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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=65738
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Title
K4 Al2 Nb11 O20 F - "missing link" der Clusterkondensation.
Authors
Simon, A.;Koehler, J.;Tischtau, R.;Miller, G.
Reference
IC&volume=101&fpage=169&details=yes target=icsd_help>Angewandte Chemie (1989)
101
, 169-169
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Compound
Al2 F1 K4 Nb11 O20
- Tetrapotassium 20-oxodialumofluorononaniobate(III) niobate(II)
[
A2B2C4D9XY20
] [
tI76
] [
n m2 j h e d b a
] [
]
Cell
8.7857(6), 8.7857(6), 12.637(1), 90., 90., 90.
I4/MMM (139)
V=975.43
Remarks
R=0.082700 : M =Nb :
At least one temperature factor is implausible or meaningless but agrees with the value given in the paper.
Atom (site) Oxid.
x, y, z, B, Occupancy
Nb1
(2a)
3
Nb2
(4e)
2
Nb3
(16m)
3
Al1
(4d)
3
K1
(8j)
1
O1
(16m)
-2
O2
(16n)
-2
O3
(8h)
-2
F1
(2b)
-1
0
0
0
0.00
1
0
0
0.31
0.01
1
0.16
0.16
0.16
0.00
1
0.5
0
0.25
0.02
1
0.31
0
0.5
0.01
1
0.83
0.83
0.33
0.00
1
0.33
0
0.17
0.01
1
0.82
0.17
0
0.00
1
0
0
0.5
0.13
1
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