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. 2014 Oct 31;4:6764. doi: 10.1038/srep06764

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Mineral spectra of (a) quartz, (b) illite, (c) montmorillonite, (d) kaolinite, (e) albite, (f) orthoclase, (g) calcite and (h) dolomite (black) with respective selectivity ratios (red).