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2004
Structure
D 2000
45- 009
Nd2(SeO3)2(SeO4)·2H2O — A Mixed-Valence Compound Containing Selenium in
the Oxidation States +IV and +VI. — Single crystals of the title compound are prepared hydrothermally by reaction of H2SeO3 and Nd2O3 in the presence of Li2CO3 in
10% aq. HNO3 (200 °C, autoclave, 120 h). Nd2(SeO3)2(SeO4)·2H2O crystallizes in the
monoclinic space group C2/c with Z = 4. The structure is an ordered variant of the corresponding erbium compound. The structure contains chains of edge-sharing NdO8
bi-capped trigonal prisms which are connected to layers via SeVIO4 tetrahedra.
Three-dimensional linkage of the layers occurs via the selenite groups. —
(BERDONOSOV, P. S.; SCHMIDT, P.; DITYAT'YEV, O. A.; DOLGIKH, V. A.;
LIGHTFOOT, P.; RUCK*, M.; Z. Anorg. Allg. Chem. 630 (2004) 10, 1395-1400;
Inst. Anorg. Chem., TU Dresden, D-01069 Dresden, Germany; Ger., Abstr. Eng.) —
Schramke
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