The crystal structure of Li0.2ReO3 has been determined and that of Li0.36WO3 redetermined by neutron diffraction powder profile analysis. The compounds are formed by the ambient temperature reactions of n-BuLi with WO3 and LiI with ReO3. The insertion of Li in both cases distorts the vacant perovskite-like cavities of the MO3 hosts by inducing a movement of the oxygen atoms of about 0.4 Å. The resultant cavities are partially occupied by Li in square planar coordination, with lithium-oxygen distances of about 2.2 Å. Up to 0.75 Li/host metal could be accommodated in interstitial sites of that type, but in both cases the cubic phase becomes unstable before that extent of insertion can be attained. The results of Li0.36WO3 are in agreement with those of an earlier study.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry