title: The low-temperature form of calcium gold stannide, CaAuSn.
abstract: The EuAuGe-type CaAuSn phase has been synthesized and single-crystal X-ray diffraction analysis reveals that it has an orthorhombic symmetry (space group Imm2), with a = 4.5261 (7) Å, b = 7.1356 (11) Å and c = 7.8147 (11) Å. The structure features puckered layers that are connected by homoatomic Au-Au and Sn-Sn interlayer bonds. This structure is one of the two parent structures of its high-temperature polymorph (ca 873 K), which is an intergrowth structure of the EuAuGe- and SrMgSi-type structures in a 2:3 ratio.
authors.affiliation: Ames Laboratory, US DOE, Iowa State University, Ames, IA 50011, USA.
authors.forename: Qisheng
authors.initials: Q
authors.lastname: Lin
authors.affiliation: Ames Laboratory, US DOE, Iowa State University, Ames, IA 50011, USA.
authors.forename: John D
authors.initials: JD
authors.lastname: Corbett
keywords: EuAuGe-type; calcium gold stannide; crystal structure; intergrowth structure; low-temperature study; single-crystal X-ray diffraction