AM_Pb(Al,Si)4O8 Formula: Pb2.198 (Si2.4 Al1.6) O8 Name: Pb(Al,Si)4O8 Unit cell: 9.414 9.414 2.75 90.0 90.0 90.0 , V=243.71 Space group: I141 (1)

Downs R T , Hazen R M , Finger L W , American Mineralogist , 80 (1995) p.937-940, Crystal chemistry of lead aluminosilicate hollandite: A new high-pressure, synthetic phase with octahedral Si