Plumbomicrolite Mineral Data (original) (raw)
| | | | Search Webmineral : | | | ----------------------------------------------------------------------------------------------------------------------- | | ------------------- | |
| Home | Crystal | jmol | jPOWD | Chem | X Ray | Dana | Strunz | Properties | A to Z | Images | Share | | | News | Help | About | | ----------- | ---------------------------- | --------------------------- | --------------------------- | ------------------------- | -------------------------- | -------------------------- | ------------------------- | ------------------------------- | ----------------------------------------- | -------------------------------- | ----- | | | ------------------------- | --------------------------- | -------------------------- |
General Plumbomicrolite Information | |
---|---|
Chemical Formula: | (Pb,Ca,U)2Ta2O6(OH) |
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 | |
Empirical Formula: | Pb1.2Ca0.6U0.2Ta2O6(OH) |
Environment: | In alluvium near lithium-rich pegmatites. |
IMA Status: | Approved IMA 1977 |
Locality: | Mumba district, Kobokobo, Kivu province, Congo (Zaire). Link to MinDat.org Location Data. |
Name Origin: | Named for lead, "PLUMBum" and its relationship to microlite. |
Name Pronunciation: | Plumbomicrolite + Pronunciation |
Synonym: | ICSD 45821 |
PDF 44-670 | |
Plumbomicrolite Image | |
Images: | 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 |
Images: | 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 | |
Cell Dimensions: | a = 10.56, Z = 6; V = 1,177.58 Den(Calc)= 6.73 |
Crystal System: | Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m |
X Ray Diffraction: | By Intensity(I/Io): 1.867(1), 1.593(0.99), 2.642(0.65), |
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 | |
Color: | Greenish yellow, Yellow, Orange. |
Density: | 6.6 |
Diaphaneity: | Translucent |
Habit: | Euhedral Crystals - Occurs as well-formed crystals showing good external form. |
Habit: | Massive - Granular - Common texture observed in granite and other igneous rock. |
Habit: | Metamict - Mineral originally crystalline, now amorphous due to radiation damage. |
Hardness: | 5 - Apatite |
Luster: | Greasy (Oily) |
Streak: | white |
Optical Properties of Plumbomicrolite | |
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 |
Optical Data: | Isotropic, n=1.95-2.02. |
Calculated Properties of Plumbomicrolite | |
Electron Density: | Bulk Density (Electron Density)=5.51 gm/ccnote: Specific Gravity of Plumbomicrolite =6.60 gm/cc. |
Fermion Index: | Fermion Index = 0.06Boson Index = 0.94 |
Photoelectric: | PEPlumbomicrolite =1,299.96 barns/electronU=PEPlumbomicrolite x relectron=7,159.91 barns/cc. |
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 | |
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 | |
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 | |
References: | NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
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: 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: |