X-ray investigation of the equilibrium phase diagram of CH4-N2 solid mixtures
A. I. ProkhvatilovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , Khar'kovL. D. YantsevichPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , Khar'kov
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The phase diagram of solid methane-nitrogen mixtures is investigated by x rays. The boundaries of the maximum reciprocal solubility of the components are determined in the temperature range from 5 °K to the melting point of the mixture. The lattice parameters and molar volumes of the observed phases are studied as a function of temperature and concentration. Negative thermal expansion is found at certain temperatures and concentrations of nitrogen in methane crystals.
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