X-ray absorption spectroscopy examines tungsten's local environment in barium-tungsten-phosphate glasses, suggesting distortion in octahedra.
The XANES and the EXAFS of the L_1- and L_3- edges of tungsten in BaO-P_2O_5-WO_3 glasses and amorphous thin films a-WO_3 were studied using Synchrotron radiation. The sets of distances were obtained in the first and the second coordination spheres of tungsten by a least square technique. It was found, that in all glasses tungsten atoms have strongly distorted oxygen octahedra, which are joined by vertices.
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A. et al. (1991) studied this question.
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