Isothermal section of the Tb–Cu–Sn system at 670 K

Chem. Met. Alloys 14 (2021) 48-57

https://doi.org/10.30970/cma14.0420

Lyubov ROMAKA, Vitaliy ROMAKA, Mariya KONYK, Yuriy STADNYK

The phase relations in the ternary system Tb-Cu-Sn have been studied at 670 K over the whole concentration range by X-ray powder diffraction and energy-dispersive X-ray spectroscopy. The phase equilibria at 670 K are characterized by the formation of five ternary compounds: TbCuSn (LiGaGe-type, space group P6₃mc, a = 0.4517(2), c = 0.7272(3) nm), Tb₃Cu₄Sn₄ (Gd₃Cu₄Ge₄-type, space group Immm, a = 0.4421(3), b = 0.6939(3), c = 1.4547(5) nm), TbCu₅Sn (CeCu₅Au-type, space group Pnma, a = 0.82205(1), b = 0.49789(3), c = 1.05766(6) nm), Tb_1.9Cu_9.2Sn_2.8 (Dy_1.9Cu_9.2Sn_2.8-type, space group P6₃/mmc, a = 0.50355(9), c = 2.0414(6) nm) and Tb₂Cu_3.5Sn_5.5 (Sm₂Cu₄Sn₅-type, space group I4mm, a = 0.4404(4), b = 2.5854(3) nm).

Isothermal section of the Tb–Cu–Sn system at 670 K.

Keywords

Intermetallics / Phase diagrams / X-ray diffraction / Crystal structure