AM_Genthelvite_1
Formula:
Zn4 O12 Be3 Si3 S
Name:
Genthelvite
Unit cell:
8.149 8.149 8.149 90.0 90.0 90.0 , V=541.14
Space group:
P-43N (218)
Hassan I , Grundy H D , American Mineralogist , 70 (1985) p.186-192, The crystal structures of helvite group minerals, (MnFeZn)8(Be6Si6O24)S2