Crystal Data for Mixed-Anion Molybdenum Dichalcogenides

Lynn Schneemeyer, M. J. Sienko

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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 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.

Original languageEnglish
Pages (from-to)789-791
Number of pages3
JournalInorganic Chemistry
Volume19
Issue number3
DOIs
StatePublished - 1 Jan 1980

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Molybdenum
molybdenum
Anions
Solid solutions
solid solutions
anions
catalysts
Crystals
Hydrodesulfurization
lubricants
Intercalation
Superconductivity
Catalyst supports
intercalation
Superconducting materials
Lattice constants
crystals
Lubricants
lattice parameters
superconductivity

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Schneemeyer, Lynn ; Sienko, M. J. / Crystal Data for Mixed-Anion Molybdenum Dichalcogenides. In: Inorganic Chemistry. 1980 ; Vol. 19, No. 3. pp. 789-791.
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Crystal Data for Mixed-Anion Molybdenum Dichalcogenides. / Schneemeyer, Lynn; Sienko, M. J.

In: Inorganic Chemistry, Vol. 19, No. 3, 01.01.1980, p. 789-791.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Schneemeyer, Lynn

AU - Sienko, M. J.

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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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