Abstract
An X-ray diffraction study has been carried out on binary phosphate and silicate glasses with MgO or CaO in equimolar composition. The structure of a 60 mol% CaO–40 mol% Al2O3 glass was also investigated for comparison. The electron radial distribution function was calculated by the usual Fourier transformation and interpretation of it was made in terms of pair functions. The number of oxygens around magnesium is evaluated to be four in both phosphate and silicate glasses. On the other hand, the number of oxygens which surround calcium appears to depend upon the component of network formers: namely, the oxygen coordination numbers around calcium are five in phosphate, six in silicate and four in aluminate glasses, respectively.
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Matsubara, E., Kawazoe, T., Waseda, Y. et al. Oxygen coordination of magnesium and calcium in binary magnesia and calcia metaphosphate glasses. J Mater Sci 23, 547–550 (1988). https://doi.org/10.1007/BF01174683
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DOI: https://doi.org/10.1007/BF01174683