AM_Arsenopyrite
Formula: Fe As S
Name: Arsenopyrite
Unit cell: 5.744 5.675 5.785 90.0 112.28 90.0 , V=174.50
Space group: P1-11 (1)

Morimoto N , Clark L A , American Mineralogist , 46 (1961) p.1448-1469, Arsenopyrite crystal-chemical relations, From Freiberg, Germany