Presents new criteria for elastic stability in noncubic crystal classes, clarifying existing confusion.
While the Born elastic stability criteria are well known for cubic crystals, there is some confusion in the literature about the form they should take for lower-symmetry crystal classes. Here we present closed form necessary and sufficient conditions for elastic stability in all crystal classes, as a concise and pedagogical reference to stability criteria in noncubic materials.
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Mouhat et al. (2014) studied this question.
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