Rare-earth-rich tellurides: Gd4NiTe2 and Er5M2Te2 (M=Co, Ni) |
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Authors: | Carmela Magliocchi |
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Affiliation: | Department of Chemistry, Texas A&M University, TAMU 3255, P.O. Box 30012, College Station, TX 77842-3012, USA |
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Abstract: | Three new rare earth metal-rich compounds, Gd4NiTe2, and Er5M2Te2 (M=Ni, Co), were synthesized in direct reactions using R, R3M, and R2Te3 (R=Gd, Er; M=Co, Ni) and single-crystal structures were determined. Gd4NiTe2 is orthorhombic and crystallizes in space group Pnma with four formula units per cell. Lattice parameters at 110(2) K are a=15.548(9), b=4.113(2), . Er5Ni2Te2 and Er5Co2Te2 are isostructural and crystallize in the orthorhombic space group Cmcm with two formula units per cell. Lattice parameters at 110(2) K are a=3.934(1), b=14.811(4), , and a=3.898(1), b=14.920(3), , respectively. Metal-metal bonding correlations were analyzed using the empirical Pauling bond order concept. |
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Keywords: | Crystal structure Rare-earth telluride Intermetallic Bonding Chalcogenide |
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