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Reduced Ternary Rare-Earth-Transition Metal Tellurides for the Smaller Rare-Earth Elements. An Exploration and an Explanation of the Marked Stability Differentiation among the Rare-Earth Elements in These Phases

TitleReduced Ternary Rare-Earth-Transition Metal Tellurides for the Smaller Rare-Earth Elements. An Exploration and an Explanation of the Marked Stability Differentiation among the Rare-Earth Elements in These Phases
Publication TypeJournal Article
Year of Publication2009
AuthorsHerzmann N, Gupta S, Corbett JD
Journal TitleZeitschrift Fur Anorganische Und Allgemeine Chemie
Volume635
Pages848-854
ISBN Number0044-2313
Accession NumberISI:000266556900008
Keywordschalcogenides, clusters, co, fe, halides, metal interstitials, mn, ni, os, phase stabilities, rare earth compounds, ru, solid-state reactions, stability trends, yttrium
Abstract

The existence of further metal-rich condensed cluster compounds in R-Z-Te systems has been synthetically explored for R = Sc, Y, Pr, Dy, Er, Tm, Yb, Lu and, mainly, Z = Ru, Rh, Pd, Ag, Ir, Pt, An. Ten new examples of orthorhombic Er7Ni2Te-type (Imm2) have been identified and that for Dy7Ir2Te2, has been refined. Seven new examples or other ternary structure types plus X-ray powder pattern evidence for 14 unknown phases have also been identified. To date the family of ternary R-Z-Te phases appears to be limited to those for R = Sc, Y. and Dy-Lu, a trend that is parallel to but more emphatic than those variations found among parallel cluster halide systems. Stability trends among the halide and especially the telluride series follow the I1 + I2 sums for the R elements well, the larger values of which are considered to reflect better mixing of R and Z valence d orbitals in the more stable phases.
URL<Go to ISI>://000266556900008
DOI10.1002/Zaac.200801399