Synthesis, structure, and electrical resistivity of Cs 3U 18Se 38

George N. Oh; James A Ibers

doi:10.1016/j.jssc.2012.02.035

Synthesis, structure, and electrical resistivity of Cs ₃U ₁₈Se ₃₈

George N. Oh, James A Ibers^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article

2 Scopus citations

Abstract

Cs ₃U ₁₈Se ₃₈ was synthesized by the solid-state reactions of U, Se, CsCl or Cs ₂Se ₃, and P or As at 1273 K. This compound crystallizes in a new structure in the tetragonal space group D ¹⁸ _4h-I4/mcm. The asymmetric unit contains U atoms in four different coordination environments. The overall three-dimensional network structure contains channels along the c axis, in which the Cs atoms lie. The formula Cs ₃U ₁₈Se ₃₈ does not charge balance with the typical formal oxidation states of the elements. Electrical resistivity measurements conducted on a single crystal reveal a broad feature at 225 K, atypical semiconductor behavior below 57 K, and a calculated band gap of 0.0030(1) eV.

Original language	English (US)
Pages (from-to)	81-86
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	192
DOIs	https://doi.org/10.1016/j.jssc.2012.02.035
State	Published - Aug 1 2012

Keywords

Cesium uranium selenide
Charge balance
Single-crystal X-ray structure
Single-crystal electrical resistivity

ASJC Scopus subject areas

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

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Oh, G. N., & Ibers, J. A. (2012). Synthesis, structure, and electrical resistivity of Cs ₃U ₁₈Se ₃₈ Journal of Solid State Chemistry, 192, 81-86. https://doi.org/10.1016/j.jssc.2012.02.035

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title = "Synthesis, structure, and electrical resistivity of Cs 3U 18Se 38 ",

abstract = "Cs 3U 18Se 38 was synthesized by the solid-state reactions of U, Se, CsCl or Cs 2Se 3, and P or As at 1273 K. This compound crystallizes in a new structure in the tetragonal space group D 18 4h-I4/mcm. The asymmetric unit contains U atoms in four different coordination environments. The overall three-dimensional network structure contains channels along the c axis, in which the Cs atoms lie. The formula Cs 3U 18Se 38 does not charge balance with the typical formal oxidation states of the elements. Electrical resistivity measurements conducted on a single crystal reveal a broad feature at 225 K, atypical semiconductor behavior below 57 K, and a calculated band gap of 0.0030(1) eV.",

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AB - Cs 3U 18Se 38 was synthesized by the solid-state reactions of U, Se, CsCl or Cs 2Se 3, and P or As at 1273 K. This compound crystallizes in a new structure in the tetragonal space group D 18 4h-I4/mcm. The asymmetric unit contains U atoms in four different coordination environments. The overall three-dimensional network structure contains channels along the c axis, in which the Cs atoms lie. The formula Cs 3U 18Se 38 does not charge balance with the typical formal oxidation states of the elements. Electrical resistivity measurements conducted on a single crystal reveal a broad feature at 225 K, atypical semiconductor behavior below 57 K, and a calculated band gap of 0.0030(1) eV.

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KW - Single-crystal electrical resistivity

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