Abstract: | High‐Pressure Synthesis of BaSr2P6N12 and BaCa2P6N12 and Comparison of the Structures of BaP2N4, BaCa2P6N12, and BaSr2P6N12 The novel nitridophosphates BaCa2P6N12 and BaSr2P6 N12 were obtained by means of high‐pressure high‐temperature synthesis utilizing the multianvil technique (1200 °C, 5 GPa). The complex anion [PN2?] of the title compound is formally isoelectronic with silica. The crystal structure was solved from powder data and refined by the Rietveld method (BaCa2P6N12: , Z = 4, a = 9,9578(2) Å; BaSr2P6N12: , Z = 4, 10,0705(2) Å). The crystal structures are derived from that of BaP2N4 which is isotypic with a high pressure phase of CaB2O4 and BaGa2S4. For each compound the 31P solid state NMR spectrum yielded a single resonance (BaCa2P6N12: 7.4 ppm; BaSr2P6N12:3.9 ppm). |