Geopolymers Based on Phosphoric Acid and Illito-Kaolinitic Clay

Figure 1

XRD patterns of raw and calcined Medenine clay at 700°C for 5 hours. Q: quartz (00-046-1045), K: kaolinite (00-001-0527), I: illite (00-024-0495), H: hematite (00-024-0072), G: gypsum (04-009-3817), M: muscovite (00-001-1098), and D: dolomite (01-075-1655).