High-pressure synthesis and X-ray powder structure determination of the nitridophosphate BaP2N4

BaP2N4 represents the first alkaline earth nitridophosphate with a molar ratio P:N=1:2. While the PN-network structure is isoelectronic with SiO2 the crystal structure of BaP2N4 is isotypic with that of HP-CaB2O4.