The synthesis, structure and properties of Hg2Os2O7
- 16 January 2002
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 12 (3) , 646-650
- https://doi.org/10.1039/b109715f
Abstract
Hg2Os2O7 has been synthesised by direct reaction of HgO, OsO4 and Os metal at 500°C. The product adopts the pyrochlore structure, in common with Cd2Os2O7, but exhibits a slightly larger lattice parameter at 10.245 Å. The material shows a weak transition to antiferromagnetic behaviour below 88 K; the compound remains semi-metallic through this transition but with a distinct drop in resistivity again centred on 88 K. Powder neutron diffraction data, collected over the temperature range 12 K–298 K, show weak discontinuities in the structural properties at this transition. Comparisons are made with the Cd2Os2O7 and Cd2Re2O7 systems.Keywords
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