Table 7 Major diffraction peaks and corresponding mineral phases identified in the XRD pattern of the sandstone sample.
No. | 2θ (°) | Relative Intensity (A.U.) | Mineral Phase | Remarks |
|---|---|---|---|---|
1 | 20.8 | ~ 3,000 | Quartz (SiO₂) | Secondary quartz reflection |
2 | 26.6 | ~ 14,000 | Quartz (SiO₂) | Major quartz peak |
3 | 36.5 | ~ 1,500 | Quartz (SiO₂) | Confirms polycrystalline phase |
4 | 50.1 | ~ 6,500 | Quartz (SiO₂) | Strong secondary reflection |
5 | 60.0 | ~ 3,200 | Quartz (SiO₂) | Distinct high-angle peak |
6 | 30–40 | Minor peaks | Feldspar (KAlSi₃O₈) | Accessory mineral |
7 | 60–70 | Minor peaks | Mica (e.g., muscovite) | Accessory mineral |
