In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 36, No. 9R ( 1997-09-01), p. 5605-
Abstract:
Lithium intercalation into FeWO 4 Cl leads to the structural phase transformation from tetragonal to monoclinic. According to Fe K-edge X-ray absorption near edge structure (XANES) spectroscopic analysis, only the Fe 3+ ion in the FeWO 4 Cl lattice is reduced to Fe 2+ with an increment of site symmetry from C 4 v to O h upon lithium intercalation. On the other hand, the white line intensity at the W L-edge XANES becomes slightly enhanced after intercalation, indicating an increase of the (W 6+ –O) bond covalency due to a decrease of the competing (Fe 2+ –O) bond strength. W L 3 -edge extended X-ray absorption fine structure (EXAFS) analyses for FeWO 4 Cl and LiFeWO 4 Cl show that the regular tetrahedron of the WO 4 2- group in FeWO 4 Cl becomes distorted upon lithium intercalation.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.36.5605
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1997
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7