Fizika Nizkikh Temperatur: Volume 45, Number 12 (December 2019), p. 1531-1537 ( to contents , go back )
Structural transformations in N2–Kr alloys
A.A. Solodovnik and N.S. Mysko-Krutik
B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Nauki Ave., Kharkiv 61103, Ukraine
Received July 26, 2019, revised September 5, 2019, published online October 25, 2019
An electron diffraction study of structural characteristics of N2–Kr alloys is carried out over the entire range of mutual concentrations. The samples were prepared in situ by depositing a gaseous mixture on aluminum and carbon substrates at temperatures of 5 and 20 K. The structure and the solubility regions of the solutions were determined. The limiting solubilities of the components are: krypton in a nitrogen crystal is less than 20 mol.%; nitrogen in solid krypton is less than 11 mol%. In concentration interval 20–89 mol.% Kr phase separation of alloys was observed. The effect of the dilution molecular matrix by krypton upon on orientational ordering of the N2 molecules was investigated. An experimental dependence of the orientational order factor as a function of the composition is obtained for solutions rich in N2.
Key words: N2–Kr alloys, electron diffraction study, solubility.