AM_Melanophlogite_2 Formula: N2.34 C1.66 Si23 O46 Name: Melanophlogite Unit cell: 13.436 13.436 13.436 90.0 90.0 90.0 , V=2425.55 Space group: PM3N (223)

Gies H , Zeitschrift fur Kristallographie , 164 (1983) p.247-257, Studies on clathrasils. III. Crystal structure of, melanophlogite, a natural clathrate compound of silica