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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*** W W W - X R A Y P O L ***
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STANNOMICROLITE
1, t-pyrochlore, syn, f-microlite
Sn(2)Ta(2)O(7)
Cubic F d3m Z = 8
Fd3m
19 .4 .1907
Ref.Str.:
Gasperin M. (1955)
* Comptes Rendus Hebdomadaires des Seances
de l'Academie des Sciences, 240, 2340-2342
Reserv:
N.A.D.
Initial data from BDM-file
Lattice parameters (cub. angs.,degr.):
a = 10.48 alpha = 90.0
b = 10.48 beta = 90.0
c = 10.48 gamma = 90.0
Unit cell volume (cub. angs.) = 1151.02
Molar volume ( cub.cm/mol.) = 86.66
Co-ordinates, thermal parameters, occupation for atomic positions:
NoP x/a y/b z/c B(j) atom / occupation
1 0.625 0.625 0.625 0.0 Sn = 1.00
2 0.125 0.125 0.125 0.0 Ta = 1.00
3 0.5 0.5 0.5 0.0 O = 1.00
4 0.2 0.0 0.0 0.0 O = 1.00
Co-ordinates for all atomic positions :
No NoP x/a y/b z/c
1 1 0.625 0.625 0.625
2 2 0.125 0.125 0.125
3 3 0.5 0.5 0.5
4 4 0.2 0.0 0.0
5 1 0.125 0.375 0.875
6 1 0.375 0.875 0.125
7 1 0.875 0.125 0.375
8 2 0.625 0.875 0.375
9 2 0.875 0.375 0.625
10 2 0.375 0.625 0.875
11 3 0.25 0.25 0.75
12 3 0.5 0.0 0.0
13 3 0.75 0.25 0.25
14 4 0.75 0.95 0.25
15 4 0.8 0.5 0.5
16 4 0.25 0.55 0.75
17 1 0.125 0.875 0.375
18 1 0.875 0.375 0.125
19 1 0.375 0.125 0.875
20 2 0.625 0.375 0.875
21 2 0.375 0.875 0.625
22 2 0.875 0.625 0.375
23 3 0.25 0.75 0.25
24 3 0.0 0.5 0.0
25 4 0.75 0.45 0.75
26 4 0.3 0.0 0.5
27 4 0.75 0.55 0.25
28 1 0.375 0.375 0.625
29 1 0.375 0.625 0.375
30 1 0.125 0.625 0.125
31 1 0.875 0.625 0.875
32 1 0.125 0.125 0.625
33 1 0.625 0.375 0.375
34 1 0.625 0.125 0.125
35 1 0.625 0.875 0.875
36 1 0.875 0.875 0.625
37 2 0.875 0.875 0.125
38 2 0.875 0.125 0.875
39 2 0.625 0.125 0.625
40 2 0.375 0.125 0.375
41 2 0.625 0.625 0.125
42 2 0.125 0.875 0.875
43 2 0.125 0.625 0.625
44 2 0.125 0.375 0.375
45 2 0.375 0.375 0.125
46 3 0.75 0.75 0.75
47 3 0.0 0.0 0.5
48 4 0.8 0.0 0.0
49 4 0.75 0.05 0.75
50 4 0.7 0.0 0.5
51 4 0.25 0.05 0.25
52 4 0.7 0.5 0.0
53 4 0.25 0.95 0.75
54 4 0.2 0.5 0.5
55 4 0.25 0.45 0.25
56 4 0.3 0.5 0.0
57 4 0.0 0.2 0.0
58 4 0.95 0.75 0.25
59 4 0.5 0.8 0.5
60 4 0.55 0.25 0.75
61 4 0.45 0.75 0.75
62 4 0.0 0.3 0.5
63 4 0.55 0.75 0.25
64 4 0.0 0.8 0.0
65 4 0.05 0.75 0.75
66 4 0.0 0.7 0.5
67 4 0.05 0.25 0.25
68 4 0.5 0.7 0.0
69 4 0.95 0.25 0.75
70 4 0.5 0.2 0.5
71 4 0.45 0.25 0.25
72 4 0.5 0.3 0.0
73 4 0.0 0.0 0.2
74 4 0.25 0.75 0.95
75 4 0.5 0.5 0.8
76 4 0.75 0.25 0.55
77 4 0.75 0.75 0.45
78 4 0.0 0.5 0.3
79 4 0.25 0.75 0.55
80 4 0.0 0.0 0.8
81 4 0.75 0.75 0.05
82 4 0.0 0.5 0.7
83 4 0.25 0.25 0.05
84 4 0.5 0.0 0.7
85 4 0.75 0.25 0.95
86 4 0.5 0.5 0.2
87 4 0.25 0.25 0.45
88 4 0.5 0.0 0.3
X-ray density (g/cm cub.) = 8.21
MU (1/cm) = 1409.105 Mass attenuation coefficient (cm**2/g) = 171.71
Selected interatomic distances (cation-anion,anion-anion):
NoP Atom Rad.sph. C.N. Distance NoP N.
(angs.) (angs.)
1 Sn 2.856 8
2.269 3
2.6069 4
2.6069 4
2.269 3
2.6069 4
2.6069 4
2.6069 4
2.6069 4
2 Ta 2.424 6
2.0125 4
2.0125 4
2.0125 4
2.0125 4
2.0125 4
2.0125 4
3 O 3.264 6
3.144 4
3.144 4
3.144 4
3.144 4
3.144 4
3.144 4
4 O 3.264 9
3.144 3
2.7228 4
2.7228 4
2.9642 4
2.9642 4
2.9642 4
2.7228 4
2.9642 4
2.7228 4
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 7.314 14.628 0.083 120.45 8 167.7 2046.0
2 2 2 0 11.999 23.997 0.135 43.4 12 12.8 6.4
3 1 1 3 14.109 28.219 0.158 30.82 24 174.9 1708.3
4 2 2 2 14.751 29.501 0.165 28.03 8 1600.6 43367.1
5 4 0 0 17.098 34.195 0.191 20.39 6 1285.1 15247.0
6 3 3 1 18.686 37.372 0.208 16.78 24 7.1 1.6
7 4 2 0 19.19 38.38 0.213 15.82 24 0.0 0.0
8 2 2 4 21.105 42.21 0.234 12.8 24 66.2 101.7
9 1 1 5 22.452 44.905 0.248 11.14 24 54.8 60.6
10 3 3 3 22.452 44.905 0.248 11.14 8 278.6 522.2
11 4 4 0 24.568 49.137 0.27 9.08 12 1543.6 19601.5
12 5 3 1 25.775 51.549 0.282 8.14 48 113.0 376.7
13 4 4 2 26.168 52.335 0.286 7.87 24 0.0 0.0
14 6 2 0 27.701 55.402 0.302 6.91 24 65.9 54.3
15 3 3 5 28.814 57.629 0.313 6.32 24 159.7 292.0
16 2 2 6 29.179 58.359 0.316 6.14 24 1300.6 18829.5
17 4 4 4 30.612 61.224 0.331 5.52 8 1188.9 4710.5
18 1 1 7 31.661 63.322 0.341 5.12 24 77.4 55.7
19 5 5 1 31.661 63.322 0.341 5.12 24 180.5 302.3
20 6 4 0 32.007 64.013 0.344 5.0 24 0.0 0.0
21 6 4 2 33.369 66.737 0.357 4.58 48 17.1 4.9
22 5 5 3 34.372 68.744 0.366 4.3 24 76.2 45.3
23 7 3 1 34.372 68.744 0.366 4.3 48 171.5 458.5
24 8 0 0 36.015 72.03 0.382 3.92 6 1271.5 2867.4
25 3 3 7 36.986 73.973 0.391 3.72 24 4.6 0.1
26 4 4 6 37.308 74.616 0.393 3.66 24 0.0 0.0
27 8 2 0 37.308 74.616 0.393 3.66 24 0.0 0.0
28 2 2 8 38.585 77.169 0.405 3.45 24 93.0 54.1
29 6 6 0 38.585 77.169 0.405 3.45 12 102.3 32.7
30 5 5 5 39.533 79.067 0.413 3.32 8 13.0 0.3
31 7 5 1 39.533 79.067 0.413 3.32 48 96.5 111.8
32 6 6 2 39.848 79.697 0.416 3.27 24 1127.6 7541.0
33 8 4 0 41.102 82.204 0.427 3.13 24 1064.9 6423.7
34 1 1 9 42.038 84.075 0.435 3.03 24 107.1 63.1
35 7 5 3 42.038 84.075 0.435 3.03 48 58.4 37.5
36 8 4 2 42.349 84.697 0.437 3.01 48 0.0 0.0
37 6 6 4 43.59 87.18 0.448 2.91 24 61.6 20.0
38 9 3 1 44.519 89.038 0.455 2.85 48 111.7 128.9
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 7.314 14.628 6.05063 2046.0 4.7 4.8 5.6
2 1 1 3 14.109 28.219 3.15984 1708.3 3.9 3.9 5.6
3 2 2 2 14.751 29.501 3.02532 43367.1 100.0 100.0 5.6
4 4 0 0 17.098 34.195 2.62 15247.0 35.2 35.0 5.7
5 3 3 3 22.452 44.905 2.01688 582.8 1.3 1.3 5.7
6 4 4 0 24.568 49.137 1.85262 19601.5 45.2 44.3 5.7
7 2 2 6 29.179 58.359 1.57992 18829.5 43.4 42.1 5.8
8 4 4 4 30.612 61.224 1.51266 4710.5 10.9 10.5 5.8
9 7 3 1 34.372 68.744 1.36438 503.8 1.2 1.1 5.9
10 8 0 0 36.015 72.03 1.31 2867.4 6.6 6.3 5.9
11 6 6 2 39.848 79.697 1.20214 7541.0 17.4 16.2 6.0
12 8 4 0 41.102 82.204 1.1717 6423.7 14.8 13.7 6.1
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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