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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
Crystal chemistry of Mg-, Fe-bearing muscovites - 2M1.
Authors
Brigatti, M.F.;Frigieri, P.;Poppi, L.
Reference
IC&volume=83&fpage=775&details=yes target=icsd_help>American Mineralogist (1998)
83
, 775-785
Link
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Compound
H1.78 Al2.35 F0.22 Fe0.35 K1 Mn0.02 O11.78 Si3.3
-
[Muscovite 2M1, phengitic]
Potassium aluminium iron manganese phyllo-alumosilicate hydroxide fluoride *
[
AB50C100D200X600
] [
mS83
] [
f9 e d
] [
]
Cell
5.226(1), 9.074(2), 20.039(2), 90., 95.74(1), 90.
C12/C1 (15)
V=945.5
Remarks
R=0.025400 : D M =Muscovite 2M1, phengitic : P =6-263 :
Mean T-O: 1.639, 1.640, M-O: 1.953, 2.230
Some cations in 4d: .75 .25 0 (~ 4% occupancy)
Sample GA1
Atom (site) Oxid.
x, y, z, B, Occupancy
K1
(4e)
1
Si1
(8f)
4
Al1
(8f)
3
Si2
(8f)
4
Al2
(8f)
3
Al3
(8f)
3
Fe1
(8f)
2
Mn1
(4d)
2
O1
(8f)
-2
O2
(8f)
-2
O3
(8f)
-2
O4
(8f)
-2
O5
(8f)
-2
O6
(8f)
-2
F1
(8f)
-1
H1
(8*)
1
0
0.09
0.25
0
1
0.45
0.25
0.13
0
0.81
0.45
0.25
0.13
0
0.19
0.96
0.42
0.13
0
0.81
0.96
0.42
0.13
0
0.19
0.24
0.08
0.00
0
0.82
0.24
0.08
0.00
0
0.17
0.75
0.25
0
0.73
0.02
0.74
0.32
0.15
0
1
0.24
0.36
0.16
0
1
0.43
0.09
0.16
0
1
0.39
0.25
0.05
0
1
0.95
0.43
0.05
0
1
0.95
0.06
0.05
0
0.89
0.95
0.06
0.05
0
0.11
0
0.89
Atom (site) Oxid.
Beta11, Beta22, Beta33, Beta12, Beta13, Beta23
K1
(4e)
1
Si1
(8f)
4
Al1
(8f)
3
Si2
(8f)
4
Al2
(8f)
3
Al3
(8f)
3
Fe1
(8f)
2
Mn1
(4d)
2
O1
(8f)
-2
O2
(8f)
-2
O3
(8f)
-2
O4
(8f)
-2
O5
(8f)
-2
O6
(8f)
-2
F1
(8f)
-1
H1
(8*)
1
0.01
0.00
0.00
0
0.00
0
0.00
0.00
0.00
0.00
-.00
0.00
0.00
0.00
0.00
0.00
-.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0
0
0
0
0
0
0.00
0.00
0.00
-.00
-.00
0.00
0.01
0.00
0.00
0.00
0.00
-.00
0.01
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.01
0.00
0.00
-.00
0.00
0.00
0.01
0.00
0.00
0.00
0.00
-.00
0.01
0.00
0.00
0.00
0.00
-.00
0
0
0
0
0
0
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