A well defined, congruently melting stoichiometric system, KSb5S8 (see Figure), with a wide optical energy gap that undergoes rapid reversible crystal–glass transformation is described. The activation energy of crystallization Ec was calculated to be ∼ 167 kJ mol–1. The kinetic parameters and energy bandgaps of KSb5S8 suggest a new inexpensive phase‐change material for possible ultra high density data storage applications.
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Kyratsi et al. (2003) studied this question.
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