Table 1 Mineral content of raw and purified samples determined by XRD
Sample | Montmorillonite (%) | Illite (%) | Feldpars (%) | Calcite (%) | Quartz (%) |
|---|---|---|---|---|---|
RBN | 59 | 5 | 20 | 5 | 11 |
RBN-1 | 100 | 0 | 0 | 0 | 0 |
Natural Wyoming bentonitea | 85 | 0 | 0 | 5 | 10 |
Purified Wyoming bentonitea | 100 | 0 | 0 | 0 | 0 |