ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The crystal structure of (W12.64Mo1.36)O41, containing {102} crystallographic shear (CS) planes, has been solved, a = 23.939 (9), b = 3.966 (1), c = 16.729 (15) Å, β = 106.74 (5)°; P2/c; R = 0.10 for 1285 reflections. It was shown that the Mo atoms segregate on positions in the CS planes. The O atom octahedra are distorted in typical arrangements, so that the elastic strain energy could be estimated. The hypothetical phases (W,Mo)nO3n - 1 for a wide range of values of n were derived from the experimental atomic parameters. Optical and electrical experiments show the existence of two types of charge carriers, a minority in the interplanar material, which contribute to conductivity, and a majority of trapped positions in the CS planes, preferentially on Mo positions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739481001101
