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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ARGON
1, at 4.2'K
Ar
Cubic F m3m Z = 4
Fm3m
3 .7 .1992
Ref.Str.:
Wyckoff R.W.G. (1963)
* Crystal Structures, 1, 7-10
R: ATOMIC. N.A.D.
Initial data from BDM-file
Lattice parameters (cub. angs.,degr.):
a = 5.256 alpha = 90.0
b = 5.256 beta = 90.0
c = 5.256 gamma = 90.0
Unit cell volume (cub. angs.) = 145.2
Molar volume ( cub.cm/mol.) = 21.86
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 Ar = 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 1 0.5 0.0 0.5
3 1 0.5 0.5 0.0
4 1 0.0 0.5 0.5
X-ray density (g/cm cub.) = 1.83
MU (1/cm) = 224.7 Mass attenuation coefficient (cm**2/g) = 123.0
Selected interatomic distances (cation-anion,anion-anion):
NoP Atom Rad.sph. C.N. Distance NoP N.
(angs.) (angs.)
1 Ar 4.608 12
3.7166 1
3.7166 1
3.7166 1
3.7166 1
3.7166 1
3.7166 1
3.7166 1
3.7166 1
3.7166 1
3.7166 1
3.7166 1
3.7166 1
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 14.705 29.409 0.165 28.22 8 65.3 4561.3
2 2 0 0 17.044 34.088 0.19 20.53 6 59.5 2065.4
3 2 2 0 24.489 48.977 0.269 9.15 12 46.4 1119.1
4 1 1 3 29.082 58.164 0.316 6.19 24 41.5 1214.6
5 2 2 2 30.509 61.018 0.33 5.56 8 40.3 343.5
6 4 0 0 35.889 71.777 0.381 3.94 6 36.9 153.1
7 3 3 1 39.703 79.406 0.415 3.29 24 35.2 464.5
8 4 2 0 40.95 81.9 0.425 3.14 24 34.7 431.4
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 14.705 29.409 3.03455 4561.3 100.0 100.0 5.6
2 2 0 0 17.044 34.088 2.628 2065.4 45.3 45.1 5.7
3 2 2 0 24.489 48.977 1.85828 1119.1 24.5 24.1 5.7
4 1 1 3 29.082 58.164 1.58474 1214.6 26.6 25.8 5.8
5 2 2 2 30.509 61.018 1.51728 343.5 7.5 7.3 5.8
6 4 0 0 35.889 71.777 1.314 153.1 3.4 3.2 5.9
7 3 3 1 39.703 79.406 1.20581 464.5 10.2 9.5 6.0
8 4 2 0 40.95 81.9 1.17528 431.4 9.5 8.8 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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