Abstract
The average structure of the oxygen-deficient perovskite Ba2La2Cu2Sn2O11 can be described by a tetragonal 1ap x 1ap x 4ap subcell that has P4/mmm space group symmetry and cell parameters a = 3.9893 (3), c = 16.232 (1) Å. The subcell does not fully describe the long-range structural features. The structure is periodic only in a statistical sense and contains long-period commensurate modulations that have a dominant periodicity (superlattice) or √2ap x √2ap x 24ap. The structure was determined from a combination of powder X-ray diffraction, time-of-flight neutron diffraction, and transmission electron microscopy. The structure contains copper-oxygen double layers that are interleaved by tin-oxygen double layers. The oxygen vacancies order between copper-oxygen layers and result in the now-familiar square pyramidal coordination of copper. The tin-oxygen octahedra are rotated around [001], and the short-range order (24ap, ≈100 Å) of the sense of the rotations is believed to give rise to the structural modulation. The magnetic susceptibility versus temperature profile indicates the compound is paramagnetic to 4 K.
| Original language | English |
|---|---|
| Pages (from-to) | 1305-1313 |
| Number of pages | 9 |
| Journal | Chemistry of Materials |
| Volume | 4 |
| Issue number | 6 |
| Publication status | Published - 1992 |
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ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)
Cite this
Ba2La2Cu2Sn2O11 : A new layered perovskite with a modulated structure. / Anderson, Mark T.; Poeppelmeier, Kenneth R; Zhang, Jin Ping; Fan, Han Jie; Marks, Laurence D.
In: Chemistry of Materials, Vol. 4, No. 6, 1992, p. 1305-1313.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ba2La2Cu2Sn2O11
T2 - A new layered perovskite with a modulated structure
AU - Anderson, Mark T.
AU - Poeppelmeier, Kenneth R
AU - Zhang, Jin Ping
AU - Fan, Han Jie
AU - Marks, Laurence D.
PY - 1992
Y1 - 1992
N2 - The average structure of the oxygen-deficient perovskite Ba2La2Cu2Sn2O11 can be described by a tetragonal 1ap x 1ap x 4ap subcell that has P4/mmm space group symmetry and cell parameters a = 3.9893 (3), c = 16.232 (1) Å. The subcell does not fully describe the long-range structural features. The structure is periodic only in a statistical sense and contains long-period commensurate modulations that have a dominant periodicity (superlattice) or √2ap x √2ap x 24ap. The structure was determined from a combination of powder X-ray diffraction, time-of-flight neutron diffraction, and transmission electron microscopy. The structure contains copper-oxygen double layers that are interleaved by tin-oxygen double layers. The oxygen vacancies order between copper-oxygen layers and result in the now-familiar square pyramidal coordination of copper. The tin-oxygen octahedra are rotated around [001], and the short-range order (24ap, ≈100 Å) of the sense of the rotations is believed to give rise to the structural modulation. The magnetic susceptibility versus temperature profile indicates the compound is paramagnetic to 4 K.
AB - The average structure of the oxygen-deficient perovskite Ba2La2Cu2Sn2O11 can be described by a tetragonal 1ap x 1ap x 4ap subcell that has P4/mmm space group symmetry and cell parameters a = 3.9893 (3), c = 16.232 (1) Å. The subcell does not fully describe the long-range structural features. The structure is periodic only in a statistical sense and contains long-period commensurate modulations that have a dominant periodicity (superlattice) or √2ap x √2ap x 24ap. The structure was determined from a combination of powder X-ray diffraction, time-of-flight neutron diffraction, and transmission electron microscopy. The structure contains copper-oxygen double layers that are interleaved by tin-oxygen double layers. The oxygen vacancies order between copper-oxygen layers and result in the now-familiar square pyramidal coordination of copper. The tin-oxygen octahedra are rotated around [001], and the short-range order (24ap, ≈100 Å) of the sense of the rotations is believed to give rise to the structural modulation. The magnetic susceptibility versus temperature profile indicates the compound is paramagnetic to 4 K.
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M3 - Article
VL - 4
SP - 1305
EP - 1313
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 6
ER -