Ba2La2Cu2Sn2O11: A new layered perovskite with a modulated structure

Mark T. Anderson, Kenneth R Poeppelmeier, Jin Ping Zhang, Han Jie Fan, Laurence D. Marks

Research output: Contribution to journalArticle

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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 languageEnglish
Pages (from-to)1305-1313
Number of pages9
JournalChemistry of Materials
Volume4
Issue number6
Publication statusPublished - 1992

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Perovskite
Oxygen
Copper
Tin
Modulation
Periodic structures
Oxygen vacancies
Neutron diffraction
Magnetic susceptibility
X ray powder diffraction
perovskite
Transmission electron microscopy
Temperature

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

Cite this

Anderson, M. T., Poeppelmeier, K. R., Zhang, J. P., Fan, H. J., & Marks, L. D. (1992). Ba2La2Cu2Sn2O11: A new layered perovskite with a modulated structure. Chemistry of Materials, 4(6), 1305-1313.

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 journalArticle

Anderson, MT, Poeppelmeier, KR, Zhang, JP, Fan, HJ & Marks, LD 1992, 'Ba2La2Cu2Sn2O11: A new layered perovskite with a modulated structure', Chemistry of Materials, vol. 4, no. 6, pp. 1305-1313.
Anderson, Mark T. ; Poeppelmeier, Kenneth R ; Zhang, Jin Ping ; Fan, Han Jie ; Marks, Laurence D. / Ba2La2Cu2Sn2O11 : A new layered perovskite with a modulated structure. In: Chemistry of Materials. 1992 ; Vol. 4, No. 6. pp. 1305-1313.
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