Elasticity of agr-Cristobalite: A Silicon Dioxide with a Negative Poisson's Ratio Export

@article{citeulike:3815784, abstract = {Laser Brillouin spectroscopy was used to determine the adiabatic single-crystal elastic stiffness coefficients of silicon dioxide (SiO2) in the [agr]-cristobalite structure. This SiO2 polymorph, unlike other silicas and silicates, exhibits a negative Poisson's ratio; [agr]-cristobalite contracts laterally when compressed and expands laterally when stretched. Tensorial analysis of the elastic coefficients shows that Poisson's ratio reaches a maximum value of -0.5 in some directions, whereas averaged values for the single-phased aggregate yield a Poisson's ratio of -0.16. 10.1126/science.257.5070.650}, author = {Yeganeh-Haeri, Amir and Weidner, Donald J. and Parise, John B.}, citeulike-article-id = {3815784}, citeulike-linkout-0 = {http://dx.doi.org/10.1126/science.257.5070.650}, citeulike-linkout-1 = {http://www.sciencemag.org/cgi/content/abstract/257/5070/650}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/17740733}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=17740733}, day = {31}, doi = {10.1126/science.257.5070.650}, journal = {Science}, keywords = {cristobalite, poisson}, month = {July}, number = {5070}, pages = {650--652}, posted-at = {2008-12-21 15:20:39}, priority = {2}, title = {Elasticity of agr-Cristobalite: A Silicon Dioxide with a Negative Poisson's Ratio}, url = {http://dx.doi.org/10.1126/science.257.5070.650}, volume = {257}, year = {1992} }

TY - JOUR ID - citeulike:3815784 L3 - citeulike-article-id:3815784 N2 - Laser Brillouin spectroscopy was used to determine the adiabatic single-crystal elastic stiffness coefficients of silicon dioxide (SiO2) in the [agr]-cristobalite structure. This SiO2 polymorph, unlike other silicas and silicates, exhibits a negative Poisson's ratio; [agr]-cristobalite contracts laterally when compressed and expands laterally when stretched. Tensorial analysis of the elastic coefficients shows that Poisson's ratio reaches a maximum value of -0.5 in some directions, whereas averaged values for the single-phased aggregate yield a Poisson's ratio of -0.16. 10.1126/science.257.5070.650 IS - 5070 JF - Science EP - 652 TI - Elasticity of agr-Cristobalite: A Silicon Dioxide with a Negative Poisson's Ratio VL - 257 SP - 650 KW - cristobalite KW - poisson AU - Yeganeh-Haeri, Amir AU - Weidner, Donald AU - Parise, John PY - 1992/07/31/ UR - http://dx.doi.org/10.1126/science.257.5070.650 ER -