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A Comparison of the structural role of Na+network modifying cations in sodium silicate and sodium fluoroberyllate glasses

Journal of Non-Crystalline Solids
Publication Date
DOI: 10.1016/s0022-3093(97)00015-x


Abstract Binary glasses in the sodium fluoride beryllium fluoride and soda silica systems have been studied previously using neutron diffraction and, in the present paper, the features in the real space correlation function, corresponding to the first A–X (A=Be, Si; X=F, O) and Na–X interactions are compared for the two systems. The first A–X peak shifts to significantly higher r for Na 2O–SiO 2 but not for NaF–BeF 2 and it is concluded that this is an effect of charge balance. In both cases the Na–X peak is skewed to high r due to the presence of two types of Na–X distance.

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