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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
Author(s) -
Herzmann Nina,
Gupta Shalabh,
Corbett John D.
Publication year - 2009
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200801399
Subject(s) - ternary operation , telluride , rare earth , orthorhombic crystal system , transition metal , crystallography , halide , valence (chemistry) , metal , chemistry , cluster (spacecraft) , materials science , inorganic chemistry , mineralogy , crystal structure , biochemistry , organic chemistry , computer science , programming language , catalysis
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, Au. Ten new examples of orthorhombic Er 7 Ni 2 Te 2 ‐type ( Imm 2) have been identified and that for Dy 7 Ir 2 Te 2 has been refined. Seven new examples of 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.