Synthesis and structure determination of Sm{sub 3}NbSe{sub 3}O{sub 4}
Journal Article
·
· Journal of Solid State Chemistry
- Inst. des Materiaux, Nantes (France). Lab. de Chimie des Solides
Sm{sub 3}NbSe{sub 3}O{sub 4} has been synthesized and its structure determined. The following crystal data were obtained: M{sub r} = 844.84 g{center_dot}mol{sup {minus}1}, orthorhombic, Pnma, a = 6.8943(4) {angstrom}, b = 7.7529(7) {angstrom}, c = 14.7644(12) {angstrom}, V = 789.2(1) {angstrom}{sup 3}, Z = 4, D{sub x} = 7.111 g{center_dot}cm{sup {minus}3}, MoK{alpha}, {lambda} = 0.71073 {angstrom}, {mu} = 372 cm{sup {minus}1}, F(000) = 1444, T = 295 K, R = 0.035 for 1466 unique reflections with F{sub o} > 4{sigma}(F{sub o}), 62 variables, GoF = 0.818. The structure of Sm{sub 3}NbSe{sub 3}O{sub 4} was determined by single-crystal X-ray diffraction. Two distinct types of polyhedra can be distinguished: a very distorted one with eight surrounding atoms (four O and four Se atoms) around Sm1 and Nb, and a bicapped trigonal prismatic one around Sm2. The crystal structure of this new compound can be described on the basis of corrugated planes perpendicular to the c axis. These planes are built up from edge-sharing trigonal prismatic polyhedra (Sm2); connection between successive planes is achieved through the distorted polyhedra which surround atoms Sm1 and Nb.
- OSTI ID:
- 642155
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 137; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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