C3H8O3\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}_{3}C3H8O3
CaCO3⋅MgCO3\mathrm{CaCO}_{3} \cdot \mathrm{MgCO}_{3}CaCO3⋅MgCO3
3MgO.4SiO2⋅H2O3 \mathrm{MgO} .4 \mathrm{SiO}_{2} \cdot \mathrm{H}_{2} \mathrm{O}3MgO.4SiO2⋅H2O
Na2 B4O7⋅10H2O\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7} \cdot 10 \mathrm{H}_{2} \mathrm{O}Na2 B4O7⋅10H2O