What is the difference between Sodalite and Modality?

The difference between sodalite and modality is that “sodalite” is a mineral of alkaline igneous and plutonic rocks that are low in silica, of the chemical composition of sodium aluminum silicate with chlorine, Na4Al3Si3O12Cl. Pink sodalite is sometimes called hackmanite. Sodalite and lazurite form the sodalite Group of silicate minerals and “modality” is the fact of being modal.