Poster Number 69
See more from this Division: General Discipline Sessions
See more from this Session: Mineralogy/Crystallography; Petrology, Experimental; Igneous; Metamorphic (Posters)
Abstract:
To use Rietveld analysis for both the expandible and non-expandible clays, the atomic positions are necessary to generate a combined atomic structure model . While the starting atomic positions of the expanded lattice are difficult to determine, it's experimental diffraction pattern can be readily measured for the base lattice phase. Then, using the least square refinement to generate a simulated crystal structure of the expanded system, the expandible clay structures can be simulated. This new expanded clay model then becomes the starting atomic model for Rietveld Refinements and can quantifying the expandable specimen component. With a fairly accurate atomic model of montmorillionite and illite, a series of quantitative mixtures were analyzed for accuracy and precision.
See more from this Division: General Discipline Sessions
See more from this Session: Mineralogy/Crystallography; Petrology, Experimental; Igneous; Metamorphic (Posters)