First-order transition in trigonal structure CaMn2P2 Y. J. Li, F. Jin, Z. Y. Mi, J. Guo, W. Wu, Z. H. Yu, D. S. Wu, S. H. Na, C. Mu, X. B. Zhou et al. (7 more) EPL, 132 4 (2020) 46001 Published online: 28 December 2020 DOI: 10.1209/0295-5075/132/46001