NaF, Na2O, Na3N, C3N4
CaF2, CaO, Ca3N2, CaC2
AlF3, Al2O3, AlN, Al4C3
3 MgS + 2 HNO3 + 6 HCl = 3 MgCl2 + 3 S + 2 NO + 4 H2O