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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
International Union of Crystallography
2020
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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 |
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. |
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