Mineralogy Database

Uranpyrochlore Mineral Data

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General Uranpyrochlore Information

Help on Chemical  Formula: Chemical Formula: (U,Ca,Ce)2(Nb,Ta)2O6(OH,F)
Help on Composition: Composition: Molecular Weight = 541.23 gm
   Calcium    5.18 %  Ca    7.25 % CaO
   Cerium    20.71 %  Ce   24.26 % Ce2O3
   Uranium   17.59 %  U    19.96 % UO2
   Tantalum  16.72 %  Ta   20.41 % Ta2O5
   Niobium   18.88 %  Nb   27.01 % Nb2O5
   Hydrogen   0.17 %  H     1.50 % H2O
   Oxygen    20.40 %  O
   Fluorine   0.35 %  F     0.35 % F
               -   %   F    -0.15 % -O=F2    
            ______        ______ 
            100.00 %      100.59 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: U0.4Ca0.7Ce0.8Nb1.1Ta0.5O6(OH)0.9F0.1
Help on Environment: Environment: Cemented calcareous tuffs associated with carbonatite.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: Kasenda, Fort Portal area, Uganda. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its URANium content and membership in the pyrochlore group.
Help on Name Pronunciation: Name Pronunciation: Uranpyrochlore + Pronunciation Say URANPYROCHLORE
Help on Synonym: Synonym: Hatchettolite
 

Uranpyrochlore Image

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  Uranpyrochlore   Samarskite-(Y)

Comments: Deep greenish-brown resinous crystalline massive uranpyrochlore with black samarskite-(Y).
Location: Beryl Hill, near Yinnietharra Station, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Uranpyrochlore Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.44, Z = 8; V = 1,137.89 Den(Calc)= 6.32
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): 3.01(1), 1.84(0.8), 1.575(0.6),7.3(0.4), 2.61(0.3), 1.202(0.2), 1.168(0.2),
 

Physical Properties of Uranpyrochlore

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow brown, Red, Reddish brown, Black.
Help on Density: Density: 4.8
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Octahedral Crystals - Occurs as octahedral shaped crystals.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Resinous
Help on Streak: Streak: brownish yellow
 

Optical Properties of Uranpyrochlore

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.143 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.132 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1551,KPDmeas= 0.2042,KC= 0.1786
Ncalc = 1.86 - 2.13
Help on Optical Data: Optical Data: Isotropic, n=1.98.
 

Calculated Properties of Uranpyrochlore

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.51 gm/cc
note: Specific Gravity of Uranpyrochlore =6.32 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0014547919
Boson Index = 0.9985452081
Help on Photoelectric: Photoelectric: PEUranpyrochlore = 796.68 barns/electron
U=PEUranpyrochlore x relectron=4,387.24 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1,325,812.01 (Gamma Ray American Petroleum Institute Units)
Concentration of Uranpyrochlore per GRapi unit = 754.25 (PPB)

Uranpyrochlore 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) 22.94 ± 5.74 grams of pure Uranpyrochlore .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 2294.2 ±573.55 grams of pure Uranpyrochlore .

Estimated Radioactivity from Uranpyrochlore - very 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 / 6.71 cm 31,952,945 8.64E-04 1,325,812.01 435.88
100 gm / 3.11 cm 3,195,295 8.64E-05 132,581.20 43.59
10 gm / 1.45 cm 319,529 8.64E-06 13,258.12 4.36
1 gm / 6.71 mm 31,953 8.64E-07 1,325.81 0.44
0.1 gm / 3.11 mm 3,195 8.64E-08 132.58 0.04
0.01 gm / 1.45 mm 320 8.64E-09 13.26 0.00
0.001 gm / 0.67 mm 32 8.64E-10 1.33 0.00

Weight of pure Uranpyrochlore in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.32 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 ( 1.04 % Th) From Sum REE Elements (20.71 % REE)
 

Uranpyrochlore Classification

Help on  Dana Class: Dana Class: 08.02.01.07 (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 Uranpyrochlore 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 Uranpyrochlore :
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 Uranpyrochlore Specimen Label here :

Uranpyrochlore

(U,Ca,Ce)2(Nb,Ta)2O6(OH,F)
Dana No: 08.02.01.07 Strunz No: 04.DH.15
Locality:

 

Notes:

 

 
   
 


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