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Re-examining the crystal structure behaviour of nitrogen and methane

In the light of NASA’s New Horizons mission, the solid-phase behaviour of methane and nitrogen has been re-examined and the thermal expansion coefficients of both materials have been determined over their whole solid temperature range for the first time. Neutron diffraction results indicate that the...

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Detalles Bibliográficos
Autores principales: Maynard-Casely, Helen E., Hester, James R., Brand, Helen E. A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7467175/
https://www.ncbi.nlm.nih.gov/pubmed/32939276
http://dx.doi.org/10.1107/S2052252520007460
Descripción
Sumario:In the light of NASA’s New Horizons mission, the solid-phase behaviour of methane and nitrogen has been re-examined and the thermal expansion coefficients of both materials have been determined over their whole solid temperature range for the first time. Neutron diffraction results indicate that the symmetric Pa 3 space group is the best description for the α-nitrogen structure, rather than the long-accepted P2(1)3. Furthermore, it is also observed that β-nitrogen and methane phase I show changes in texture on warming, indicating grain growth.