Uranpyrochlore Mineral Data

Advertisment

Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

General Uranpyrochlore Information

Chemical Formula:

(U,Ca,Ce)2(Nb,Ta)2O6(OH,F)

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

Empirical Formula:

U_0.4Ca_0.7Ce_0.8Nb_1.1Ta_0.5O₆(OH)_0.9F_0.1

Environment:

Cemented calcareous tuffs associated with carbonatite.

IMA Status:

Approved IMA 1977

Locality:

Kasenda, Fort Portal area, Uganda. Link to MinDat.org Location Data.

Name Origin:

Named for its URANium content and membership in the pyrochlore group.

Name Pronunciation:

Uranpyrochlore + Pronunciation

Synonym:

Hatchettolite

Uranpyrochlore Image

Images:

Click Here for Larger Uranpyrochlore Image

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

Cell Dimensions:

a = 10.44, Z = 8; V = 1,137.89 Den(Calc)= 6.32

Crystal System:

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

Cleavage:

None

Color:

Yellow brown, Red, Reddish brown, Black.

Density:

4.8

Diaphaneity:

Translucent to Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Octahedral Crystals - Occurs as octahedral shaped crystals.

Hardness:

5 - Apatite

Luminescence:

Non-fluorescent.

Luster:

Resinous

Streak:

brownish yellow

Optical Properties of Uranpyrochlore

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

Optical Data:

Isotropic, n=1.98.

Calculated Properties of Uranpyrochlore

Electron Density:

Bulk Density (Electron Density)=5.51 gm/cc
note: Specific Gravity of Uranpyrochlore =6.32 gm/cc.

Fermion Index:

Fermion Index = 0.0014547919
Boson Index = 0.9985452081

Photoelectric:

PE_{Uranpyrochlore}= 796.68 barns/electron
U=PE_{Uranpyrochlore} x r_electron=4,387.24 barns/cc.

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 Becquerels (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

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

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

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 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

Search for Uranpyrochlore using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Uranpyrochlore :

A Bijoux Google Search for Uranpyrochlore
Adam's Minerals Google Search for Uranpyrochlore
Cape Minerals Google Search for Uranpyrochlore
Dakota Matrix Minerals Google Search for Uranpyrochlore
Excalibur Mineral Corp. Google Search for Uranpyrochlore
Exceptional Minerals Google Search for Uranpyrochlore
John Betts Fine Minerals Search for Uranpyrochlore
McDougall Minerals Google Search for Uranpyrochlore
Mineral News Website Link
Rock and Mineral Shows Google Search for Uranpyrochlore
Weinrich Minerals, Inc. Google Search for Uranpyrochlore

Ask about Uranpyrochlore 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 Español

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: