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Title: Structural chemistry and magnetic properties of the hexagonal double perovskite Ba2CoOsO6
Authors: Kayser, P
Orlandi, F
Avdeev, M
Zhang, Z
Kimpton, JA
Kennedy, BJ
Keywords: Perovskites
Multigroup theory
X-ray diffraction
Neutron diffraction
Magnetic properties
Absorption spectroscopy
Issue Date: 14-Apr-2020
Publisher: American Chemical Society
Citation: Kayser, P., Orlandi, F., Avdeev, M., Zhang, Z., Kimpton, J. A., & Kennedy, B. J. (2020). Structural chemistry and magnetic properties of the hexagonal double perovskite Ba2CoOsO6. Inorganic Chemistry, 59(9), 6613-6622. doi:10.1021/acs.inorgchem.0c00761
Abstract: The double perovskite Ba2CoOsO6, synthesized using solid-state methods at ambient pressure, is shown as a rare example of an oxide adopting the 6L-trigonal (S.G.: P3̅m1) perovskite structure. The structure, refined using a combination of X-ray and neutron diffraction data, showed the Co and Os were ordered over the two dimer sites with additional ordering over the corner-sharing sites. Bond valence calculations show the presence of the Co(II) and Os(VI) valence states, and the latter was confirmed using X-ray absorption spectroscopy. Bulk magnetic susceptibility measurements show Ba2CoOsO6 to undergo antiferromagnetic ordering near 100 K, and neutron diffraction showed an ordered moment on the Co3, Co4, and Os2 sites; whereas the Os1/Co1 remained disordered. © 2020 American Chemical Society
ISSN: 1520-510X
Appears in Collections:Journal Articles

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