CaO.SiO2\mathrm{CaO} . \mathrm{SiO}_{2}CaO.SiO2
CaO⋅Al2O3\mathrm{CaO} \cdot \mathrm{Al}_{2} \mathrm{O}_{3}CaO⋅Al2O3
CaO⋅Fe2O3\mathrm{CaO} \cdot \mathrm{Fe}_{2} \mathrm{O}_{3}CaO⋅Fe2O3
Al2O3\mathrm{Al}_{2} \mathrm{O}_{3}Al2O3