Abstract
From the compositional dependences of the lattice parameters in the system Cr , a critical V-V separation =2.90±0.01 Å has been determined for an array of octahedral-site ions sharing common octahedral-site edges with six like nearest neighbors. A first-order transition on passing from the itinerant-electron regime R< to the localized-electron regime R> was also established. In , the electron instability associated with an R≈ is manifest by trimer formation at temperatures T<490 K with R< within a trimer and R> between trimers. Introduction of a mixed valence in results in a two-phase mixture in the interval 0
- Received 15 November 1990
DOI:https://doi.org/10.1103/PhysRevB.43.10170
©1991 American Physical Society