Fizika Nizkikh Temperatur: Volume 43, Number 12 (December 2017), p. 1754-1760    ( to contents , go back )

Structure of cryoalloys N2–CH4

A.A. Solodovnik, N.S. Mysko-Krutik, and M.I. Bagatskii

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine
E-mail: solodovnik@ilt.kharkov.ua

Received March 6, 2017, revised June 6, 2017

Abstract

With the use of transmission electron diffraction, the structure of N2–CH4 alloys was studied in the en-tire region of mutual concentrations. The samples were prepared in situ by depositing a gaseous mixture on an aluminum and carbon substrate at temperatures of 19 and 5 K. The solubility regions and the structure of the solutions were determined. The limiting solubilities of the components are: methane in a nitrogen crystal is less than 6 mol.%, nitrogen in solid methane is less than 35 mol.%. For small concentrations of components in solutions an analysis was made of the dependence of the lattice parameter on the composition in the framework of the three-cluster model. The effect of impurity CH4 molecules on the orientational ordering of N2 molecules in solutions was investigated.

PACS: 78.55.Kz Solid organic materials;
PACS: 61.05.J– Electron diffraction and scattering;
PACS: 81.30.Bx Phase diagrams of metals, alloys, and oxides.

Key words: cryoalloys, electronic diffraction, cluster approximation.

Published online: October 25, 2017

Download 462052 byte View Contents