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Mg 4.85 Rh 6 Si 13 , a Magnesium Rhodium Silicide with Silicon Clusters Si 4 and Si 18
Author(s) -
Kessens Heike,
Schnelle Walter,
Jung Walter
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400105
Subject(s) - silicide , tantalum , crystallography , rhodium , silicon , materials science , crystal structure , magnesium , tetrahedron , single crystal , barium , electrical resistivity and conductivity , chemistry , metallurgy , physics , biochemistry , quantum mechanics , catalysis
Abstract Mg 4.85 Rh 6 Si 13 was obtained from a mixture of the elements in an alumina crucible enclosed in a tantalum ampoule at 950 °C. The crystal structure was solved and refined from single crystal diffraction data [space group P 6 3 / mmc ; a = 8.709(1) Å, c = 22.240(1) Å]. The new structure type displays a three‐dimensional [Rh 6 Si 13 ] framework, which contains Si 4 tetrahedra and Mg 2 @Si 18 polyhedra consisting of two magnesium centered truncated tetrahedra connected by a hexagonal face. The compound is a Pauli‐paramagnetic metal with a high electrical resistivity.