Figure F3. Detail of X-ray diffraction patterns of (060) smectite peaks in Figure F1, Sites U1346 and U1349. Peaks at 1.538, 1.530, 1.520, 1.498, and 1.490 Å correspond to saponite, hectorite, stevensite, nontronite, and montmorillonite, respectively. A. Peaks at 1.538 and 1.490 Å indicate saponite/hectorite and montmorillonite. B. Peaks at 1.498 and between 1.520 and 1.538 Å indicate nontronite and a Mg-smectite whose composition is between hectorite and stevensite.
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