Mesbah Adel, Stojko Wojciech, Ibers James A
Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, USA.
Acta Crystallogr Sect E Struct Rep Online. 2013 Mar 1;69(Pt 3):i17. doi: 10.1107/S1600536813003541. Epub 2013 Feb 13.
Barium dierbium(III) tetra-sulfide, BaEr2S4, crystallizes with four formula units in the ortho-rhom-bic space group Pnma in the CaFe2O4 structure type. The asymmetric unit contains two Er, one Ba, and four S atoms, each with .m. site symmetry. The structure consists of channels formed by corner- and edge-sharing ErS6 octa-hedra in which Ba atoms reside. The resultant coordination of Ba is that of a bicapped trigonal prism.
四硫化二铒钡（BaEr₂S₄）以四个化学式单元结晶，属于正交晶系空间群Pnma，具有CaFe₂O₄结构类型。不对称单元包含两个铒（Er）原子、一个钡（Ba）原子和四个硫（S）原子，每个原子具有.m. 位点对称性。该结构由通过角共享和边共享的ErS₆八面体形成的通道组成，钡原子位于这些通道中。钡的最终配位是双帽三角棱柱配位。
