Mineral     (hkl)    °2-theta
illite      (001)     8.7      10.1
chlorite    (001)     6.2      14.2
            (002)    12.4       7.11
            (003)    18.8       4.72
            (004)    25.1       3.54
smectite    (001)     5.2      17.0
kaolinite   (001)    12.4       7.11
            (002)    25.1       3.54
quartz      (100)    20.8       4.26
K-feldspar  (002)    27.5       3.24
plagioclase (002)    27.9       3.18