Plumbomicrolite Mineral Data (original) (raw)

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General Plumbomicrolite Information
Help on Chemical  Formula: Chemical Formula: (Pb,Ca,U)2Ta2O6(OH)
Help on Composition: Composition: Molecular Weight = 795.19 gm
Calcium 3.02 % Ca 4.23 % CaO
Uranium 5.99 % U 6.79 % UO2
Tantalum 45.51 % Ta 55.57 % Ta2O5
Hydrogen 0.13 % H 1.13 % H2O
Lead 31.27 % Pb 33.68 % PbO
Oxygen 14.08 % O
______ ______
100.00 % 101.41 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb1.2Ca0.6U0.2Ta2O6(OH)
Help on Environment: Environment: In alluvium near lithium-rich pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Mumba district, Kobokobo, Kivu province, Congo (Zaire). Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for lead, "PLUMBum" and its relationship to microlite.
Help on Name Pronunciation: Name Pronunciation: Plumbomicrolite + Pronunciation Say PLUMBOMICROLITE
Help on Synonym: Synonym: ICSD 45821
PDF 44-670
Plumbomicrolite Image
Click Here for Larger Plumbomicrolite Image in a New Browser Window Images: Click Here for Larger Plumbomicrolite Image Plumbomicrolite Comments: Gray, octahedral crystal of plumbomicrolite. Location: Ploskaya Mt, Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia.Scale: 20x17x13 mm. © John Betts - Fine Minerals
Click Here for Larger Plumbomicrolite Image in a New Browser Window Images: Click Here for Larger Plumbomicrolite Image Plumbomicrolite Comments: Large octahedral crystal of brownish black plumbomicrolite on matrix. Location: Berg Ploskaya, West Keivy Massif, Kola Peninsula, Russia.Scale: See Image. © Paul M. Schumacher
Plumbomicrolite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 10.56, Z = 6; V = 1,177.58 Den(Calc)= 6.73
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): 1.867(1), 1.593(0.99), 2.642(0.65),
Click Here for Large Plumbomicrolite Structure Window Crystal Structure: Mouse drag1 - LMB Manipulate Structuredrag2 - RMB Resize/Rotate Keyboard S - Stereo Pair on/offH - Help ScreenI - Data InfoA - Atoms On/OffP - Polyhedra On/OffB - Bonds On/Off Help on Above Groult D , Michel C , Raveau B , Journal of Inorganic and Nuclear Chemistry , 37 (1975) p.2203-2205, Sur de nouveaux pyrochlores lacunaires d�ions bivalents synthetises par, echanges d�ions, Locality: synthetic
Physical Properties of Plumbomicrolite
Help on Color: Color: Greenish yellow, Yellow, Orange.
Help on Density: Density: 6.6
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white
Optical Properties of Plumbomicrolite
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)KPDcalc= 0.1464,KPDmeas= 0.1492,KC= 0.1482Ncalc = 1.98 - 2
Help on Optical Data: Optical Data: Isotropic, n=1.95-2.02.
Calculated Properties of Plumbomicrolite
Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.51 gm/ccnote: Specific Gravity of Plumbomicrolite =6.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEPlumbomicrolite =1,299.96 barns/electronU=PEPlumbomicrolite x relectron=7,159.91 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 425,849.03 (Gamma Ray American Petroleum Institute Units)Concentration of Plumbomicrolite per GRapi unit = 2.35 (PPM) Plumbomicrolite 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) 71.43 ± 17.86 grams of pure Plumbomicrolite .Estimated Maximum U.S. Postal Shipping Size(10 mRem/hr limit, Unshielded 100 cm box) 7142.6 ±1785.6 grams of pure Plumbomicrolite . Estimated Radioactivity from Plumbomicrolite - strong SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor One Hour 1000 gm / 6.61 cm 10,716,196 2.90E-04 425,849.03 140.01 100 gm / 3.07 cm 1,071,620 2.90E-05 42,584.90 14.00 10 gm / 1.43 cm 107,162 2.90E-06 4,258.49 1.40 1 gm / 6.61 mm 10,716 2.90E-07 425.85 0.14 0.1 gm / 3.07 mm 1,072 2.90E-08 42.58 0.01 0.01 gm / 1.43 mm 107 2.90E-09 4.26 0.00 0.001 gm / 0.66 mm 11 2.90E-10 0.43 0.00 Weight of pure Plumbomicrolite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.60 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
Plumbomicrolite Classification
Help on  Dana Class: Dana Class: 08.02.02.03 (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 Plumbomicrolite Information
Help on References: References: NAME( AntBidBlaNic3) 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 Plumbomicrolite :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 Plumbomicrolite using: Google Web webmineral.com [AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]Visit our Advertisers for Plumbomicrolite : A Bijoux Google Search for Plumbomicrolite Adam's Minerals Google Search for Plumbomicrolite Cape Minerals Google Search for Plumbomicrolite Dakota Matrix Minerals Google Search for Plumbomicrolite Excalibur Mineral Corp. Google Search for Plumbomicrolite Exceptional Minerals Google Search for Plumbomicrolite John Betts Fine Minerals Search for Plumbomicrolite McDougall Minerals Google Search for Plumbomicrolite Mineral News Website Link Rock and Mineral Shows Google Search for Plumbomicrolite Weinrich Minerals, Inc. Google Search for Plumbomicrolite Ask about Plumbomicrolite 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 Plumbomicrolite Specimen Label here : Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) Dana No: 08.02.02.03 Strunz No: 04.DH.15 Locality: Notes: