Solid solutions of Ti in the binary compounds R3Ga2 (R = Y, Er)

solid solutions of Ti in the binary compounds R₃Ga₂ (R = Y, Er)

Chem. Met. Alloys 6 (2013) 225-229

https://doi.org/10.30970/cma6.0287

Anastasiya KOTSYUBAYLO, Anatoliy ZELINSKIY, Yaroslav TOKAYCHUK, Roman GLADYSHEVSKII

The crystal structures of two samples belonging to the substitutional solid solutions of Ti (1.6 at.% at 600ºC) in the binary gallides Y₃Ga₂ and Er₃Ga₂ were refined from X-ray powder diffraction data. Both solid solutions belong to the structure type Gd₃Ga₂: Pearson symbol tI80, space group I4/mcm, a = 11.6264(11), c = 14.8543(14) Å for Y_2.97(₁₎Ti_0.08(2)Ga_1.95(1) and a = 11.4577(9), c = 14.6999(12) Å for Er₃Ti_0.08(2)Ga_1.92(2). In the former case titanium atoms substitute for both Y and Ga atoms (icosahedral and cubic coordination, respectively), whereas in the latter case the titanium atoms exclusively substitute for Ga atoms (cubic coordination).

Unit cell content and coordination polyhedra in the structure of Er₃Ti_0.08(₂₎Ga_1.92(2).

Keywords

Rare-earth metals / Titanium / Gallium / X-ray powder diffraction / Solid solution / Crystal structure