Abstract
The temperature-dependent electron diffraction study has been made of Cu ion ordering in the vanadium oxide bronze Cu2.33-xV4O11. Evidence is thereby found (at low temperature) for two distinct incommensurate modulations associated with the three-dimensional ordering of Cu ions in each of two distinct channel types which run along b between the V4O11 layers of the average structure. The primary modulation wave-vector associated with the first modulation q1= 1/2 c* is associated with Cu ion ordering and associated structural relaxation in the first type of tunnel while the second type of modulation (characterized by the primary modulation wave-vector q2=±1/2a* +~0.16b*) is presumed to be associated with Cu ion ordering in the remaining, or thetrahedral, tunnel type. This second modulation only appears to condense out at low temperature.
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science
Cited by
9 articles.
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