Neutron diffraction study of the TbFeSi2-type NdMnCu0.5Ge1.5−xSix (0≤x≤1.5) solid solution

Norlidah, M.N.; Venturini, G.; Malaman, B.; Ressouche, E.

doi:10.1016/s0925-8388(97)00108-4

Cited by 8 publications

(1 citation statement)

References 13 publications

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“…Representatives of the TbFeSi 2 type have been reported in several R-Mn-Si systems (R = La, Ce-Nd, Sm) [12,13]. The structure type TbFeSi 2 also has quaternary representatives in R-Mn-T-M systems where T is a d-element, and M is a p-element of group IV: RMnPd 0.5 Si 1.5 ( R = La, Ce), RMnPt 0.5 Si 1.5 (R = La, Ce, Pr), RMnCu 0.5 Si 1.5 ( R = La, Ce-Nd), RMnNi 0.5 Ge 1.5 (R = La, Ce-Nd), RMnPd 0.5 Ge 1.5 ( R = La, Ce-Nd), RMnPt 0.5 Ge 1.5 (R = La), RMnCu 0.5 Ge 1.5 (R = Nd, Sm) [14,15]. The structure type LaMnCu 0.5 Ge 1.5 ( oS16, Cmcm -c 4 ) [16] is a quaternary variant of the types CeNiSi 2 and TbFeSi 2 , where one of the atom sites is occupied by a statistical mixture of Cu and Ge atoms.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure of the Ternary Compound ErRe0.25Ge2

Mykhalichko¹,

Gladyshevskii²

2016

ChChT

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An alloy of nominal composition Er 30.8 Re 7.7 Ge 61.5 was synthesized by arc melting and investigated by X-ray powder diffraction. A new ternary germanide of approximate composition ErRe 0.25 Ge 2 was found, which adopts the structure type CeNiSi 2 (Pearson symbol oS16, space group Cmcm, a = 4.0997(4), b = 15.7348(18), c = 3.9921(5) Å, R B = 0.0355, refined composition ErRe 0.23(2) Ge 2 , for the as-cast alloy; a = 4.1117(3), b = 15.6846(15), c = 4.0184(3) Å, R B = 0.0420, refined composition ErRe 0.28(2) Ge 2 , after annealing at 1073 K). The coordination polyhedron of the Er atoms has 21 vertexes (hexagonal prism with nine additional atoms), that of the Re atoms is a bicapped square antiprism and the two crystallographically independent Ge atoms center tricapped trigonal prisms and cuboctahedra. The crystal structure contains layers of trigonal prisms (characteristic of the structure type AlB 2) and square antiprisms (characteristic of the structure types BaAl 4 and CeAl 2 Ga 2), which alternate along the crystallographic direction [010]. The polyhedron surrounding the site partly occupied by the transition metal atoms is compared with the corresponding polyhedra in closely related structures.

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Section: Introductionmentioning

confidence: 99%