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The (100) contact twin of gypsum

机译:石膏的(100)接触双

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摘要

We investigated the structure of the interface between two gypsum crystals forming a (100) contact twin. The athermal twinning and adhesion free energies were calculated using empirical potential functions. By minimizing the twin energy, the optimal interface configuration was obtained and carefully described. The layer expansion and in plane deformation occurring at the twin interface is analyzed in terms of the atomic relaxation displacements. A comparison with previous studies on this twin has been made. A discussion on the formation of the (100) contact twin follows where we show that this twin can be formed by two-dimensional nucleation.
机译:我们研究了形成(100)接触孪晶的两个石膏晶体之间的界面结构。使用经验势函数计算无热孪晶和无粘附能。通过最小化孪晶能量,获得了最佳的界面配置并进行了详细描述。根据原子弛豫位移分析了在双界面处发生的层膨胀和面内变形。与以前对该双胞胎的研究进行了比较。关于(100)接触孪晶的形成的讨论如下,我们表明该孪晶可以通过二维成核形成。

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