Compound	yield of the treatment performed (η)
Compound	Sand sample of Maféré
Silica	η_(silica) = [T_{(silica)ASS,1} − T_{(silica)ASS,0}]/[100 − T_{(silica)ASS,0)}] × 100
Iron oxide	η_(iron) = [T_(iron)ASS,1 − T_(iron)ASS,0]/[0 − T_(iron)ASS,0] × 100
Alumina	η_(alumina) = [T_{(alumina)ASS,1} − T_{(alumina)ASS,0}]/[0 − T_{(alumina)ASS,0}] × 100