The structure of R(1-x)Ga2(1- x)(0 < x < 0.33) and its relation to RGa6 (R = Rare Earth Element) and Ga |
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| Authors: | G. Kimmel D. Dayan L. Zevin J. Pelleg |
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| Affiliation: | (1) Nuclear Research Center-Negev, Israel;(2) Materials Engineering Department, Israel;(3) Institute of Applied Research, Ben-Gurion University of the Negev, Israel;(4) Materials Engineering Department, Ben-Gurion University of the Negev, P.O. Box 653, 84105 Beer-Sheva, Israel |
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| Abstract: | X-ray diffraction studies were used to investigate the wide solubility range of Ga in RGa2 type compounds observed in several systems of light rare earth metals (= R) with Ga. A model, based on pairwise substitution of R atoms by Ga atoms, is suggested to explain the observed wide solubility. Using this model it is possible to explain the change in lattice parameters of the ε phase having the formula R(1-x)Ga2(1+x). The structural relationships among the phases RGa2, R(1-x)Ga2(1+x,RGa6, and pure Ga are delineated, and the common feature of these phases which belong to widely different crystal systems is shown. |
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