A systematic typology for negative Poisson's ratio materials and the prediction of complete auxeticity in pure silica zeolite JST

作者：Siddorn M; Coudert F X; Evans K E; Marmier A^*

来源：Physical Chemistry Chemical Physics, 2015, 17(27): 17927-17933.

DOI：10.1039/c5cp01168j

Single crystals can commonly have negative Poisson's ratio in a few directions; however more generalised auxeticity is rarer. We propose a typology to distinguish auxetic materials. We characterise numerous single crystals and demonstrate that partial auxeticity occurs for around 37%. We find average auxeticity to be limited to alpha-cristobalite and no example of complete auxeticity. We simulate two hundreds pure silica zeolites with empirical potentials and quantum chemistry methods, and for the first time identify complete auxeticity in a zeolite network, JST.

• 出版日期2015