Kaolin Spergau

Site map

Up Kaolin Spergau Metashale Böhlscheiben Smectite
Copper Shale Variable Divergence Trimer

BGMN Application: Standard Sample Kaolin Spergau

Author:
Dr. R. Kleeberg

Sample preparation:
Measurement:

Calculation:

Phase Lattice parameter count Prefered orientation Peak model Special features
quartz 2 - crystallite size -
kaolinite 6 6 crystallite size; microstrain 6 disordering parameters
muscovite 2M1 4 6th order;
automatic
reduced
to 2th order
crystallite size anisotropic site occupation for K+

Table 1: Phase parameters for calculation

Results:
Rwp = 11.7 %; calculation time: 1 h 45 min;
Phase Nominal content Rietveld content
quartz 15.0 16.9
kaolinite 71.6 75.4
muscovite 2M1 12.8 (illite) 7.7

Table 2: Calculation results (weight %)

Remark:

the calculated mica concentration is too low because substantial more illite 1M and 1Md than muscovite is contained in the sample; consequently quartz and kaolinite are overestimated

Figure 1: Observed, calculated and difference Cu-K-alpha powder pattern for the kaolin Spergau sample