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CC=Collection Code: [AB2X4]=ANX Form: [cF56]=Pearson: [e d a]=Wyckoff Symbol: [Al2MgO4]=Structure Type:
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Title
Single-crystal structure refinements and crystal chemistry of synthetic trioctahedral micas K M3 (Al(3+), Si(3+))4 O10 (O H)2, where M = Ni(2+), Mg(2+), Co(2+), Fe(2+) or Al(3+).
Authors
Redhammer, G.J.;Roth, G.
Reference
IC&volume=87&fpage=146&details=yes target=icsd_help>American Mineralogist (2002)
87
, 146-147
Link
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Compound
H2 Al1.996 Fe2.554 K1 O12 Si2.45
-
[Biotite]
Potassium iron aluminium alumosilicate hydroxide *
[
AB3C4X12
] [
mS44
] [
j3 i2 h d a
] [
]
Cell
5.3741(14), 9.3083(19), 10.2829(29), 90, 100.220(32), 90
C12/M1 (12)
V=506.23
Remarks
R=0.028700 : M =Biotite :
Atom (site) Oxid.
x, y, z, B, Occupancy
Si1
(8j)
4
Al1
(8j)
3
Fe1
(2d)
2.041
Al2
(2d)
3
Fe2
(4h)
2.041
Al3
(4h)
3
K1
(2a)
1
O1
(8j)
-2
O2
(4i)
-2
O3
(8j)
-2
O4
(4i)
-2
H1
(4i)
1
0.57
0.16
0.22
0.97
0.61
0.57
0.16
0.22
0.97
0.38
0.
0.5
0.5
0.82
0.85
0.
0.5
0.5
0.82
0.14
0.
0.83
0.5
0.83
0.85
0.
0.83
0.5
0.83
0.14
0.
0.
0.
2.89
1
0.82
0.22
0.16
1.95
1
0.51
0.
0.17
1.85
1
0.63
0.16
0.39
1.42
1
0.12
0.
0.39
1.52
1.
0.11
0.
0.30
2.35
1
Atom (site) Oxid.
U11, U22, U33, U12, U13, U23
Si1
(8j)
4
Al1
(8j)
3
Fe1
(2d)
2.041
Al2
(2d)
3
Fe2
(4h)
2.041
Al3
(4h)
3
K1
(2a)
1
O1
(8j)
-2
O2
(4i)
-2
O3
(8j)
-2
O4
(4i)
-2
H1
(4i)
1
0.01
0.01
0.01
-0.0
0.00
-0.0
0.01
0.01
0.01
-0.0
0.00
-0.0
0.00
0.00
0.01
0.
0.00
0.
0.00
0.00
0.01
0.
0.00
0.
0.00
0.00
0.01
0.
0.00
0.
0.00
0.00
0.01
0.
0.00
0.
0.03
0.03
0.03
0.
0.00
0.
0.02
0.02
0.02
-0.0
0.00
-0.0
0.03
0.01
0.02
0.
0.00
0.
0.01
0.01
0.01
-0.0
0.00
0.00
0.01
0.02
0.01
0.
0.00
0.
0
0
0
0
0
0
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