|
|||||
|
|
Ce(Au,Sb)2 with UHg2 structure type, a new member of the AlB2 family |
|
| Authors: | LP Salamakha OL Sologub AP Gonalves SI Mudryi VB Kapustianyk M Almeida |
| Affiliation: | aDepartamento de Quìmica, Instituto Tecnológico e Nuclear/CFMC-UL, P-2686-953 Sacavém, Portugal bDepartment of Physics of Metals, Faculty of Physics, L’viv National University, Kyryla i Mefodiya str. 8, 79005 L’viv, Ukraine cResearch Center of Low Temperature Studies, L’viv National University, Drahomanova str. 50, 79005 L’viv, Ukraine |
| Abstract: | A new ternary compound Ce(Au,Sb)2, with a homogeneity range has been observed from X-ray powder diffraction of as cast alloys, a = 4.743–4.712 Å, c = 3.567–3.768 Å. Its crystal structure was investigated by X-ray diffraction from Ce(Au1?xSbx)2 (x = 0.266) single crystal: CAD-4 automatic diffractometer, Mo K radiation, a = 4.7256(6) Å, c = 3.6711(6) Å, P6/mmm space group, V = 70.997(17) Å3, Z = 1, ρ = 10.732 Mg/m3, μ = 76.369 mm?1, R1 = 0.0415, wR2 = 0.0793 for 99 reflections with I > 2σ(I0). The coordination polyhedron of X (X = 0.734Au + 0.266Sb) atom is a full-capped trigonal prism XCe6X3X2]. Ce atom is coordinated by 14 atoms: CeX12Ce2]. The compound is isotypic with UHg2 structure, a deformation derivative of AlB2 structure type. It forms isostructural compounds with La and Pr. |
| Keywords: | Cerium gold antimonides Aluminum diboride structure type UHg2 structural branch Single crystal X-ray diffraction |
| 本文献已被 ScienceDirect 等数据库收录！ | |