Dicobalt (II) hydroxo-selenite: Hydrothermal synthesis, crystal structure and magnetic properties of Co2SeO3(OH)2

Ruidan Zhong; Shu Guo; Danrui Ni; R. J. Cava

doi:10.1016/j.jssc.2020.121250

Dicobalt (II) hydroxo-selenite: Hydrothermal synthesis, crystal structure and magnetic properties of Co₂SeO₃(OH)₂

Ruidan Zhong, Shu Guo, Danrui Ni, R. J. Cava

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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.

Original language	English (US)
Article number	121250
Journal	Journal of Solid State Chemistry
Volume	285
DOIs	https://doi.org/10.1016/j.jssc.2020.121250
State	Published - May 2020

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Keywords

Crystal structure
Hydrothermal synthesis
Hydroxo-selenite
Magnetic properties
Single crystal X-ray diffraction
Transition metal

Access to Document

10.1016/j.jssc.2020.121250

Cite this

@article{cab9bee808394b44b1fd6d7352714551,

title = "Dicobalt (II) hydroxo-selenite: Hydrothermal synthesis, crystal structure and magnetic properties of Co2SeO3(OH)2",

abstract = "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 {\AA}, b = 5.823 {\AA}, c = 9.556 {\AA}, 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.",

keywords = "Crystal structure, Hydrothermal synthesis, Hydroxo-selenite, Magnetic properties, Single crystal X-ray diffraction, Transition metal",

author = "Ruidan Zhong and Shu Guo and Danrui Ni and Cava, {R. J.}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Inc.",

year = "2020",

month = may,

doi = "10.1016/j.jssc.2020.121250",

language = "English (US)",

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journal = "Journal of Solid State Chemistry",

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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.

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.

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KW - Hydrothermal synthesis

KW - Hydroxo-selenite

KW - Magnetic properties

KW - Single crystal X-ray diffraction

KW - Transition metal

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