X-ray high temperature powder diffraction study and computer simulation of gamma-LiNaCO3статья
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Дата последнего поиска статьи во внешних источниках: 9 ноября 2013 г.
Аннотация:The high-temperature gamma-phase of lithium sodium carbonate (gamma-LiNaCO3, a = 8.311 Angstrom, c = 3.386 Angstrom, P (6) over bar) has been studied by X-ray diffraction and computer simulation methods. The results of computer simulation based on the ionic model and the temperature dependence of the superlattice reflection intensities correspond to the order-disorder type of the beta-gamma phase transition. The Rietveld refinement using X-ray powder data at 713 K confirms the disordered model of the structure with one of the three CO32- groups disordered over two sets of positions.