Geopolymers Based on Phosphoric Acid and Illito-Kaolinitic Clay

Table 4

The semiquantitative X-ray diffraction of the crystalline phases in the obtained geopolymers.

Si/P molar ratio	Semiquantitative X-ray diffraction
3.25
2.75
2.25

Green: illite, red: quartz, blue: hematite, and gray: aluminum phosphate.