A large volume cell for in situ neutron diffraction studies of hydrothermal crystallizations

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dc.contributor.authorXia, Fen_AU
dc.contributor.authorQian, GJen_AU
dc.contributor.authorBrugger, Jen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorOlsen, SRen_AU
dc.contributor.authorPring, Aen_AU
dc.date.accessioned2010-11-22T00:32:30Zen_AU
dc.date.available2010-11-22T00:32:30Zen_AU
dc.date.issued2010-10-19en_AU
dc.date.statistics2010-10en_AU
dc.description.abstractA hydrothermal cell with 320 ml internal volume has been designed and constructed for in situ neutron diffraction studies of hydrothermal crystallizations. The cell design adopts a dumbbell configuration assembled with standard commercial stainless steel components and a zero-scattering Ti–Zr alloy sample compartment. The fluid movement and heat transfer are simply driven by natural convection due to the natural temperature gradient along the fluid path, so that the temperature at the sample compartment can be stably sustained by heating the fluid in the bottom fluid reservoir. The cell can operate at temperatures up to 300 °C and pressures up to 90 bars and is suitable for studying reactions requiring a large volume of hydrothermal fluid to damp out the negative effect from the change of fluid composition during the course of the reactions. The capability of the cell was demonstrated by a hydrothermal phase transformation investigation from leucite (KAlSi2O6) to analcime (NaAlSi2O6⋅H2O) at 210 °C on the high intensity powder diffractometer Wombat in ANSTO. The kinetics of the transformation has been resolved by collecting diffraction patterns every 10 min followed by Rietveld quantitative phase analysis. The classical Avrami/Arrhenius analysis gives an activation energy of 82.3±1.1 kJ mol−1. Estimations of the reaction rate under natural environments by extrapolations agree well with petrological observations. © 2010, American Institute of Physicsen_AU
dc.identifier.articlenumber105107en_AU
dc.identifier.citationXia, F., Qian, G., Brugger, J., Studer, A., Olsen, S., & Pring, A. (2010). A large volume cell for in situ neutron diffraction studies of hydrothermal crystallizations. Review of Scientific Instruments, 81(10), 105107. doi;10.1063/1.3484281en_AU
dc.identifier.govdoc3053en_AU
dc.identifier.issn0034-6748en_AU
dc.identifier.issue10en_AU
dc.identifier.journaltitleReview of Scientific Instrumentsen_AU
dc.identifier.urihttp://dx.doi.org/10.1063/1.3484281en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2862en_AU
dc.identifier.volume81en_AU
dc.language.isoenen_AU
dc.publisherAmerican Institute of Physicsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectCrystallizationen_AU
dc.subjectPhase transformationsen_AU
dc.subjectHydrothermal systemsen_AU
dc.subjectFluidsen_AU
dc.subjectHeat transferen_AU
dc.titleA large volume cell for in situ neutron diffraction studies of hydrothermal crystallizationsen_AU
dc.typeJournal Articleen_AU
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