Accession Number : ADD095511

Title :   A Review of Deuterium Triple-Point Temperatures,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Schwalbe, L A ; Grilly, E R

Report Date : Jan 1984

Pagination or Media Count : 12

Abstract : A review is presented of the existing measurements of the triple-point temperatures T subscript tp of deuterium. All data are adjusted to a common temperature scale, and error limits are proposed where none was provided in the source publications. The effects of sample contamination are also considered. Impurity corrections, based on estimated from vapor-pressure measurements, are applied to the results. The analytical representation T subscript tp (x) = 18.680 + 0.155x, where x is the fraction of p-D2(J = 1), is found to represent T subscript tp to + or - 0.010 K. The value, 18,723 + or = 0.010 K, measured most recently on normal deuterium is consistent with the most accurate and precise of the earlier data. Originator supplied keywords include: Deuterium, Fixed points; Hydrogen isotopes; Ortho-para conversion; and Triple point.

Descriptors :   *TEMPERATURE, *DEUTERIUM, *PHASE STUDIES, SCALE, HYDROGEN, ISOTOPES, CONTAMINATION, ERRORS, LIMITATIONS, EQUILIBRIUM(GENERAL)

Subject Categories : Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE