OccunoNcn: Found with pyrite, chalcopyrite and pentlandite at the Key West Mine, Clark Co., Nevada, as a replacement of the pentlandite. The Sudbury polydymite is shown to be a mixture of pentlandite and violarite in about equal amounts. DtscussroN: The same mineral has been found in S. E. Alaska by Dr. A. F. Buddington (Econ. Geol., 19. 527, 1924). He gives the following additional data: Cleavage in three directions. H:4-4rA. Non-magnetic. This mineral is possibly a member of the pyrite group; the sulfide analogue of chloanthite or of the marcasite group analogous to rammelsbergite. Until accurate analyses of the pure material is given the mineral is doubtful. W. F. Fossec. I t'R.tt CLASS : PHOSPHATES, BTC. DIVISION : R"'F.t "' "' :H,O : 1:2 :6:X. Rauvite FnlNr L. Hrss: New and Known Minerals from the Utah-Colorado Carnotite Region. Bultr. U. S. Geol'.Surrey,75O,63, (1924). Neur: Fromthechemicalsymbolsof radium, Ro, uranitun, U, and vanadium, v. Cnnurcal Pnopnntrns: A hydrous calcium uranium vanadate, CaO. 2UOs. 6VzOo. 20HrO. Analysis: VOa 20.82, VzOr 2.05, VrO6 36.33, CaO 2.00, KzO tr., As:Ortr., FejO:2.39,H2O 13.38, Se tr., MgO 0.12,SOr 0.13,insol. 24.06, sum 101.28. Puvsrcer,AND OprrcAL Pnopnntres: Compactwith slickensidedsurface. Color purplish black. Streak light brown. n:I.88. Apparently metacolloidal. Occunnptcas: Found in cracksin sandstoneassociated with carnotite,hewettite, gypsum,hyalite and meta-torberniteat Temple Mt., San Rafael Swell, Utah. DrscussroN: While this material is apparently new its metacolloidal nature makes it impossibleto determine whether this is a single mineral or not. fts exact nature must be considered doubtful. w. F. F. 134 TIIE AMEKICAN MINERALOGIST CLASS:PHOSPHATES, ETC. DIVISION: R"':R""':H,O:3:2:8. Ferrisymplessite T. L. Werrnn and A. L. Pensoxs: The Arsenatesof Cobalt,Nickel and Iron Observedin the Silver-bearingVeins at Cobalt, Ontario. Contri,butionsto Canad.i,an Mineralogy,p. 16, 1924. Neuu: From its composition,aJerric arsenatewith the ratios of symplessdte. CsBurclr, Pnopnnrrrs: A hydrous arsenate of ferric iron, 3Fe2O3.2As2O6. 16 H,O. Analysis: As,Os38.79, CoO 16.86,NiO 5.73,CaO 7.46,MgO 1.05,FezOs 11.67,AI2OB 0.31, HrO 24.05,insol. 0.88, sum 100.80. (Analysis made on material containing much erythrite and annabergite). Pnvsrcnr.aNo Oprrcar Pnolrnrrrs: Color deepamber brown. Luster resinous. Fibrous. Under the'microscopeslightly pleochroic,strongly birefracting.n:1.650. Sp.Gr. 2.885. OccunnrNcn: Found associatedwith erythrite and annabergitein the upper workings of the Hudson Bay Mine, Colbalt, Ontario. DrscussroN: Suggestedto be the arsenateanalogue of kertschenitebut the min- eral needs further study. w. F. F. CLASS: PHOSPHATES, ETC. DIVISION: R":R""':CO2:HrO:6:2:l:X. Grodsolite M.J.Monozrwrcz: LaGrodnolite,PhosphatecolloidaldeCalcium. (Grodnolite, a colloidal phosphate of calcium). Bwll. Soc. Fr. Min,47, 46 (1924). Naur: From the locality at which it was found, Grodno, Poland. Cneurcel Pnorcnrrns: A carbonato-phosphate of calcium. Analysis: P2O6 32.65, COr 5.10, SiOr 3.13, FerO33.68, Al2Or 1.43,CaO 51.24,Hp 3.23. Pnvsrclr, Pnolnnrrns: Color Brown. fsotropic, n:1.605. Sp. Gr. 2.974. H: less than 4. OccrrnnnNcn: Found as 4odules in a sandy marl near Grodno, Poland. Drscussrom: This mineral differs in no essential respect from collophanite and is undoubtedly that mineral. The alumina and silica may be adsorbed but since microscopic examination showed inclusions of quartz, microcline, etc. they are more likely derived from soluble lilicates. fn the latter case the mineral is a normal collophanite. (See A. F. Rogers: Collophane, a much neglected rr,ineral, Am. J our. Sci., 3, 269, 1922.) w. F. F. CLASS: SILICATES Bardolite M. J. Monozrwcz: Sur la Bardolite, mineral chloritique pyrog6ne. (Bardolite, a pyrogene,chlorititic mineral.)BuIl. Soc.Fr. Mi,n.47, 49 (1924). Nnun: From the locality at which it was found, Barilo, poland. Cnrlrrcnt- Pnolnnrms: A hydrous silicate of iron, alumina, magnesiaand potash. Analysis: SiOz38.45, AIrOB 6.09, FerO317.00, FeO 4.74, CaO 0.59, MgO 9.68,KrO 4.65,Na,O 0.35,HrO 19.50,sum 99.78. Psysrc.n.r,AND OprrcAL Pnopnnrrss: Sp. Gr. 2.73. Birefringencestrong, pleo- chroismfeeble. JOURNAL MINERALOGICAL SOCIETY OF AMERICA I.'J Occunnnwcn: Occurs as radiated plates in a fresb diabase. Believed by Moroze- wicz to be a primary mineral. DrscussroN: This mineral falls within the range of the mineral stilpnomelane, being, however, somewhat higher in potash. It can then be appropriately grouped with stilpnomelane unless more detailed work on this group shows it to be distinct. (See Frank F. Grout and George A. Thiel: Notes on stilpnomelane, Am. Mi,n.g, 228,t924.) w. F. F. CLASS : SILICATES. SUB-CLASS : HYDROUS SIICATES. DIVISION: R":Si : H,O:2:1;1. Radio-active Chrysocolla E. Puxroou and E. Maxce. Radioactive Chrysocolla from the Benade Padru Mine. Ann. Chim. Appli,cata, A, 123 (1924). Nllra. Suggested to be new but no name given to it. Cnnurcer Pnoponnns: A hydrous silicate of copper, Cu2SiOn*HrO. Analysis: SiO, 20, CUO 72.1, HzO (loss at 100') 4.5, (loss at 200") 6.9, PbO 0.6, Fe2O3 0.3, cor 1.1, s 2.0.
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  • Identification and Occurrence of Uranium and Vanadium Minerals from the Colorado Plateaus

    Identification and Occurrence of Uranium and Vanadium Minerals from the Colorado Plateaus

    Identification and Occurrence of Uranium and Vanadium Minerals From the Colorado Plateaus GEOLOGICAL SURVEY BULLETIN 1009-B IDENTIFICATION AND OCCURRENCE OF URANIUM AND VANADIUM MINERALS FROM THE COLORADO PLATEAUS By A. D. WEEKS and M. E. THOMPSON ABSTRACT This report, designed to make available to field geologists and others informa­ tion obtained in recent investigations by the Geological Survey on identification and occurrence of uranium minerals of the Colorado Plateaus, contains descrip­ tions of the physical properties, X-ray data, and in some instances results of chem­ ical and spectrographic analysis of 48 uranium and vanadium minerals. Also included is a list of locations of mines from which the minerals have been identified. INTRODUCTION AND ACKNOWLEDGMENTS The 48 uranium and vanadium minerals described in this report are those studied by the writers and their colleagues during recent mineralogic investigation of uranium ores from the Colorado Plateaus. This work is part of a program undertaken by the Geological Survey on behalf of the Division of Raw Materials of the U. S. Atomic Energy Commission. Thanks are due many members of the Geological Survey who have worked on one or more phases of the study, including chemical, spec­ trographic, and X-ray examination,' as well as collecting of samples. The names of these Survey members are given in the text where the contribution of each is noted. The writers are grateful to George Switzer of the U. S. National Museum and to Clifford Frondel of Harvard University who kindly lent type mineral specimens and dis­ cussed various problems. PURPOSE The purpose of this report is to make available to field geologists and others who do not have extensive laboratory facilities, information obtained in recent investigations by the Geological Survey on the identification and occurrence of the uranium and vanadium minerals of ores from the plateaus.

  • Rx-Sktodowskrte

    STUDIESOF RADIOACTIVECOMPOUNDS: rx-sKtoDowsKrTE D. H. CORMAN Unfuersity of Toronto, Toronto, Canad,a AsstRAcr New r-ray data are presented for the uranium silicate, sklodowskite. The mineral is monoclinic, C2/m; a-: L7.2.84,D : 7.03, c - 6.56; F - 106o63'. Isomorphism vith uranophane is discussed,Conditions for the forrnation of this rare mineral are reviewed, Of the several speciesof uranium silicate minerals, sklodowskite has the most limited geographicaldistribution, the only recorded occurrence being that at Shinkolobwe, Katanga, Belgian Congo. It was first des- cribed by Schoep (1924a).The analogy with uranophanewas recognized by Schoep (Ig24b) who subsequently (L927) described its. isomorphism with this mineral. Billiet (1936) obtained an rc-raypowder pattern, and establishedcell dimensionsand a symmetry based upon rotation photo- graphs. As was the casewith his work on uranophane,erroneous results were obtained owing to the non-amenability of the crystals to the r-ray technique employed. In 1923 Schoep published two brief notes describing a new mineral speciesfrom the Shinkolobwe deposits, which he called chinkolobwite. However, in 1926 he wrote on tie identity of chinkolobwite and the specieswhich he had previously named sklodowskite. It was pointed out to Schoep by Buttgenbach that the narne sklodor+'skitewa6 the more appropriate for the speciesowing to the fact that the mineral does not actually occur at the village of Shinkolobwe, but at Kasolo Hill, and that the honor paid to Maria Sklodowska (later Madame Curie) should be perpetuated. Physical, Prpperties Sklodowskite occurs as minute acicular crystals in tightly compacted parallel aggregates, often reticulate, radiating divergent or stellate. Exceedingly small crystals form velvety coatings on host rock.
  • ~Ew Mineral Names*

    ~Ew Mineral Names*

    American Mineralogist, Volume 68, pages 1248-1252, 1983 ~EW MINERAL NAMES* PETE J. DUNN, MICHAEL FLEISCHER, GEORGE Y. CHAO, LOUIS J. CABRI, AND JOSEPH A. MANDARINO Bijvoetite* Lepersonnite* bright yellow and is transparent and translucent. No fluores- Unnamed Co-Ni-Mg uranyl silicate cence was observed under short- or long-wave VV. The mea- sured density is 3.97 g/cm3. It is optically biaxial negative, 2V M. Deliens and P. Piret (1982) Bijvoetite et lepersonnite, carbon- = 1.638, (3 1.666, 1.682; pleochroic with X pale ates hydrates d'uranyle et des terres rares de Shinkolobwe, 73° calc., a = = 'Y= yellow, Y bright yellow and Z bright yellow; orientation, only Zaire. Can. Mineral., 20, 231-238. Y = c is given. The mineral is orthorhombic, Pnnm or Pnn2 with a 16.23(3), Bijvoetite = b = 38.74(9), c = 11.73(3)A, Z = 2, (V = 7375(50)A3, J .A.M.). Bijvoetite and lepersonnite occur with hydrated uranium ox- The density calculated from the unit cell parameters and the ides near primary uraninite in the lower part of the oxidation empirical formula is 4.01 g/cm3. Strongest lines in the X-ray zone at Shinkolobwe, Zaire. Bijvoetite is rare and is known only powder diffraction pattern (for CuKa) are: 8.15(100)(200), from a single specimen. Associated minerals are: lepersonnite, 4.06(15)(400), 3.65(70)(133), 3.21(50)(0.12.0) and 2.86(40)(283). sklodowskite, curite, uranophane, becquerelite, rutherfordine, An electron microprobe analysis gave: Si02 2.79, V03 76.14, studtite and a Co-Mg-Ni uranyl silicate structurally related to Gd203 2.09, DY203 1.07, Y203 0.41, Tb203 0.09, CaO 0.45, C02 uranophane.
  • Vandenbrandeite Cu(UO2)(OH)4 C 2001-2005 Mineral Data Publishing, Version 1

    Vandenbrandeite Cu(UO2)(OH)4 C 2001-2005 Mineral Data Publishing, Version 1

    Vandenbrandeite Cu(UO2)(OH)4 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Triclinic. Point Group: 1. Crystals, flattened on {001}, may be lathlike, rounded, to 0.5 cm; in parallel aggregates, lamellar, scaly; massive. Physical Properties: Cleavage: {110}, perfect; two others, in the [001] zone, indistinct. Hardness = 4 D(meas.) = 4.91–5.03 D(calc.) = [5.14] Radioactive. Optical Properties: Translucent, transparent in thin fragments. Color: Dark green to nearly black; green in transmitted light. Streak: Green. Luster: Vitreous. Optical Class: Biaxial, (+) or (–). Pleochroism: Yellow-green to blue-green. Orientation: Z ∧ elongation ' 40◦. Dispersion: Strong. α = 1.76–1.77 β = 1.78–1.79 γ = 1.78–1.82 2V(meas.) = ∼90◦ Cell Data: Space Group: P 1 (probable). a = 7.855(5) b = 5.449(4) c = 6.089(4) α =91.44(5)◦ β = 101.90(5)◦ γ =89.2(5)◦ Z=2 X-ray Powder Pattern: Kalongwe, Congo. 4.29 (10), 2.92 (8), 5.06 (4), 2.56 (4), 2.09 (3), 1.85 (3), 1.47 (3) Chemistry: (1) (2) UO3 71.23 71.22 CuO 19.20 19.81 H2O 9.57 8.97 Total [100.00] 100.00 (1) Shinkolobwe, Congo; recalculated to 100% after deduction of SiO2 0.28%, MgO 0.57%, CaO 0.26% as impurities. (2) Cu(UO2)(OH)4. Occurrence: A rare secondary mineral in the oxide zone of hydrothermal copper-bearing uranium deposits. Association: Cuprosklodowskite, kasolite, sklodowskite, malachite, chalcocite, chalcopyrite, uraninite, goethite (Kalongwe, Congo); curite, uranophane, sharpite (Shinkolobwe, Congo). Distribution: In Congo (Zaire), in Katanga (Shaba) Province, from the Luiswishi mine; at Kalongwe; from Shinkolobwe; at Kambove; from Swambo; and in the Musonoi mine, near Kolwezi.