Sr4 –xCaxRhO6: a magnetically ordered RhIVcompound
- 1 January 1995
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 5 (11) , 1785-1789
- https://doi.org/10.1039/jm9950501785
Abstract
Sr4 –xCaxRhO6(x= 0,1) has been prepared at ambient pressure using the standard techniques of solid-state chemistry. Profile analysis of the X-ray powder diffraction (XRPD) data shows that the rhombohedral product is isostructural with Sr4IrO6. It thus contains RhIV cations in octahedral sites and alkaline-earth-metal cations in trigonal prismatic coordination. The mean Rh—O distance is 2.04 Å. Both of the compositions studied order antiferromagnetically at ca. 7 K. The magnetic susceptibility data have been analysed using both a Curie-Weiss Law (µeff 300 K= 2.03 µB for x= 0) and the one dimensional (1D) Ising model [J/k=- 3.30(1) K for x= 0].Keywords
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