Synthesis and crystal structure of {sigma}-Zn{sub 0.25}V{sub 2}O{sub 5} {center_dot} H{sub 2}O with a novel type of V{sub 2}O{sub 5} layer

Oka, Yoshio; Tamada, Osamu; Yao, Takeshi; Yamamoto, Naoichi

doi:10.1006/jssc.1996.0311

Title: Synthesis and crystal structure of {sigma}-Zn{sub 0.25}V{sub 2}O{sub 5} {center_dot} H{sub 2}O with a novel type of V{sub 2}O{sub 5} layer

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Abstract

A new layered vanadium bronze designated as {sigma}-phase Zn{sub 0.25}V{sub 2}O{sub 5} {center_dot} H{sub 2}O has been hydrothermally synthesized from ZnCl{sub 2} and VO(OH){sub 2}. A single-crystal study revealed the triclinic system P1: a = 10.614(2){angstrom}, b = 8.031(3) {angstrom}, c = 10.7688(9) {angstrom}, {alpha} = 90.65(1){degrees}, {beta} = 91.14(1){degrees}, {gamma} = 90.09(2){degrees}, and Z = 8. The structure was solved and refined to R/R{sub w} = 0.079/0.048 for 1580 reflections with I > 3{sigma}(I), which consists of V{sub 2}O{sub 5} layers stacking along the c axis and interstitial hydrated Zn{sup 2+} ions. Th eV{sub 2}O{sub 5} layer adopts a novel polyhedral framework built up of VO{sub 6} octahedra, VO{sub 5} trigonal bipyramids, and VO{sub 4} tetrahedra. When projected parallel to the ab plane, the V{sub 2}O{sub 5} layer is described by the atomic sheet model in a manner similar to the V{sub 2}O{sub 5} layer of {delta} phase such as {delta}-Ag{sub x}V{sub 2}O{sub 5}, that is, a double-sheet type composed of two V{sub 2}O{sub 5} sheets facing each other. The interstitial Zn atom forms a ZnO{sub 6} octahedron with two apical oxygens of the VO{sub 4} tetrahedra on opposite sides and with four coplanar water molecules. The anhydrous {sigma}more »« less

Authors:

Oka, Yoshio; Tamada, Osamu; Yao, Takeshi; Yamamoto, Naoichi ^[1]

Kyoto Univ. (Japan)

Publication Date:: Tue Oct 01 00:00:00 EDT 1996

OSTI Identifier:: 478920

Resource Type:: Journal Article

Journal Name:: Journal of Solid State Chemistry

Additional Journal Information:: Journal Volume: 126; Journal Issue: 1; Other Information: PBD: Oct 1996

Country of Publication:: United States

Language:: English

Subject:: 40 CHEMISTRY; ZINC OXIDES; CRYSTAL STRUCTURE; VANADIUM OXIDES; HYDRATES; CHEMICAL PREPARATION; TRICLINIC LATTICES; HYDROTHERMAL SYNTHESIS

Citation Formats


                    Oka, Yoshio, Tamada, Osamu, Yao, Takeshi, and Yamamoto, Naoichi. Synthesis and crystal structure of {sigma}-Zn{sub 0.25}V{sub 2}O{sub 5} {center_dot} H{sub 2}O with a novel type of V{sub 2}O{sub 5} layer.  United States: N. p., 1996. 
        Web.  doi:10.1006/jssc.1996.0311.

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                    Oka, Yoshio, Tamada, Osamu, Yao, Takeshi, & Yamamoto, Naoichi. Synthesis and crystal structure of {sigma}-Zn{sub 0.25}V{sub 2}O{sub 5} {center_dot} H{sub 2}O with a novel type of V{sub 2}O{sub 5} layer.  United States.  https://doi.org/10.1006/jssc.1996.0311

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                    Oka, Yoshio, Tamada, Osamu, Yao, Takeshi, and Yamamoto, Naoichi. 1996.  
        "Synthesis and crystal structure of {sigma}-Zn{sub 0.25}V{sub 2}O{sub 5} {center_dot} H{sub 2}O with a novel type of V{sub 2}O{sub 5} layer".  United States.  https://doi.org/10.1006/jssc.1996.0311.

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@article{osti_478920,

  title        = {Synthesis and crystal structure of {sigma}-Zn{sub 0.25}V{sub 2}O{sub 5} {center_dot} H{sub 2}O with a novel type of V{sub 2}O{sub 5} layer},

  author       = {Oka, Yoshio and Tamada, Osamu and Yao, Takeshi and Yamamoto, Naoichi},

  abstractNote = {A new layered vanadium bronze designated as {sigma}-phase Zn{sub 0.25}V{sub 2}O{sub 5} {center_dot} H{sub 2}O has been hydrothermally synthesized from ZnCl{sub 2} and VO(OH){sub 2}. A single-crystal study revealed the triclinic system P1: a = 10.614(2){angstrom}, b = 8.031(3) {angstrom}, c = 10.7688(9) {angstrom}, {alpha} = 90.65(1){degrees}, {beta} = 91.14(1){degrees}, {gamma} = 90.09(2){degrees}, and Z = 8. The structure was solved and refined to R/R{sub w} = 0.079/0.048 for 1580 reflections with I > 3{sigma}(I), which consists of V{sub 2}O{sub 5} layers stacking along the c axis and interstitial hydrated Zn{sup 2+} ions. Th eV{sub 2}O{sub 5} layer adopts a novel polyhedral framework built up of VO{sub 6} octahedra, VO{sub 5} trigonal bipyramids, and VO{sub 4} tetrahedra. When projected parallel to the ab plane, the V{sub 2}O{sub 5} layer is described by the atomic sheet model in a manner similar to the V{sub 2}O{sub 5} layer of {delta} phase such as {delta}-Ag{sub x}V{sub 2}O{sub 5}, that is, a double-sheet type composed of two V{sub 2}O{sub 5} sheets facing each other. The interstitial Zn atom forms a ZnO{sub 6} octahedron with two apical oxygens of the VO{sub 4} tetrahedra on opposite sides and with four coplanar water molecules. The anhydrous {sigma} phase was obtained by heating the hydrate up to 200{degrees}C accompanied by the contraction in layer spacing from 10.76 to 8.92 {angstrom}.},

  doi          = {10.1006/jssc.1996.0311},

  url          = {https://www.osti.gov/biblio/478920},
  journal      = {Journal of Solid State Chemistry},
number       = 1,

  volume       = 126,

  place        = {United States},

  year         = {Tue Oct 01 00:00:00 EDT 1996},

  month        = {Tue Oct 01 00:00:00 EDT 1996}

}

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