Archive | 2019
Crystal structure of the ternary compound Gd2Ge3.84Sn0.92
Abstract
The new ternary intermetallic compound Gd2Ge3.84(4)Sn0.92(4) was synthesized and its crystal structure was determined by X-ray powder diffraction (structure type Nd2Ge3.55Sn1.24, Pearson symbol oS40, space group Cmcm, a = 4.0434(6), b = 35.284(6), c = 4.1724(6) Å, Z = 4). The structure type Nd2Ge3.55Sn1.24 contains triple slabs of trigonal prisms stacked as in α-ThSi2 and double square-mesh atom nets. It is a member o f the linear intergrowth structure series built up from segments of the structure types AlB2, CaF2 and α-Po. The zigzag chains of Ge atoms inside the central prism slab ar e deficient and the disordered atom arrangement is modeled by two split sites.