AM_Grischunite Formula: As6 Mn5 Fe Ca2.121 Na.73 O26 H4 Name: Grischunite Unit cell: 12.855 13.487 12.047 90.0 90.0 90.0 , V=2088.65 Space group: PCAB (61)

Bianchi R , Pilati T , Mannucci G , American Mineralogist , 72 (1987) p.1225-1229, Crystal structure of grischunite