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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=75749
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Title
Structures and antiferromagnetic Pr ordering mechanism of Tl (Ba2-x Srx) Pr Cu2 O7-y compounds by Rietveld analysis.
Authors
Fun, H.-K.;Yang, P.;Lai, C.-C.;Ku, H.C.;Lee, T.-J.
Reference
Physica C (1994)
223
, 267-275
Link
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Compound
Ba0.8 Cu2 O6.9 Pr1 Sr1.2 Tl0.938
- Thallium barium strontium praseodymium copper oxide (0.9/0.8/1.2/1/2/6.9)
[
ABC2D2X7
] [
tP13
] [
i h g2 d c a
] [
]
Cell
3.88199(4), 3.88199(4), 12.2737(2), 90., 90., 90.
P4/MMM (123)
V=184.96
Remarks
R=0.034000 : T =300 : X D
Atom (site) Oxid.
x, y, z, B, Occupancy
Tl1
(1a)
3
Ba1
(2h)
2
Sr1
(2h)
2
Pr1
(1d)
3
Cu1
(2g)
1.993
O1
(4i)
-2
O2
(2g)
-2
O3
(1c)
-2
0
0
0
2.40
0.93
0.5
0.5
0.20
0.37
0.4
0.5
0.5
0.20
0.37
0.6
0.5
0.5
0.5
1.22
1
0
0
0.35
0.32
1
0
0.5
0.37
1.1(
1
0
0
0.16
1.5(
1
0.5
0.5
0
1.4(
0.90
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