Plumbobetafite Mineral Data

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General Plumbobetafite Information

Chemical Formula:

(Pb,U,Ca)(Ti,Nb)2O6(OH,F)

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

Empirical Formula:

Pb_0.5U_0.2Ca_0.2Na_0.1REE_0.1Ti_1.3Nb_0.4W_0.2O₆(OH)_0.6F_0.4

Environment:

Accessory mineral in a pegmatitic dike in nepheline syenite.

IMA Status:

Approved IMA 1969

Locality:

Burpala massif, 120 km north of Lake Baikal, eastern Siberia. Link to MinDat.org Location Data.

Name Origin:

Named for the lead (PLUMBium), and other betafite minerals.

Name Pronunciation:

Plumbobetafite + Pronunciation

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Plumbobetafite Crystallography

Cell Dimensions:

a = 10.33, Z = 8; V = 1,102.30 Den(Calc)= 5.13

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m

Physical Properties of Plumbobetafite

Cleavage:

None

Color:

Brown, Yellow.

Density:

4.64

Diaphaneity:

Translucent to Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Cubic Crystals - Occurs as cubic shaped crystals.

Habit:

Metamict - Mineral originally crystalline, now amorphous due to radiation damage.

Hardness:

4.5-5.5 - Near Apatite

Luminescence:

Radioactive.

Luster:

Adamantine

Optical Properties of Plumbobetafite

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

Electron Density:

Bulk Density (Electron Density)=4.51 gm/cc
note: Specific Gravity of Plumbobetafite =5.13 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_{Plumbobetafite}= 857.07 barns/electron
U=PE_{Plumbobetafite} x r_electron=3,869.25 barns/cc.

Radioactivity:

GRapi = 841,647.79 (Gamma Ray American Petroleum Institute Units)
Concentration of Plumbobetafite per GRapi unit =1,188.15 (PPB)

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	20,084,210	5.43E-04	841,647.79	276.71
100 gm / 3.34 cm	2,008,421	5.43E-05	84,164.78	27.67
10 gm / 1.55 cm	200,842	5.43E-06	8,416.48	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

Dana Class:

08.02.03.03 (08)Multiple Oxides with Nb, Ta, and Ti

(08.02)where (A)2 (B2O6) (O,OH,F)

(08.02.03)Pyrochlore Group (Betafite Subgroup; 2(Ti)>(Ta+Nb)

08.02.03.01 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

08.02.03.02 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

08.02.03.03 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m

08.02.03.04 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m

08.02.03.05 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 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 Plumbobetafite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Plumbobetafite :
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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Plumbobetafite

(Pb,U,Ca)(Ti,Nb)2O6(OH,F)
Dana No: 08.02.03.03 Strunz No: 04.DH.15
Locality:

Notes: