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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=41632
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Title
Synthesis and characterization of compounds Sr2 R M Cu2 O8-d (R = Pr, Nd, Sm, Eu, Gd; M = Nb, Ta).
Authors
Vybornov, M.;Perthold, W.;Michor, H.;Holubar, T.;Hilscher, G.;Rogl, P.;Fischer, P.;Divis, M.
Reference
Physical Review, Serie 3. B - Condensed (1995)
52
, 138-140
Link
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Compound
Cu2 Gd0.99 O8 Sr2 Ta0.97
- Strontium gadolinium tantalum copper oxide (2/0.99/0.97/2/8)
[
ABC2D2X8
] [
tI56
] [
l h g f2 c b
] [
]
Cell
5.4710(1), 5.4710(1), 23.31949(50), 90., 90., 90.
I4/MCM (140)
V=698.
Remarks
R=0.042000 : X D
At least one temperature factor is implausible or meaningless but agrees with the value given in the paper.
R(Bragg)=0.058
Atom (site) Oxid.
x, y, z, B, Occupancy
Sr1
(8g)
2
Gd1
(4b)
3
Ta1
(4c)
5
Cu1
(8f)
2.09
O1
(8f)
-2
O2
(16l)
-2
O3
(8h)
-2
0
0.5
0.10
0.57
1
0
0.5
0.25
0.27
0.99
0
0
0
0.09
0.97
0
0
0.17
0.10
1
0
0
0.08
0.93
1
0.24
0.74
0.18
0.3(
1
0.31
0.81
0
2.7(
1
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