A trigonal–tetragonal phase transition in SrMn2P2is proposed and confirmed experimentally under high pressure. At ambient pressure, SrMn2P2crystallizes in the primitive trigonal La2O3structure type (space groupP3̄m1) in blue. Under high pressure, the tetragonal ThCr2Si2structure type (space groupI4/mmm) in red is more stable.
在高压下,SrMn2P2中存在三方-四方相变,经实验证实。在常压下,SrMn2P2以原始三方La2O3结构类型(空间群P3̄m1)中的蓝色结晶。在高压下,四方ThCr2Si2结构类型(空间群I4/mmm)中的红色更为稳定。