Structural analysis of molten K2SO4
- 1 January 1979
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 75, 1169-1178
- https://doi.org/10.1039/f19797501169
Abstract
The structure of molten K2SO4 has been investigated using the radial distribution function together with the correlation method based on X-ray scattering intensity data collected at ≈ 1150°C. The SO4 tetrahedron which exists in the crystalline state of K2SO4 is shown to be preserved in the molten state. The most likely model for the short-range arrangement is that of four near-neighbour potassium atoms situated around the SO4 tetrahedron. One of the four potassium atoms practically occupies the corner-site and the others occupy the edge-sites. The nearest-neighbour K–O and K–S distance are r= 2.80 and 3.38 Å, respectively. The most likely model for the long-range arrangement is about thirteen K2SO4 units situated around one K2SO4 unit with an average inter-unit distance of 7.0 Å.Keywords
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