Thermal Expansion Of Rare Earth Metals
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High Temperature Allotropy and Thermal Expansion of the Rare-earth Metals
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Total Pages | : |
Release | : 1960 |
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By means of high temperature X-ray techniques the crystal structure of lanthanum, cerium, praseodymium, neodymium, ytterbium, and possibly gadolinium was found to be body-centered cubic at temperatures near their respective melting points. For ytterbium a hexagonal close-packed structure was also observed, which was shown to be stabilized by atmospheric impurities. Evidence for possible high temperature crystalline transformations in gadolinium, terbium, dysprosium, holmium, and lutetium was obtained by means of electrical resistance measurements; erbium gave no such evidence. X-ray data were used to derive empirical equations which describe thermal expansions coefficients of scandium, yttrium and the rare-earth metals. Europium exhibits a rapidly decreasing coefficient of expansion with increasing temperature, which may be a consequence of a gradual promotion of one of the 4f electrons into the conduction band. The hexagonal rare-earth metals were found to have nearly the same axial ratio at their respective transformation temperatures.
Compilation of the Properties of the Rare Earth Metals and Compounds
Author | : Battelle Memorial Institute |
Publisher | : |
Total Pages | : 298 |
Release | : 1959 |
Genre | : Rare earth metal compounds |
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High-temperature Compounds of Rare Earth Metals with Nonmetals
Author | : Grigoriĭ Valentinovich Samsonov |
Publisher | : |
Total Pages | : 308 |
Release | : 1965 |
Genre | : Rare earth metals |
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THERMAL EXPANSION AND PHASE INVERSION OF RARE-EARTH OXIDES.
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Total Pages | : |
Release | : 1960 |
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Thermal expansion and phase inversion measurements are reported on oxides of Sc, Y, La, and 12 lanthanide series elements up to 1350 deg C. (J.R.D.).
Handbook of the Rare Elements: Radioactive elements and rare earth elements
Author | : M. A. Fili͡and |
Publisher | : |
Total Pages | : 320 |
Release | : 1970 |
Genre | : Nonferrous metals |
ISBN | : |