5 years ago

A(II)GeTeO6 (A = Mn, Cd, Pb): Non-Centrosymmetric Layered Tellurates with PbSb2O6-Related Structure

A(II)GeTeO6 (A = Mn, Cd, Pb): Non-Centrosymmetric Layered Tellurates with PbSb2O6-Related Structure
Martha Greenblatt, Haricharan Padmanabhan, Venkatraman Gopalan, Sun Woo Kim, Changqing Jin, Shuang Yu, Weiguo Zhang, Zheng Deng
A(II)GeTeO6 (A = Mn, Cd, Pb) exhibit non-centrosymmetric two-dimensional honeycomb structure of PbSb2O6-type. The ordering of Ge4+ and Te6+ in octahedral environment breaks the inversion symmetry of parent PbSb2O6 structure. The size of A(II) cation in octahedral six coordination is an important factor to stabilize the PbSb2O6-type structure. Temperature-dependent SHG of A(II)GeTeO6 confirmed non-centrosymmetric character. Magnetic measurements of MnGeTeO6 indicate anti-ferromagnetic order at TN ≈ 9.4 K with a Weiss temperature of −22.47 K.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b01013

DOI: 10.1021/acs.inorgchem.7b01013

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