1997 •
On the solubility of aluminium in the intermetallic compound CoGa3
Authors:
H. Meyer, M. Ellner
Abstract:
Abstract The gallium atomic positions in the intermetallic compound CoGa 3 (Pearson Symbol tP 16, space group P 4 2 / mnm ) can be occupied by aluminium up to x A1 = 0.35. Lattice parameters were measured in the whole homogeneity range of CoAl x Ga 3 − x . Both the axial ratio c a and the unit cell volume decrease with increasing aluminium content. The extrapolated average atomic volume for the hypothetical phase ‘CoAl 3 with CoGa 3 structure’ is significantly higher than the average atomic volume of the observed non-defect cobalt/alumini (...)
Abstract The gallium atomic positions in the intermetallic compound CoGa 3 (Pearson Symbol tP 16, space group P 4 2 / mnm ) can be occupied by aluminium up to x A1 = 0.35. Lattice parameters were measured in the whole homogeneity range of CoAl x Ga 3 − x . Both the axial ratio c a and the unit cell volume decrease with increasing aluminium content. The extrapolated average atomic volume for the hypothetical phase ‘CoAl 3 with CoGa 3 structure’ is significantly higher than the average atomic volume of the observed non-defect cobalt/aluminium-containing structure occurring near the stoichiometry CoAl 3 oCo 4 Al 13 ( oP 102, oCo 4 Al 13 type). The measured data of the pseudoternary phase CoAl x Ga 3 − x are compared with data for the other gallium-containing representatives of the CoGa 3 structure type. (Read More)
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