Table 4:
X-Ray Diffraction.
Mineral Phase
Mineral Relative Abundance
RA 1
RA 2
Calcite
****
****
Gypsum
**
*
Phologopite
**
*
Quartz
*****
*****
Sanidine
***
**
Note: The results correspond to the average of 6 samples taken from every type of RA.