Abstract

Ternary NdPrSb alloys were studied using X-ray powder diffraction and optical and electron microscopy. (Nd, Pr) 2Sb (tI12 — La 2Sb type), (Nd, Pr) 4Sb 3 (cI28 — anti-Th 3P 4 type), (Nd, Pr)Sb (cF8 — NaCl type) and (Nd, Pr)Sb 2 (oC24 — SmSb 2 type) show complete solubility between Nd and Pr. The variation of the lattice parameters as a function of the Nd to Pr ratio was determined. In addition, the alloy Nd 0.475Pr 0.475Sb 0.05 was investigated by differential thermal analysis (DTA). The results obtained confirm a previous thermodynamic prediction of the NdPrSb phase equilibria.

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