Crystal structure of Dy2Ga1.8Ge5.2 | Zendy

Yaroslav TOKAYCHUK | Zendy; Taras Delenko | Zendy; R. Gladyshevskii | Zendy

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Crystal structure of Dy2Ga1.8Ge5.2

Author(s) -

Yaroslav TOKAYCHUK,

Taras Delenko,

R. Gladyshevskii

Publication year - 2013

Publication title -

chemistry of metals and alloys

Language(s) - English

Resource type - Journals

eISSN - 1998-8087

pISSN - 1998-8079

DOI - 10.30970/cma6.0286

Subject(s) - crystallography , crystal structure , intermetallic , germanium , square antiprism , dysprosium , materials science , gallium , space group , structure type , type (biology) , x ray crystallography , ternary operation , germanide , superstructure , diffraction , powder diffraction , lanthanide , chemistry , metallurgy , physics , inorganic chemistry , optics , ion , silicon , alloy , ecology , computer science , biology , thermodynamics , programming language , organic chemistry

A new ternary intermetallic compound, Dy2Ga1.8Ge5.2, was synthesized and its crystal structure determi ned from X-ray powder diffraction data: structure type Sm2(Ga0.26Ge0.74)7, Pearson symbol oS80-8, space group Cmce, a = 8.3284(6), b = 8.0320(6), c = 20.9167(15) Å, Z = 8. The structure type Sm2(Ga0.26Ge0.74)7 is closely related to the type Ce2(Ga0.1Ge0.9)7. Both types are vacancy derivatives of the structu re type SmNiGe3, which is a linear intergrowth of layers characteristic of the structure types BaAl 4, AlB2, and α-Po. In the structure of Dy2Ga1.8Ge5.2 every second square antiprism in the BaAl 4-type slabs is vacant and the Ga/Ge atoms centering the remaining antiprisms are subjected to displacement disorder modeled by a split site.

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