摘要
Recently, a breakthrough has been made on the topological structure of orthopyroxene. The result shows that the space groups of all natural orthopyroxenes are P2<sub>1</sub>ca, instead of the conventionally held Pbca. Moreover, P2<sub>1</sub>ca orthopyroxene is formed when Pbca orthopyroxene is cooled down from a high temperature. LUO et al.
