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

 

Chem. Met. Alloys 6 (2013) 225-229

 

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 Y2.97(1)Ti0.08(2)Ga1.95(1) and a = 11.4577(9), c = 14.6999(12) Å for Er3Ti0.08(2)Ga1.92(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 Er3Ti0.08(2)Ga1.92(2).

 

Keywords

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