“…Examples include the high- T c superconductor P 6 3 / mmc CeH 9 with H 29 cages, 39 LaCeH 20 featuring H 32 cages, 40 the high-energy-density material CeN 6 comprising N 14 rings, 41 and the hard material CeB 12 with truncated octahedral B 24 structures. 42 As anticipated, our research has unveiled Pmma Ce 2 P 3 and P 6/ mmm CeP 2 , both featuring fascinating planar P layers. Remarkably, these compounds exhibit superconductivity, with CeP 2 demonstrating a T c of 30.77 K at ambient pressure (0 GPa).…”