Crystal Data for Mixed-Anion Molybdenum Dichalcogenides

Lynn F. Schneemeyer; M. J. Sienko

doi:10.1021/ic50205a047

Crystal Data for Mixed-Anion Molybdenum Dichalcogenides

Lynn F. Schneemeyer, M. J. Sienko

Chemistry and Biochemistry

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Abstract

The layered dichalcogenides¹ MoS₂ and MoSe₂ are of special interest as lubricants, ² catalysts, and catalyst supports for hydrodesulfurization reactions, ³ precursors of intercalation superconductors, ⁴ and possible electrodes for photoelectrolysis.⁵ In the pure, stoichiometric state they are moderate-gap semiconductors (1.75 eV for MoS₂ and 1.4 eV for MoSe₂), ⁵ presumably because the characteristic trigonal splitting of the d orbitals leads to filled d subbands. As part of a larger study on how small changes in chemical parameters affect superconductivity, we have had occasion to prepare the full solid solution series MoS_2-xSe_x (0 < × < 2). The end compounds form both 2H and 3R polytypes. In each case, molybdenum atoms occupy trigonal-prismatic sites within the layers. In addition, in the system MoS_2-xSe_x, a continuous series of solid solutions can be prepared, all having the same 2H two-layer hexagonal structure (space group P6₃/mmc). We report in this communication the evolution of lattice parameters of the mixed-anion system.

Original language	English
Pages (from-to)	789-791
Number of pages	3
Journal	Inorganic Chemistry
Volume	19
Issue number	3
DOIs	https://doi.org/10.1021/ic50205a047
State	Published - 1 Jan 1980

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title = "Crystal Data for Mixed-Anion Molybdenum Dichalcogenides",

abstract = "The layered dichalcogenides1 MoS2 and MoSe2 are of special interest as lubricants, 2 catalysts, and catalyst supports for hydrodesulfurization reactions, 3 precursors of intercalation superconductors, 4 and possible electrodes for photoelectrolysis.5 In the pure, stoichiometric state they are moderate-gap semiconductors (1.75 eV for MoS2 and 1.4 eV for MoSe2), 5 presumably because the characteristic trigonal splitting of the d orbitals leads to filled d subbands. As part of a larger study on how small changes in chemical parameters affect superconductivity, we have had occasion to prepare the full solid solution series MoS2-xSex (0 < × < 2). The end compounds form both 2H and 3R polytypes. In each case, molybdenum atoms occupy trigonal-prismatic sites within the layers. In addition, in the system MoS2-xSex, a continuous series of solid solutions can be prepared, all having the same 2H two-layer hexagonal structure (space group P63/mmc). We report in this communication the evolution of lattice parameters of the mixed-anion system.",

author = "Schneemeyer, {Lynn F.} and Sienko, {M. J.}",

year = "1980",

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doi = "10.1021/ic50205a047",

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T1 - Crystal Data for Mixed-Anion Molybdenum Dichalcogenides

AU - Schneemeyer, Lynn F.

AU - Sienko, M. J.

PY - 1980/1/1

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N2 - The layered dichalcogenides1 MoS2 and MoSe2 are of special interest as lubricants, 2 catalysts, and catalyst supports for hydrodesulfurization reactions, 3 precursors of intercalation superconductors, 4 and possible electrodes for photoelectrolysis.5 In the pure, stoichiometric state they are moderate-gap semiconductors (1.75 eV for MoS2 and 1.4 eV for MoSe2), 5 presumably because the characteristic trigonal splitting of the d orbitals leads to filled d subbands. As part of a larger study on how small changes in chemical parameters affect superconductivity, we have had occasion to prepare the full solid solution series MoS2-xSex (0 < × < 2). The end compounds form both 2H and 3R polytypes. In each case, molybdenum atoms occupy trigonal-prismatic sites within the layers. In addition, in the system MoS2-xSex, a continuous series of solid solutions can be prepared, all having the same 2H two-layer hexagonal structure (space group P63/mmc). We report in this communication the evolution of lattice parameters of the mixed-anion system.

AB - The layered dichalcogenides1 MoS2 and MoSe2 are of special interest as lubricants, 2 catalysts, and catalyst supports for hydrodesulfurization reactions, 3 precursors of intercalation superconductors, 4 and possible electrodes for photoelectrolysis.5 In the pure, stoichiometric state they are moderate-gap semiconductors (1.75 eV for MoS2 and 1.4 eV for MoSe2), 5 presumably because the characteristic trigonal splitting of the d orbitals leads to filled d subbands. As part of a larger study on how small changes in chemical parameters affect superconductivity, we have had occasion to prepare the full solid solution series MoS2-xSex (0 < × < 2). The end compounds form both 2H and 3R polytypes. In each case, molybdenum atoms occupy trigonal-prismatic sites within the layers. In addition, in the system MoS2-xSex, a continuous series of solid solutions can be prepared, all having the same 2H two-layer hexagonal structure (space group P63/mmc). We report in this communication the evolution of lattice parameters of the mixed-anion system.

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Crystal Data for Mixed-Anion Molybdenum Dichalcogenides

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