TY - JOUR
T1 - Dicobalt (II) hydroxo-selenite
T2 - Hydrothermal synthesis, crystal structure and magnetic properties of Co2SeO3(OH)2
AU - Zhong, Ruidan
AU - Guo, Shu
AU - Ni, Danrui
AU - Cava, R. J.
N1 - Funding Information:
The materials synthesis and magnetic characterization were supported by the Gordon and Betty Moore Emergent Phenomena in Quantum System (EPiQS) Program , Grant GBMF-4412 . The crystal structure determination was supported by the US Department of Energy, Office of Science , Emergent Frontier Research Center (EFRC) Grant DE-SC0019331 .
Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2020/5
Y1 - 2020/5
N2 - A previously unreported dicobalt hydroxo-selenite Co2SeO3(OH)2 was synthesized under mild hydrothermal conditions. Its crystal structure, determined by single-crystal X-ray diffraction at ambient temperature, is monoclinic, space group P21/n, with unit cell parameters a = 7.716 Å, b = 5.823 Å, c = 9.556 Å, β = 97.38°, and Z = 4. Bond valence sums indicate that the cations have the oxidation states Co(II) and Se(IV), and allow us to locate the hydrogens in the structure. Chains of edge-sharing CoO6 octahedra extending along [010] are connected by pairs of edge sharing CoO6 octahedra, forming a two-dimensional Co-based magnetic plane. These magnetic planes are connected by two SeO3 2− pyramids. The magnetic properties of the Co2+ ions are dominated by antiferromagnetic interactions, evident by the negative Curie-Weiss temperature of −97.6 K. Long-range ordered antiferromagnetic ordering is observed below a transition temperature at 65 K.
AB - A previously unreported dicobalt hydroxo-selenite Co2SeO3(OH)2 was synthesized under mild hydrothermal conditions. Its crystal structure, determined by single-crystal X-ray diffraction at ambient temperature, is monoclinic, space group P21/n, with unit cell parameters a = 7.716 Å, b = 5.823 Å, c = 9.556 Å, β = 97.38°, and Z = 4. Bond valence sums indicate that the cations have the oxidation states Co(II) and Se(IV), and allow us to locate the hydrogens in the structure. Chains of edge-sharing CoO6 octahedra extending along [010] are connected by pairs of edge sharing CoO6 octahedra, forming a two-dimensional Co-based magnetic plane. These magnetic planes are connected by two SeO3 2− pyramids. The magnetic properties of the Co2+ ions are dominated by antiferromagnetic interactions, evident by the negative Curie-Weiss temperature of −97.6 K. Long-range ordered antiferromagnetic ordering is observed below a transition temperature at 65 K.
KW - Crystal structure
KW - Hydrothermal synthesis
KW - Hydroxo-selenite
KW - Magnetic properties
KW - Single crystal X-ray diffraction
KW - Transition metal
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U2 - 10.1016/j.jssc.2020.121250
DO - 10.1016/j.jssc.2020.121250
M3 - Article
AN - SCOPUS:85079327621
SN - 0022-4596
VL - 285
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
M1 - 121250
ER -