Table 1: Mineralogical composition of the phosphate.

Mineralogical characteristicsPercentages (%wt)

Apatite, Ca10(PO4)6F290
Calcite, CaCO32.7
Dolomite, CaMgCO31.7
Quartz, SiO21.4
Organic matter2.8
Amorphous silica0.2
Pyrite0.3