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Plumbopyrochlore Mineral Data

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General Plumbopyrochlore Information

Help on Chemical  Formula: Chemical Formula: (Pb,Y,U,Ca)2-xNb2O6(OH)
Help on Composition: Composition: Molecular Weight = 484.00 gm
   Calcium    0.83 %  Ca    1.16 % CaO
   Yttrium    3.67 %  Y     4.67 % Y2O3
   Uranium    4.92 %  U     5.91 % UO3
   Tantalum   3.74 %  Ta    4.56 % Ta2O5
   Niobium   26.87 %  Nb   38.44 % Nb2O5
   Iron       2.31 %  Fe    2.97 % FeO
   Silicon    1.16 %  Si    2.48 % SiO2
   Hydrogen   0.10 %  H     0.93 % H2O
   Lead      34.25 %  Pb   36.89 % PbO
   Oxygen    22.15 %  O
            ______        ______ 
            100.00 %       98.02 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb0.8Y0.2U0.1Ca0.1Nb1.4Si0.2Fe2+0.2Ta0.1O6.2(OH)0.5
Help on Environment: Environment: Metasomatically altered granitic rocks.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Undisclosed locality in the Northern Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For lead, PLUMBum, in its composition and its relationship to pyrochlore.
Help on Name Pronunciation: Name Pronunciation: Plumbopyrochlore + Pronunciation Say PLUMBOPYROCHLORE
Help on Synonym: Synonym: ICSD 45816
  PDF 25-453
 

Plumbopyrochlore Image

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  Plumbopyrochlore   Columbite-(Fe)

Comments: Brown plumbopyrochlore crystal with dark brown ferrocolumbite (columbite-(Fe)).
Location: Holdazan, Buregteg, Mongolia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Fergusonite-(Y)   Plumbopyrochlore

Comments: Brown resinous fergusonite-(Y) (as per communication with Pavel M. Kartashov) with yellowish plumbopyrochlore.
Location: Ploskaya Mountain, Keivy Region, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Plumbopyrochlore   Columbite-(Mn)

Comments: Yellow-brown plumbopyrochlore crystalline crust over black manganocolumbite grain. Such plumbopyrochlore-manganocolumbite ovoids with different grade of replacement are very typical for the locality.
Location: Amazonite pegmatites of Ploskaya Mt, Western Keivy Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 12x10 mm.
© Pavel M. Kartashov

Plumbopyrochlore Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.534, Z = 8; V = 1,168.91 Den(Calc)= 5.50
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.02(1), 1.581(0.9), 1.861(0.9),
 

Physical Properties of Plumbopyrochlore

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Greenish yellow, Dark brown, Red.
Help on Density: Density: 5.04
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Octahedral Crystals - Occurs as octahedral shaped crystals.
Help on Hardness: Hardness: 4.5-5.5 - Near Apatite
Help on Luster: Luster: Vitreous - Resinous
 

Optical Properties of Plumbopyrochlore

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.126 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1964,KPDmeas= 0.2143,KC= 0.1902
Ncalc = 1.96 - 2.05
Help on Optical Data: Optical Data: Isotropic, n=2.08.
 

Calculated Properties of Plumbopyrochlore

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.80 gm/cc
note: Specific Gravity of Plumbopyrochlore =5.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PEPlumbopyrochlore = 823.00 barns/electron
U=PEPlumbopyrochlore x relectron=3,954.14 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 366,187.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Plumbopyrochlore per GRapi unit = 2.73 (PPM)

Plumbopyrochlore 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) 83.06 ± 20.77 grams of pure Plumbopyrochlore .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 8306.3 ±2076.6 grams of pure Plumbopyrochlore .

Estimated Radioactivity from Plumbopyrochlore - strong
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.03 cm 8,803,098 2.38E-04 366,187.94 120.39
100 gm / 3.26 cm 880,310 2.38E-05 36,618.79 12.04
10 gm / 1.51 cm 88,031 2.38E-06 3,661.88 1.20
1 gm / 7.03 mm 8,803 2.38E-07 366.19 0.12
0.1 gm / 3.26 mm 880 2.38E-08 36.62 0.01
0.01 gm / 1.51 mm 88 2.38E-09 3.66 0.00
0.001 gm / 0.70 mm 9 2.38E-10 0.37 0.00

Weight of pure Plumbopyrochlore in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.50 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
 

Plumbopyrochlore Classification

Help on  Dana Class: Dana Class: 08.02.01.06 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.02)where (A)2 (B2O6) (O,OH,F)
  (08.02.01)Pyrochlore Group (Pyrochlore Subgroup; Nb>Ta;(Nb+Ta)>2(Ti)
 
08.02.01.01 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m
 
08.02.01.02 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m
 
08.02.01.03 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m
 
08.02.01.04 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3
 
08.02.01.05 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 
08.02.01.06 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m
 
08.02.01.07 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 
08.02.01.08 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m
 
08.02.01.09 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)•n(H2O) 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 Plumbopyrochlore 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 Plumbopyrochlore :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

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Print or Cut-and-Paste your Plumbopyrochlore Specimen Label here :

Plumbopyrochlore

(Pb,Y,U,Ca)2-xNb2O6(OH)
Dana No: 08.02.01.06 Strunz No: 04.DH.15
Locality:

 

Notes:

 

 
   
 


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