Chemical bonding and electronic properties in antimony chalcogenides

121Sb Mössbauer Study of Sb2S3–As2S3–Tl2S Glasses

“…These antimony(III) chalcogenides are characterized by a 5s nonbonding electrons. The Sb(III) atoms characteristically show very irregular coordination in their crystalline complexes (12).…”

“…1: the pyramidal SbS E type, the triangle-based bipyramidal SbS E type, and the square-based pyramidal SbS E types. The stereochemical activity of the nonbonding electrons decreases with increasing coordination number (12).…”

Synthesis and Crystal Structure of a New Quaternary Chalcoantimonide: KLa2Sb3S9and KSm2Sb3Se8

“…[1][2][3] Rich structural variations in these compounds are derived from the stereochemically active Sb lone pair electrons. 4 Along with the coordinate character of Sb, it is expected that the addition of large electropositive cations such as lanthanides into [Sb x Q y ] n− building blocks leads to new compounds with a more complex structure. Especially, rare-earth elements may cause unique metal-chalcogen bonding characters due to their large size and high coordination numbers.…”

“…9 The Sb(1)Se 6 , Sb(2)Se 6 and Sb(3)Se 6 octahedra were alternatively located by sharing Se atoms in the basal planes to form a rectangular-shaped tunnel running along the b-axis (Figure 3). This kind of fragment is prevalent in M 2 Q 3 (M=As, Sb, Bi; Q=S, Se, Te) 17 and also found in Cs 2 Sb 4 Se 8 18 and K 2 (RE) 2-x Sb 4+x Se 12 (RE=La, Ce, Pr, Gd).…”

Synthesis and Crystal Structure of Penthylenediammonium pentabromobismutate(III) [NH3(CH2)5NH3]BiBr5

“…The LEP is responsible for the deformation of the octahedron coordination of Bi(III). 5,6 In our case, the lone electron pair of Bi(III) points in for opposite direction to the Br3 atoms. The orientation of octahedral chains indicates that these LEP point in [011] direction.…”