AM_Margarosanite Formula: Pb Ca2 Si3 O9 Name: Margarosanite Unit cell: 6.768 9.575 6.718 110.36 102.98 83.02 , V=397.27 Space group: P-1 (2)

Freed R L , Peacor D R , Zeitschrift fur Kristallographie , 128 (1969) p.213-228, Determination and refinement of the crystal structure of margarosanite,, PbCa2Si3O9, Locality: Parker Shaft, North Mine Hill, Franklin, New Jersey, USA