Uranmicrolite Mineral Data (original) (raw)

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General Uranmicrolite Information
Help on Chemical Formula: Chemical Formula: (U,Ca)2(Ta,Nb)2O6(OH)
Help on Composition: Composition: Molecular Weight = 695.81 gm
Calcium 6.91 % Ca 9.67 % CaO
Uranium 27.37 % U 31.05 % UO2
Tantalum 46.81 % Ta 57.16 % Ta2O5
Niobium 2.67 % Nb 3.82 % Nb2O5
Hydrogen 0.14 % H 1.29 % H2O
Oxygen 16.10 % O
______ ______
100.00 % 102.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: U0.8Ca1.2Ta1.8Nb0.2O6(OH)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1957
Help on Locality: Locality: Fazenda Posse, Brejauba district, Municiop de Conceicao de Serro, Minas Gerias, Brazil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for uranium and as a member of the microlite group.
Help on Name Pronunciation: Name Pronunciation: Uranmicrolite + Pronunciation Say URANMICROLITE
Help on Synonym: Synonym: Djalmaite
ICSD 27778
PDF 43-693
Uranmicrolite Image
Click Here for Larger Uranmicrolite Image in a New Browser Window Images: Click Here for Larger Uranmicrolite Image Uranmicrolite Comments: lack crystals of (most probably) uranmicrolite [originallly labeled samarskite-(Y)) in purple lepidolite matrix. **Location:** Brown Derby Mine, Ohio City, Quartz Creek District, Gunnison Co., Colorado, USA.**Scale:** Specimen Side 3x3x2 cm. **©** John Betts - Fine Minerals
Uranmicrolite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 10.4, Z = 6; V = 1,124.86 Den(Calc)= 6.16
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.552(1), 1.818(1), 2.95(1),0.995(0.8), 1.054(0.8), 1.154(0.8), 1.183(0.8), 2.55(0.8),
Physical Properties of Uranmicrolite
Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish brown, Yellow brown, Black.
Help on Density: Density: 5.75 - 5.88, Average = 5.81
Help on Diaphaneity: Diaphaneity: Transparent to Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Octahedral Crystals - Occurs as octahedral shaped crystals.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Highly Radioactive.
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: yellow
Optical Properties of Uranmicrolite
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.095 (Poor) - where the CI = (1-KPDmeas/KC)CI calc= -0.034 (Excellent) - where the CI = (1-KPDcalc/KC)KPDcalc= 0.1575,KPDmeas= 0.1668,KC= 0.1523Ncalc = 1.88 - 1.94
Help on Optical Data: Optical Data: Isotropic, n=1.97.
Calculated Properties of Uranmicrolite
Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.21 gm/ccnote: Specific Gravity of Uranmicrolite =6.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0021973976Boson Index = 0.9978026024
Help on Photoelectric: Photoelectric: PEUranmicrolite =1,309.70 barns/electronU=PEUranmicrolite x relectron=6,822.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 1,972,637.55 (Gamma Ray American Petroleum Institute Units)Concentration of Uranmicrolite per GRapi unit = 506.94 (PPB) Uranmicrolite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. Estimated Maximum U.S. Postal Shipping Size(10 mRem/hr limit, Unshielded 10 cm box) 15.42 ± 3.85 grams of pure Uranmicrolite .Estimated Maximum U.S. Postal Shipping Size(10 mRem/hr limit, Unshielded 100 cm box) 1541.9 ±385.48 grams of pure Uranmicrolite . Estimated Radioactivity from Uranmicrolite - very strong SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor One Hour 1000 gm / 6.77 cm 48,987,279 1.32E-03 1,972,637.55 648.54 100 gm / 3.14 cm 4,898,728 1.32E-04 197,263.76 64.85 10 gm / 1.46 cm 489,873 1.32E-05 19,726.38 6.49 1 gm / 6.77 mm 48,987 1.32E-06 1,972.64 0.65 0.1 gm / 3.14 mm 4,899 1.32E-07 197.26 0.06 0.01 gm / 1.46 mm 490 1.32E-08 19.73 0.01 0.001 gm / 0.68 mm 49 1.32E-09 1.97 0.00 Weight of pure Uranmicrolite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.16 gm/cc.* Goverment Estimate of Average Annual Exposure (360 mRem)** Note: 10 microsieverts/hr = 1 mRem/hr ** Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes) Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Uranmicrolite Classification
Help on Dana Class: Dana Class: 08.02.02.04 (08)Multiple Oxides with Nb, Ta, and Ti
(08.02)where (A)2 (B2O6) (O,OH,F)
(08.02.02)Pyrochlore Group (Microlite Subgroup; Ta>Nb;(Ta+Nb)>2(Ti)
08.02.02.01 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m
08.02.02.02 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m
08.02.02.03 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m
08.02.02.04 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m
08.02.02.05 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m
08.02.02.06 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m
08.02.02.07 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m
08.02.02.08 Fluornatromicrolite! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: 04.DH.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
04.D - Metal:Oxygen = 1:2 and similar
04.DH -With large (� medium-sized) cations; sheets of edge-sharing octahedra
04.DH.15 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic
04.DH.15 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m
04.DH.15 Cesstibtantite (Cs,Na)SbTa4O12 F d3m 4/m 3 2/m
04.DH.15 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
04.DH.15 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Jixianite Pb(W,Fe)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m
04.DH.15 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m
04.DH.15 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m
04.DH.15 Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 F d3m 4/m 3 2/m
04.DH.15 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
04.DH.15 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
04.DH.15 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
04.DH.15 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)•n(H2O) F d3m 4/m 3 2/m
04.DH.15 Fluornatromicrolite! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m
04.DH.15 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
04.DH.15 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3
04.DH.15 Elsmoreite! WO3•0.5(H2O) F d3m 4/m 3 2/m
Other Uranmicrolite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Uranmicrolite :1 - Am. Min. Crystal Structure Database2 - Athena3 - EUROmin Project4 - Ecole des Mines de Paris5 - GeoScienceWorld6 - Google Images7 - Google Scholar8 - Handbook of Mineralogy (MinSocAm)9 - Handbook of Mineralogy (UofA)10 - MinDAT11 - Mineralienatlas (Deutsch)12 - Online Mineral Museum13 - QUT Mineral Atlas14 - Ruff.Info15 - Uranium Minerals Search for Uranmicrolite using: Google Web webmineral.com [AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]Visit our Advertisers for Uranmicrolite : A Bijoux Google Search for Uranmicrolite Adam's Minerals Google Search for Uranmicrolite Cape Minerals Google Search for Uranmicrolite Dakota Matrix Minerals Google Search for Uranmicrolite Excalibur Mineral Corp. Google Search for Uranmicrolite Exceptional Minerals Google Search for Uranmicrolite John Betts Fine Minerals Search for Uranmicrolite McDougall Minerals Google Search for Uranmicrolite Mineral News Website Link Rock and Mineral Shows Google Search for Uranmicrolite Weinrich Minerals, Inc. Google Search for Uranmicrolite Ask about Uranmicrolite here : Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol Print or Cut-and-Paste your Uranmicrolite Specimen Label here : Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) Dana No: 08.02.02.04 Strunz No: 04.DH.15 Locality: Notes: