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High-pressure synthesis and crystal structures of two new polyphosphides, NaP5 and CeP5 |
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| Authors: | Xuean Chen Shoji Yamanaka |
| Affiliation: | a College of Materials Science and Engineering, Beijing University of Technology, 100 Ping Le Yuan, Chaoyang District, Beijing 100022, PR China b Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan |
| Abstract: | Two novel polyphosphides, NaP5 and CeP5, were prepared in a BN crucible by the reaction of elemental components under a high pressure of 3 GPa at 800–950 °C. The X-ray structural analysis showed that NaP5 crystallizes in an orthorhombic space group Pnma with a=10.993(2) Å, b=6.524(1) Å, c=6.903(1) Å, Z=4 and CeP5 in the monoclinic group P21/m with a=4.9143(5) Å, b=9.6226(8) Å, c=5.5152(4) Å, β=104.303(6)°, Z=2. The crystal structure of NaP5 consists of a three-dimensional framework ∞3P5]1? constructed by P---P bonds among four crystallographically inequivalent phosphorus sites, with large channels hosting the sodium cations, while CeP5 is a layered compound containing ∞2P5]3? polyanionic layers that are separated by Ce3+ ions. NaP5 exhibits the diamagnetic behavior, while the temperature-dependent magnetic susceptibility of CeP5 essentially follows the Curie–Weiss law. |
| Keywords: | Author Keywords: Zintl phases Crystal growth Crystal structure and symmetry Strain high pressure |
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