Valence and delocalization of Yb in the Chevrel-phase YbMo6S8
Open Access
- 1 February 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 27 (3) , 1465-1473
- https://doi.org/10.1103/physrevb.27.1465
Abstract
Mössbauer isomer-shift measurements show that Yb is divalent in Yb . The asymmetry of the Yb thermal vibration at 4.2 K obtained from the Goldanskii-Karyagin effect is much smaller than that obtained from a Rietveld refinement of neutron powder diffraction data at 16 K. This suggests that the displacement of Yb off the origin includes a significant, ∼0.1-Å, static component which persists at low temperature. Full structural refinements at 16, 77, and 295 K show several interesting structural changes versus temperature.
Keywords
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