[Cd3Cu]CuP10, [Cd3Cu] cluster stabilized in an adamantane-like polyphosphide substructure

Melanie Bawohl, Tom Nilges

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

[Cd3Cu]CuP10 is the first representative of the adamantane-like polyphosphides featuring a metalloid, tetrahedral [M 3X] heterocluster, containing only d10 ions. It was prepared by the mineralization concept for polyphosphides using CuI as the mineralizer species. The title compound crystallizes cubic in the space group F4̄3m (No. 216), with a = 10.479(2) Å and V = 1150.9(4) Å3. It is isostructural to the tin containing coinage-metal polyphosphides [M3Sn]CuP10 with M = Cu, Ag, Au. A perfect orientation disorder of the [Cd3Cu] heterocluster relative to the space diagonals of the cubic cell is present, which is characteristic for the metalloid substructure of this class of compounds. EDX measurements substantiated the refined composition within the standard deviation of the experiment. A slow decomposition of [Cd3Cu]CuP10 was proven by DSC measurements and annealing experiments. The DSC spectra of different samples showed a broad exothermic effect starting at 573 K, which could be identified as a decomposition to new phases. Preliminary results of a single crystal structure determination of the main phase after decomposition pointed towards realized structure units closely related to the title compound, the Cu2P20 and the [Ag3Sn]P7 structure type. A detailed examination of the structural features of this new compound is still in progress.

Original languageEnglish
Pages (from-to)667-673
Number of pages7
JournalZeitschrift fur Anorganische und Allgemeine Chemie
Volume635
Issue number4-5
DOIs
StatePublished - Apr 2009
Externally publishedYes

Keywords

  • Cadmium
  • Copper
  • Metalloid heteroclusters
  • Polyphosphides

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