Institute of Experimental Mineralogy
Russian Academy of Sciences
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142432, Chernogolovka, Moscow district
A.V. Chichagov +7(496)52-22320
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URANINITE
1, t-def. fluorite, g-uraninite
UO(2)
Cubic F m3m Z = 4
Fm3m
21 .4 .1992
Ref.Str.:
Wyckoff R.W.J. (1978)
* Crystal Structures, 1, 243
Initial data from BDM-file
Lattice parameters (cub. angs.,degr.):
a = 5.4682 alpha = 90.0
b = 5.4682 beta = 90.0
c = 5.4682 gamma = 90.0
Unit cell volume (cub. angs.) = 163.51
Molar volume ( cub.cm/mol.) = 24.62
Co-ordinates, thermal parameters, occupation for atomic positions:
NoP x/a y/b z/c B(j) atom / occupation
1 0.0 0.0 0.0 0.0 U = 1.00
2 0.25 0.25 0.25 0.0 O = 1.00
Co-ordinates for all atomic positions :
No NoP x/a y/b z/c
1 1 0.0 0.0 0.0
2 2 0.25 0.25 0.25
3 2 0.75 0.75 0.75
4 2 0.75 0.25 0.25
5 2 0.75 0.75 0.25
6 2 0.25 0.75 0.25
7 2 0.25 0.75 0.75
8 2 0.25 0.25 0.75
9 2 0.75 0.25 0.75
10 1 0.5 0.0 0.5
11 1 0.5 0.5 0.0
12 1 0.0 0.5 0.5
X-ray density (g/cm cub.) = 10.97
MU (1/cm) = 3417.516 Mass attenuation coefficient (cm**2/g) = 311.651
Selected interatomic distances (cation-anion,anion-anion):
NoP Atom Rad.sph. C.N. Distance NoP N.
(angs.) (angs.)
1 U 2.88 8
2.3678 2
2.3678 2
2.3678 2
2.3678 2
2.3678 2
2.3678 2
2.3678 2
2.3678 2
2 O 3.264 6
2.7341 2
2.7341 2
2.7341 2
2.7341 2
2.7341 2
2.7341 2
X-ray diffraction powder data (II), X-Ray W.L. = 1.54056(angs.):
No H K L Theta 2*Theta S LPG MF F I int.
( degree ) *100
1 1 1 1 14.122 28.244 0.158 30.76 8 302.1 84037.9
2 2 0 0 16.364 32.727 0.183 22.42 6 245.7 30368.8
3 2 2 0 23.48 46.96 0.259 10.07 12 304.8 41987.0
4 1 1 3 27.853 55.705 0.303 6.83 24 252.4 39045.4
5 2 2 2 29.207 58.415 0.317 6.13 8 216.8 8623.4
6 4 0 0 34.296 68.591 0.366 4.32 6 260.8 6597.1
7 3 3 1 37.881 75.761 0.399 3.56 24 225.0 16190.4
8 4 2 0 39.048 78.096 0.409 3.38 24 198.4 11954.1
9 2 2 4 43.638 87.276 0.448 2.91 24 234.2 14319.7
X-ray diffraction powder data (I)...X-Ray wave length = 1.54056 (angs.):
No H K L Theta 2*Theta d I int I int.n. I p.h.n. H(Si)
( degree ) (angstrem) *100 *100
1 1 1 1 14.122 28.244 3.15707 84037.9 100.0 100.0 5.6
2 2 0 0 16.364 32.727 2.7341 30368.8 36.1 36.0 5.6
3 2 2 0 23.48 46.96 1.9333 41987.0 50.0 49.1 5.7
4 1 1 3 27.853 55.705 1.64872 39045.4 46.5 45.1 5.8
5 2 2 2 29.207 58.415 1.57853 8623.4 10.3 9.9 5.8
6 4 0 0 34.296 68.591 1.36705 6597.1 7.9 7.5 5.9
7 3 3 1 37.881 75.761 1.25449 16190.4 19.3 18.1 6.0
8 4 2 0 39.048 78.096 1.22273 11954.1 14.2 13.3 6.0
9 2 2 4 43.638 87.276 1.11619 14319.7 17.0 15.6 6.2
Reference:
Chichagov A.V. et al.
Information-Calculating System on Crystal Structure Data of Minerals
(MINCRYST)
- Kristallographiya, v.35, n.3, 1990, p.610-616 (in Russian)
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