Ce2Pt8P: A phosphido-platinide with covalently bonded framework polyanion

Pavel S. Chizhov, Yurii Prots, Evgeny V. Antipov, Yuri Grin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The cerium phosphido-platinide Ce2Pt8P is synthesized by direct reaction of the elements. The crystal structure is considered as an intergrowth of structural segments with the compositions CePt5 (CaCurlike) and CePt3P (CePt3B-like) along [010]. The Pt-Pt and Pt-P distances in the anionic framework are close to the ones found in CePt5 and CePt4P2. Analysis of the chemical bonding in real space reveals the presence of a Pt-P covalently-bonded polyanion [Pt8P] (consisting of PtPt6 trigonal prisms and PPt 5 tetragonal pyramids). Cerium cations are located in the voids of the polyanionic framework. Together with CePt5 (m = 0, n = 1), Ce2Pt8P (m = 1, n = 1) forms a homological series Ce n+mPt5n+3mPm. The hypothetical "CePt 3P" (m = 1, n = 0) with CePt3B-type crystal structure is not known to date.

Original languageEnglish
Pages (from-to)1863-1868
Number of pages6
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Volume635
Issue number12
DOIs
Publication statusPublished - Oct 2009
Externally publishedYes

Keywords

  • Cerium
  • Chemical bonding
  • Intermetallic compounds
  • Phosphorus
  • X-ray diffraction

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