The Crystal Structure of Bismuth Oxide Fluoride. II. A Refinement of the Previously Published Structure.

Experimental versus expected halide-ion size differences; structural changes in three series of isotypic bismuth chalcogenide halides

“…The initial aim of that work was to obtain reliable size differences for the halide ions to be used in a study of the structural changes within three series of bismuth chalcogenide halide compounds. The compounds in question are the isotypic series KBi 6 O 9 X (X = Cl, Br and I; Eggenweiler et al, 1998), BiOX (X = F, Cl, Br and I; Aurivillius, 1964;Soubeyroux et al, 1984;Keramidas et al, 1993;Ketterer & Krä mer, 1986;Keller & Krä mer, 2005), and BiSX (X = Cl, Br and I; Voutsas & Rentzeperis, 1980Haase-Wessel, 1973). The KBi 6 O 9 X structure (space group I43d ) consists of a 3 1…”

The crystal structure of Bi12O15Cl6

“…The lone pair of electrons can be imagined to complete a square pyramid. This coordination polyhedron of Bi was found earlier in BiOCI (Bannister & Hey, 1935) and BiOF (Aurivillius, 1964). Bi (12) is, on the other hand, surrounded by five O atoms all on one side (Fig.…”

“…The values are normal compared to the structures of BiOCl (Aurivillius, 1964;Sill6n, 1940) and Bi607FCIa (Hopfgarten, 1975). The coordination of Bi can be described in the following way.…”

“…Interatomic distances (~) in Bi120~sCI6 compared with the corresponding distances in BiOCI (Aurivillius, 1964) and Bi6OTFCI3 (Hopfgarten, 1975 (9) Bi (12) (12) is coordinated to five oxygens. Including the lone electron pair of Bi, the coordination polyhedra can be described as square pyramids and as octahedra.…”

Coherent view of crystal chemistry and ab initio analyses of Pb(II) and Bi(III) lone pair in square planar coordination

“…Here Figure 4 BiOF crystal structure x-ray determination has been performed on synthetic single crystals [10]. Later on, neutron diffraction studies allowed better definition of crystal network [11].…”