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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=41079
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Title
Phase transition orthorhombic <-> rutile in the oxyfluoride phases Ax Fex Ni1-x O4x F2(1-x) (A= Nb5+, Ta5+, and x>0.3). Influence on the magnetic properties.
Authors
Bayi, F.;Pourroy, G.;Poix, P.;Derory, A.
Reference
IC&volume=100&fpage=16&details=yes target=icsd_help>Journal of Solid State Chemistry (1992)
100
, 16-23
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Also:
Phase Transition (1992)
38
, 127-220
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Compound
Fe1 O4 Ta1
- Iron(III) tantalum oxide
[
AX2
] [
tP6
] [
f a
] [
TiO2(tP6)
]
Cell
4.682(5), 4.682, 3.048(5), 90., 90., 90.
P42/MNM (136)
V=66.82
Remarks
P =43-798 : T =TiO2(tP6) : X
No R value given in the paper.
At least one temperature factor missing in the paper.
Stable up to 1023 K (2nd ref. , Tomaszewski), above Pbcn
O-position from 9517, rutile-type
Atom (site) Oxid.
x, y, z, B, Occupancy
Fe1
(2a)
3
Ta1
(2a)
5
O1
(4f)
-2
0
0
0
0
0.5
0
0
0
0
0.5
0.29
0.29
0
0
1
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