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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
The important role of pyramidal copper layers of the 123-structure in superconductivity. The oxides Ba2Y1-xCaxCu3-xFexO7 and Ba2Y1-xCaxCu3-xFexO6.
Authors
Suard, E.;Caignaert, V.;Maignan, A.;Raveau, B.
Reference
Physica C (1991)
182
, 219-227
Link
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Compound
Ba2 Ca0.24 Cu2.76 Fe0.24 O7.07 Y0.76
- Yttrium calcium barium copper iron(III) oxide (0.8/0.2/2/2.8/0.2/7.1)
[
AB2C3X7
] [
oP13
] [
t s r q2 h e b a
] [
]
Cell
3.8263(1), 3.8263(1), 11.6643(3), 90., 90., 90.
PMMM (47)
V=170.77
Remarks
R=0.063000 : N D
Atom (site) Oxid.
x, y, z, B, Occupancy
Y1
(1h)
3
Ca1
(1h)
2
Ba1
(2t)
2
Cu1
(1a)
2.413
Cu2
(2q)
2.413
Fe1
(2q)
3
O1
(2r)
-2
O2
(2s)
-2
O3
(2q)
-2
O4
(1b)
-2
O5
(1e)
-2
0.5
0.5
0.5
0.70
0.76
0.5
0.5
0.5
0.70
0.24
0.5
0.5
0.18
0.75
1
0
0
0
0.53
1
0
0
0.35
0.70
0.88
0
0
0.35
0.70
0.12
0
0.5
0.37
0.95
1
0.5
0
0.37
0.76
1
0
0
0.15
0.88
1
0.5
0
0
2.78
0.93
0
0.5
0
2.78
0.14
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