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CC=Collection Code: [AB2X4]=ANX Form: [cF56]=Pearson: [e d a]=Wyckoff Symbol: [Al2MgO4]=Structure Type:
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CC=77747
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Title
Quantitative determination of chrysotile asbestos in bulk materials by combined Rietveld and RIR methods.
Authors
Gualtieri, A.;Artioli, G.
Reference
Powder Diffraction (1995)
10
, 269-272
Link
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Compound
H4 Mg3 O9 Si2
-
[Clinochrysotile 2Mc1]
Trimagnesium disilicate tetrahydroxide
[
A2B3X9
] [
mS36
] [
b5 a4
] [
]
Cell
5.258(3), 9.190(5), 14.630(8), 90., 94.11(5), 90.
C1M1 (8)
V=705.12
Remarks
R=0.128000 : M =Clinochrysotile 2Mc1 : X
At least one temperature factor is implausible or meaningless but agrees with the value given in the paper.
The coordinates are those given in the paper but the atomic distances do not agree with those calculated during testing.The coordinates are probably correct.
z(O4) was misprinted as .275, structure of one out of two layer
Cylindrically curved layers, given space group: C2/m
Atom (site) Oxid.
x, y, z, B, Occupancy
Si1
(4b)
4
Mg1
(2a)
2
Mg2
(4b)
2
O1
(2a)
-2
O2
(4b)
-2
O3
(4b)
-2
O4
(2a)
-2
O5
(2a)
-2
O6
(4b)
-2
H1
(4*)
1
0.50
0.16
0.03
0.01
1
0.63
0
0.24
0.13
1
0.15
0.17
0.20
0.14
1
0.5
0
0
0.54
1
0.75
0.25
0
0.50
1
0.49
0.14
0.14
0.49
1
0.51
0.5
0.17
0.50
1.
0.76
0.5
0.28
0.56
1.
0.35
0.32
0.28
0.59
1.
0
2.
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