Large-Area Quantitative Phase Mapping


Figure 3 : X-ray element maps of the grain shown in Figure 2 . Maps were acquired at 15 kV. Note that these element maps indicate the presence of at least six mineral phases rather than the four phases estimated from Figure 2 .


Figure 4 : COMPASS phase maps of the grain shown in Figure 2 . COMPASS software reveals seven groups of associated elements in the spectrum image data cube that are likely to be actual mineral phases. COMPASS analysis of the data cube took between 1 and 6 seconds depending on the speed of the Windows PC. Image width = 115 µm.


40 www.microscopy-today.com • 2017 March


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