Ag3SnCuP10: [Ag3Sn] Tetrahedra Embedded between Adamantane-Type [P10] Cages
- 21 June 2006
- journal article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 45 (15), 5878-5885
- https://doi.org/10.1021/ic060380a
Abstract
Ag3SnCuP10 was synthesized from a stoichiometric mixture of copper, silver, tin, and red phosphorus, with SnI4 added as a mineralization agent. Cubic Ag3SnCuP10, space group F3m (No. 216) with lattice parameter a = 10.503(1) A and Z = 4, consisting of orientationally disordered [Ag3Sn] heteroclusters and adamantane-type [P10] cages, is one example in which structure determination was possible only by the combined use of diffraction and spectroscopic methods. An ideal 4-fold domain twin structure that results for a R3m model, featuring an ordered arrangement of the heteroclusters, cannot be differentiated from the F3m model by diffraction methods alone. After a detailed NMR spectroscopic examination using state of the art solid-state NMR techniques, we found the local environment around the [P10] cages of the F3m model to be the correct description of the Ag3SnCuP10 structure. A possible Cu/Ag or Ag/Sn disorder in the [Ag3Sn] heterocluster and within the copper substructure was excluded by Mössbauer spectroscopic investigations and NMR measurements.This publication has 23 references indexed in Scilit:
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