The crystal structure of Ba{sub 3}CuRu{sub 2}O{sub 9} and comparison to Ba{sub 3}MRu{sub 2}O{sub 9} (M = In, Co, Ni, and Fe)

Journal Article · Sun Aug 01 04:00:00 EDT 1999 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1999.8309· OSTI ID:679255

Rijssenbeek, J T; Cava, R J ^[1]; Huang, Q ^[2]; Erwin, R W ^[2]; Zandbergen, H W ^[3]

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1. Princeton Univ., NJ (United States). Dept. of Chemistry and Materials Inst.
2. National Inst. of Standards and Technology, Gaithersburg, MD (United States). NIST Center for Neutron Research
3. Delft Univ. of Technology (Netherlands). National Inst. for HREM

The crystal structure of Ba{sub 3}CuRu{sub 2}O{sub 9}, determined by powder neutron diffraction, is reported for temperatures of 18--295 K. Structural refinements by powder neutron diffraction for the previously reported compounds Ba{sub 3}MRu{sub 2}O{sub 9} for M = Fe, Co, Ni, and In are also reported. All structures consist of pairs of face-shared RuO{sub 6} octahedra interconnected by corner-sharing MO{sub 6} octahedra. For Ba{sub 3}CuRu{sub 2}O{sub 9}, Jahn-Teller distortion of the CuO{sub 6} octahedra leads to an orthorhombic symmetry structure of space group Cmcm with a = 5.6723(1), b = 20.1722(3), and c = 14.1575(3) {angstrom} at 295 K. For Ba{sub 3}FeRu{sub 2}O{sub 9}, site occupancy disorder is found. Magnetic ordering is observed below 100, 105, and 110 K for M = Cu, Ni, and Co, respectively. The magnetic structures at low temperatures for M = Co and Ni are described and compared to previous reports.

• OSTI ID: 679255
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 146; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
CRYSTAL STRUCTURE
EXPERIMENTAL DATA
JAHN-TELLER EFFECT
LATTICE PARAMETERS
NEUTRON DIFFRACTION
RUTHENIUM OXIDES
X-RAY DIFFRACTION