Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 196, Issue -, Pages 225-231Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2012.06.022
Keywords
Layered compound; Honeycomb ordering; Solid solution; X-ray diffraction
Funding
- NSF [DMR 0804167]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0947094] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [804167] Funding Source: National Science Foundation
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Three complete solid solutions between the layered phases P2-Na2M2TeO6 (M=Co, Ni, Zn) have been prepared by conventional solid state method and investigated through X-ray diffraction, magnetism and optical measurements. All compositions are characterized by a M2+/X6+ honeycomb ordering within the slabs and crystallize in a hexagonal unit cell. However, a structural transition based on a different stacking is observed as nickel (space group P6(3)/mcm) is substituted by zinc or cobalt (space group P6(3)22). All compositions exhibit a paramagnetic Curie-Weiss behavior at high temperatures; and the magnetic moment values confirm the presence of Ni2+ and/or Co2+ cations. The low-temperature antiferromagnetic order of Na2Ni2TeO6 and Na2Co2TeO6 is suppressed by zinc substitution. The color of the obtained compositions varies from pink, to light green and white when M=Co, Ni, Zn, respectively. (C) 2012 Elsevier Inc. All rights reserved.
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