Plumbobetafite Mineral Data + Say PLUMBOBETAFITE


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General Plumbobetafite Information
Help on Chemical Formula: Chemical Formula: (Pb,U,Ca)(Ti,Nb)2O6(OH,F)
Help on Composition: Composition: Molecular Weight = 425.90 gm
   Sodium            0.54 %  Na    0.73 % Na2O
   Calcium           1.88 %  Ca    2.63 % CaO
   La,Ce,Pr,Nd,Sm,   3.38 %  RE    3.94 % REE2O3
   Uranium          11.18 %  U    13.43 % UO3
   Titanium         14.61 %  Ti   24.38 % TiO2
   Niobium           8.73 %  Nb   12.48 % Nb2O5
   Hydrogen          0.14 %  H     1.27 % H2O
   Lead             24.33 %  Pb   26.20 % PbO
   Tungsten          8.63 %  W    10.89 % WO3
   Oxygen           24.79 %  O
   Fluorine          1.78 %  F     1.78 % F
                      -   %   F    -0.75 % -O=F2
                   ______        ______ 
                   100.00 %       96.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb0.5U0.2Ca0.2Na0.1REE0.1Ti1.3Nb0.4W0.2O6(OH)0.6F0.4
Help on Environment: Environment: Accessory mineral in a pegmatitic dike in nepheline syenite.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Burpala massif, 120 km north of Lake Baikal, eastern Siberia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the lead (PLUMBium), and other betafite minerals.
 

Plumbobetafite Image

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Plumbobetafite   Plumbopyrochlore

Comments: Brown resinous plumbobetafite with yellowish plumbopyrochlore.
Location: Ploskaya Mountain, Keivy Region, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Plumbobetafite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 10.33, Z = 8; V = 1,102.30 Den(Calc)= 5.13
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m
 

Physical Properties of Plumbobetafite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Yellow.
Help on Density: Density: 4.64
Help on Diaphaniety: Diaphaniety: Translucent to Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Cubic Crystals - Occurs as cubic shaped crystals.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Hardness: Hardness: 4.5-5.5 - Near Apatite
Help on Luminescence: Luminescence: Radioactive.
Help on Luster: Luster: Adamantine
 

Optical Properties of Plumbobetafite

Help on Optical Data: Optical Data: NCalc= 2.11 - from Gladstone-Dale relationship (KC = 0.2158) where Ncalc=Dcalc*KC+1
NCalc= 2 - from Gladstone-Dale relationship (KC = 0.2158) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Plumbobetafite

Help on Electron Density: Electron Density:

relectron=4.51 gm/cc
note: rPlumbobetafite =5.13 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.09222
Boson Index = 0.90778
Help on Photoelectric: Photoelectric:

PEPlumbobetafite = 857.07 barns/electron
U=PEPlumbobetafite x relectron=3,869.25 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 841,646.74 (Gamma Ray American Petroleum Institute Units)

Plumbobetafite 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) 36.14 ± 9.03 grams of pure Plumbobetafite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 3613.9 ±903.49 grams of pure Plumbobetafite .

Estimated Radioactivity from Plumbobetafite - 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 / 7.19 cm 20,084,199 5.43E-04 841,646.74 276.71
100 gm / 3.34 cm 2,008,420 5.43E-05 84,164.67 27.67
10 gm / 1.55 cm 200,842 5.43E-06 8,416.47 2.77
1 gm / 7.19 mm 20,084 5.43E-07 841.65 0.28
0.1 gm / 3.34 mm 2,008 5.43E-08 84.16 0.03
0.01 gm / 1.55 mm 201 5.43E-09 8.42 0.00
0.001 gm / 0.72 mm 20 5.43E-10 0.84 0.00

Weight of pure Plumbobetafite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.13 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
Estimated Thorium Activity ( 0.17 % Th) From Sum REE Elements ( 3.38 % REE)
 

Plumbobetafite Classification
Help on Dana Class: Dana Class: 8.2.3.3 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.2)where (A)2 (B2O6) (O,OH,F)
  (8.2.3)Pyrochlore Group (Betafite Subgroup; 2(Ti)>(Ta+Nb)
 
8.2.3.1 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
8.2.3.2 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
8.2.3.3 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.3.4 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
 
8.2.3.5 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: IV/C.16-40 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.16 - Pyrochlore group, Betafite series with Ti > (Nb,Ta)
 
IV/C.16-10 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
IV/C.16-20 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.16-30 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
IV/C.16-40 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
 

Other Plumbobetafite Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Plumbobetafite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

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

Plumbobetafite

(Pb,U,Ca)(Ti,Nb)2O6(OH,F)
Dana No: 8.2.3.3 Strunz No: IV/C.16-40
Locality:

 

Notes:

 
 
   
 
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