Uranopolycrase Mineral Data

Uranopolycrase Mineral Data +

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General Uranopolycrase Information

Chemical Formula:

(U,Y)(Ti,Nb,Ta)2O6

Composition:

Molecular Weight = 415.77 gm

Yttrium 6.42 % Y 8.15 % Y₂O₃

Thorium 5.58 % Th 6.35 % ThO₂

Uranium 34.35 % U 38.97 % UO₂

Tantalum 4.35 % Ta 5.31 % Ta₂O₅

Titanium 17.27 % Ti 28.82 % TiO₂

Niobium 8.94 % Nb 12.79 % Nb₂O₅

Oxygen 23.09 % O

______ ______

100.00 % 100.38 % = TOTAL OXIDE

Empirical Formula:

U_0.6Y_0.3Th_0.1Ti_1.5Nb_0.4Ta_0.1O₆

Environment:

Zoned pegmatite vein near the contact with granodiorite.

IMA Status:

Approved IMA 1993

Locality:

San Piero in Campo, Elba, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for its content or URANium and relation to polycrase.

Synonym:

IMA1990-046

Uranopolycrase Image

Images:

Uranopolycrase

Comments: Brownish-black uranopolycrase microcrystals on quartz.
Location: Fonte del Prete, near San Piero in Campo, Elba, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Uranopolycrase

Comments: Brown to black, paper thin, elongated uranopolycrase crystals to 1mm.
Location: Cavetta Bassa, Elba Isle, Livorno Province, Tuscany, Italy. Scale: Picture size 2 mm.
© Tom Loomis / Dakota Matrix

Uranopolycrase Crystallography

Axial Ratios:

a:b:c =2.6106:1:0.9307

Cell Dimensions:

a = 14.51, b = 5.558, c = 5.173, Z = 3; V = 417.18 Den(Calc)= 4.96

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P bcn

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

By Intensity(I/I_o): 2.99(1), 1.9(0.5), 1.48(0.4),

Crystal Structure:

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Aurisicchio C , Orlandi P , Pasero M , Perchiazzi N , European Journal of Mineralogy , 5 (1993) p.1161-1165, Uranopolycrase, the uranium-dominant analogue of polycrase-(Y),, a new mineral from Elba Island, Italy, and its crystal structure, Locality: Elba Island, Italy

Physical Properties of Uranopolycrase

Cleavage:

[100] Good

Color:

Brown red.

Density:

5.5 - 6, Average = 5.75

Diaphaniety:

Opaque

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

5-6 - Between Apatite and Orthoclase

Luminescence:

Radioactive.

Luster:

Adamantine

Streak:

grayish brown

Optical Properties of Uranopolycrase

Optical Data:

Isotropic.

NCalc= 2.09 - from Gladstone-Dale relationship (KC = 0.219) where Ncalc=Dcalc*KC+1
NCalc= 2.26 - from Gladstone-Dale relationship (KC = 0.219) where Ncalc=Dmeas*KC+1

RL Color:

Pale gray with bluish tint and dark red-brown internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Uranopolycrase in Air**
λ	R	∑ R(λ)
470 nm	23.60
546 nm	21.50
589 nm	22.30
650 nm	25.10

**Calculated Relative Intensity Colors of Uranopolycrase in Air**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%
R

Calculated Properties of Uranopolycrase

Electron Density:

r_electron=4.31 gm/cc
note: r_{Uranopolycrase}=4.96 gm/cc.

Fermion Index

Fermion Index = 0.02492
Boson Index = 0.97508

Photoelectric:

PE_{Uranopolycrase}=1,110.12 barns/electron
U=PE_{Uranopolycrase} x r_electron=4,783.56 barns/cc.

Radioactivity:

GRapi = 2,647,116.33 (Gamma Ray American Petroleum Institute Units)

Uranopolycrase 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) 11.49 ± 2.87 grams of pure Uranopolycrase .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1149.0 ±287.26 grams of pure Uranopolycrase .

**Estimated Radioactivity from Uranopolycrase** - 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 / 7.28 cm	63,987,397	1.73E-03	2,647,116.33	870.28
100 gm / 3.38 cm	6,398,740	1.73E-04	264,711.63	87.03
10 gm / 1.57 cm	639,874	1.73E-05	26,471.16	8.70
1 gm / 7.28 mm	63,987	1.73E-06	2,647.12	0.87
0.1 gm / 3.38 mm	6,399	1.73E-07	264.71	0.09
0.01 gm / 1.57 mm	640	1.73E-08	26.47	0.01
0.001 gm / 0.73 mm	64	1.73E-09	2.65	0.00

Weight of pure Uranopolycrase in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.96 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

Uranopolycrase Classification

Dana Class:

8.3.8.5 (8)Multiple Oxides with Nb, Ta, and Ti

(8.3)where A (B2O6)

(8.3.8)Dana Group

8.3.8.1 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m

8.3.8.2 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m

8.3.8.3 Tanteuxenite-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 Pcan 2/m 2/m 2/m

8.3.8.4 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho

8.3.8.5 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m

Strunz Class:

IV/D.19-15 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.19 - Polycrase-(Y) - Loranskite-(Y) series

IV/D.19-10 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m

IV/D.19-15 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m

IV/D.19-20 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho

IV/D.19-30 Fersmite (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 Pcan 2/m 2/m 2/m

IV/D.19-40 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m

IV/D.19-60 Samarskite-(Y) (Y,Fe,U)(Nb,Ta)5O4 P bcn 2/m 2/m 2/m

IV/D.19-70 Ishikawaite (U,Fe,Y,Ca)(Nb,Ta)O4(?) Unk Ortho

IV/D.19-80 Yttrocolumbite-(Y) (Y,U,Fe)(Nb,Ta)O4 Unk Ortho

IV/D.19-90 Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 I2/a 2/m

IV/D.19-100 Loranskite-(Y) (Y,Ce,Ca)ZrTaO6(?) Unk Ortho

Other Uranopolycrase Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Am.Min.,Vol.79,p766,1994) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Uranopolycrase :
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 - WWW-MINCRYST 14 -École des Mines de Paris

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

Uranopolycrase

(U,Y)(Ti,Nb,Ta)2O6
Dana No: 8.3.8.5 Strunz No: IV/D.19-15
Locality:

Notes: