# chem: oddities under pressure

<< When [AA] placed the material inside a gas chamber and cranked up the air pressure from one bar (about the atmospheric pressure at sea level) to five bars, the cube’s volume increased by about 3 percent >>

Maria Temming. This material does weird things under pressure. Microcube is designed so that pressure makes it expand instead of compress. Science News. 2017; 192 (11): 12. Dec 23, 2017.

https://www.sciencenews.org/article/material-does-weird-things-under-pressure 

Jingyuan Qu, Alexander Gerber, et al. Experiments on Metamaterials with Negative Effective Static Compressibility. Phys. Rev. 2017; X7, 041060. Dec 8, 2017

https://journals.aps.org/prx/abstract/10.1103/PhysRevX.7.041060