Thermal expansion and crystal structure of Pr, Nd, and Sm in the 87-1073 0 K range

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Thermal expansion and crystal structure of Pr, Nd, and Sm in the 87-1073 0 K range

Post by Algerien1970 on Sat 23 May - 0:59



Thermal expansion and crystal structure of Pr, Nd, and Sm in the 87-1073 0 K range


ABSTRACT : The temperature dependences of the lattice periods and electrical resistivity of Pr, Nd, and Sm were determined. These dependences had anomalies at 605-680 oK for Pr, at 648-750 oK for Nd, and at 380-500 oK for Sm. The discontinuities of the atomic volume and electrical resistivity of Sm near 980 oK were attributed to a ftrst-order phase transition from the rhombohedral to the hexagonal close-packed structure: Sm,h",SmhcP'.


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