Re-examining the crystal structure behaviour of nitrogen and methane

dc.contributor.authorMaynard-Casely, HEen_AU
dc.contributor.authorHester, JRen_AU
dc.contributor.authorBrand, HEAen_AU
dc.date.accessioned2020-09-16T05:51:54Zen_AU
dc.date.available2020-09-16T05:51:54Zen_AU
dc.date.issued2020-09-01en_AU
dc.date.statistics2020-09-15en_AU
dc.description.abstracttructures of both methane and nitrogen have previously garnered significant interest, but these investigations tailed off thirty years ago with emphasis being more recently on their high-pressure structures (Neumann et al., 2003[Neumann, M. A., Press, W., Nöldeke, C., Asmussen, B., Prager, M. & Ibberson, R. M. (2003). J. Chem. Phys. 119, 1586-1589.]; Maynard-Casely et al., 2010[Maynard-Casely, H., Bull, C., Guthrie, M., Loa, I., McMahon, M., Gregoryanz, E., Nelmes, R. & Loveday, J. (2010). J. Chem. Phys. 133, 064504.], 2014[Maynard-Casely, H., Lundegaard, L., Loa, I., McMahon, M., Gregoryanz, E., Nelmes, R. & Loveday, J. (2014). J. Chem. Phys. 141, 234313.]; Hanfland et al., 1998[Hanfland, M., Lorenzen, M., Wassilew-Reul, C. & Zontone, F. (1998). Rev. High Press. Sci. Technol., 7, 787-789.]; Stinton et al., 2009[Stinton, G., Loa, I., Lundegaard, L. & McMahon, M. (2009). J. Chem. Phys. 131, 104511.]). In light of the fact that methane and nitrogen have now been confirmed to be important materials for shaping the surface of other planetary bodies, we undertook an investigation to examine their solid-phase behaviour and to determine their thermal expansion. Previous determinations of the thermal linear expansion of methane and nitrogen used a dilatometer, restricted to the range 4.2–40 K for nitrogen (Heberlein et al., 1970[Heberlein, D., Adams, E. & Scott, T. (1970). J. Low Temp. Phys. 2, 449-463.]) and 4–26 K for methane (Heberlein & Adams, 1970[Heberlein, D. & Adams, E. (1970). J. Low Temp. Phys. 3, 115-121.]; Manzhelii et al., 1969[Manzhelii, V., Tolkachev, A. & Gavrilko, V. (1969). J. Phys. Chem. Solids, 30, 2759-2763.]). In the present study, we determined the volume change and derived the linear expansion from neutron diffraction data, encompassing the whole range of Pluto temperatures (24 to 54 K) while also allowing insights into their crystal structures. © The Authorsen_AU
dc.identifier.citationMaynard-Casely, H. E., Hester, J. R., & Brand, H. E. A. (2020). Re-examining the crystal structure behaviour of nitrogen and methane. IUCrJ, 7(5), 844-851. doi: 10.1107/S2052252520007460en_AU
dc.identifier.issn2052-2525en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleIUCrJen_AU
dc.identifier.pagination844-851en_AU
dc.identifier.urihttps://doi.org/10.1107/S2052252520007460en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/9791en_AU
dc.identifier.volume7en_AU
dc.language.isoenen_AU
dc.publisherInternational Union of Crystallographyen_AU
dc.subjectMolecular crystalsen_AU
dc.subjectPluto planeten_AU
dc.subjectThermal expansionen_AU
dc.subjectMethaneen_AU
dc.subjectCrystal structureen_AU
dc.subjectCrystal-phase transformationsen_AU
dc.titleRe-examining the crystal structure behaviour of nitrogen and methaneen_AU
dc.typeJournal Articleen_AU
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