Фазовая диаграмма системы Li-Rh

К оглавлению: Другие диаграммы (Others phase diargams)


Li-Rh (Lithium-Rhodium) J. Sangster and A.D. Pelton The assessed Li-Rh phase diagram is highly speculative, based on very limited data. No liquidus data have been published for this system. [64Mag] and [78Whe] performed thermal analysis, but no experimental details were given. For alloys containing less than 50 at.% Rh, "melting points" were observed consistently at 0.5 C below the melting point of pure Li. This may be interpreted as a eutectic temperature. Although the solubility of Rh in solid (Li) has not been measured, atomic size and structure considerations suggest an extremely low solubility. According to [81Loe], the solubility of Li in solid (Rh) is very small. The compound LiRh has been prepared by direct combination of the element in iron [65Sid, 64Mag, 78Whe] or stainless steel [60Far] containers and characterized by its X-ray pattern [60Far, 65Sid, 64Mag]. The congruent melting point was proposed [64Mag, 78Whe] to be 1890 C or higher. [76Don] detected the compound LiRh3, which they characterized by X-ray diffraction. The tentative calculated congruent melting point for LiRh3 is ~1670 C. The assessed Li-Rh diagram is consistent with the available data and is thermodynamically reasonable. 60Far: J.D. Farr, J. Inorg. Nucl. Chem., 14(3-4), 202-207 (1960). 64Mag: C.B. Magee, Final Rep. Joint US/EURATOM Res. Development Program, Contract No. AT(11-1)-1185, Denver Res. Inst., Univ. Denver (AEC Accession No. 4583, DRI-2184) (1964). 65Sid: S.S. Sidhu, K.D. Anderson, and D.D. Zauberis, Acta Crystallogr., 18(5), 906-907 (1965). 76Don: H.C. Donkersloot and J.H.N. Van Vucht, J. Less-Common Met., 50(2), 279- 282 (1976). 78Whe: H.G. Wheat, C.-Y. Cheng, R.J. Bayuzick, R.W. Sullivan, and C.B. Magee, J. Less-Common Met., 58(1), P13-P29 (1978). 81Loe: O. Loebich and C.J. Raub, Platinum Met. Rev., 25(3), 113-120 (1981). Submitted to the APD Program. Complete evaluation contains 1 figure, 2 tables, and 7 references. 1