Citation: Hassan, I.; Peterson, R. C.; Grundy, H. D. (1985). The structure of lazurite, ideally Na6Ca2(Al6Si6O24)S2, a member of the sodalite group. Acta Crystallographica, Section C, 41, pp. 827-832.
Formula: Al2.97 Ca0.8 Mg0.36 Na3.12 O15.12 S Si3.03