AM_Hardystonite_1
Formula: Ca2 Zn Si2 O7
Name: Hardystonite
Unit cell: 7.8279 7.8279 5.0138 90.0 90.0 90.0 , V=307.23
Space group: P-421M (113)

Louisnathan S J , Zeitschrift fur Kristallographie , 130 (1969) p.427-437, Refinement of the crystal structure of hardystonite, Ca2ZnSi2O7, Locality: Franklin, New Jersey, USA