The crystal structures of Ba2LaRuO6 and Ca2LaRuO6 |
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Authors: | PD Battle |
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Affiliation: | Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR UK |
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Abstract: | Neutron diffraction experiments have been performed to determine the structures of Ba2LaRuO6 and Ca2LaRuO6. Both are ordered, distorted perovskites. Ba2LaRuO6 is monoclinic, space group with , , , β=90.44(1)o. The A sites are occupied by barium and the B sites by an ordered arrangement of lanthanum and ruthenium. Ca2LaRuO6 is triclinic, space group P1 with a0=5.6179(5), b0=5.8350(5), c0=8.0667(4), α=90.0o, β=89.76(1)o, γ=90.0o. The A sites are occupied by calcium and lanthanum in a disordered manner, and the B sites are occupied by an ordered arrangement of calcium and ruthenium. The results reported in this paper thus contradict those of previous workers. The low-temperature magnetic structures are discussed briefly. |
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