Crystal structure of Fe 2 O(SeO 3 ) 2 , a new oxoselenite compound with ferric iron in distorted tetrahedral coordination

✍ Scribed by Giester, G.

• Book ID: 119965909
• Publisher: Oldenbourg Wissenschaftsverlag
• Year: 1996
• Tongue: English
• Weight: 982 KB
• Volume: 211
• Category: Article
• ISSN: 2194-4946
• DOI: 10.1524/zkri.1996.211.9.603

✦ Synopsis

Abstract

Fe~2~O(SeO~3~)~2~, frequently obtained in various chemical systems by low-hydrothermal treatment of SeO~2~ and FeC~2~O~4~ · 2 H~2~O, has been investigated using single-crystal X-ray diffraction. Crystal data (at room temperature): space group Pccn, a = 6.639(2) Å, b = 12.839(4) Å, c = 13.266(4) Å, V = 1130.8(6) A^3^, Z = 8; R(F) = 0.031, R~w~(F
^2^) = 0.061.

The crystal structure is composed of two crystallographically different types of [FeO~6~] octahedra, a [FeO~4~] tetrahedron and two types of trigonal pyramidal [SeO~3~] groups, which are linked by common edges and corners to a three-dimensional framework. Mean bond lengths are 2.015 Å and 2.027 Å for Fe^[6]^–O, 1.870 Å for Fe^[4]^–O, and 1.703 Å and 1.707 Å for Se(IV)^[3]^–O. The oxo-oxygen is nearly planar-coordinated to three Fe atoms.