%0 Journal Article
%T Single Crystals of the Isotypic Series BaLu2Ch4 (Ch = S, Se and Te) with CaFe2O4-Type Structure
%A Christian M. Schurz
%A Thomas Schleid
%J Crystals
%D 2011
%I MDPI AG
%R 10.3390/cryst1030078
%X Single crystals of ternary chalcogenides with the composition BaLu 2 Ch 4 ( Ch = S, Se and Te; orthorhombic, Pnma; a = 1211.4每1353.6, b = 395.6每438.5, c = 1427.8每1593.6 pm) could be obtained after attempts to synthesize ternary lutetium(III) nitride chalcogenides using the elements (Lu and Ch) along with BaN 3Cl as a nitrogen source. Their crystal structures are isotypic with CaFe 2O 4 containing two sorts of {[Lu Ch Ch] 8每} chains built up of edge-linked [(Lu1)( Ch2)( Ch3) 3( Ch4) 2] 9每 and [(Lu2)( Ch1) 3( Ch2) 2( Ch4)] 9每 octahedra, respectively. A further interconnection via the chalcogenide anions ( Ch3) 2每 and ( Ch1) 2每 leads to double chains, where either (Lu1) 3+ or (Lu2) 3+ coordinates these chalcogenide anions as well. The three-dimensional framework {[Lu 2 Ch 4] 2每} emerges from the corner-linkage of the two kinds of double chains forming large channels apt to take up the Ba 2+ cations. These divalent cations exhibit eight contacts to chalcogenide anions resulting in the formation of bicapped trigonal prisms [Ba Ch 8] 14每.
%K Lutetium
%K Chalcogenides
%K Barium
%K Crystal Structures
%U http://www.mdpi.com/2073-4352/1/3/78