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Measurement of the Lattice Constants of Neon Isotopes in the Temperature Range 4–24°K

Published online by Cambridge University Press:  06 March 2019

L. H. Bolz  and
F. A. Mauer
L. H. Bolz
Affiliation:
National Bureau of Standards, Washington, B.C.
F. A. Mauer
Affiliation:
National Bureau of Standards, Washington, B.C.
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Abstract

Using an X-ray diffractonieter cryostat, the lattice constants of the isotopes 20Ne and 22Ne as well as the naturally occurring mixture have been measured throughout most of the temperature range in which they exist as solids (0 to approximately 24°K), The heavier isotope has the smaller lattice constant, the values obtained at 4.2°K being: 20Ne—4.4624 Å, 22Ne—4.4540 Å, and 11Ne—4.4622 Å. The absolute error in these values is believed to be no greater than 0.001 A. The volume expansion coefficient, which does not appear to differ significantly in the three cases, increases to a value of 6.3 × 10−3/°K at 24°K.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 6: Eleventh Annual Conference on Applications of X-ray Analysis, August 8-10, 1962 , 1962 , pp. 242 - 249
Copyright
Copyright © International Centre for Diffraction Data 1962

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