AM_Orpiment Formula: As2 S3 Name: Orpiment Unit cell: 11.475 9.577 4.256 90.0 90.68 90.0 , V=467.68 Space group: P121/N1 (14)

Mullen D J E , Nowacki W , Zeitschrift fur Kristallographie , 136 (1972) p.48-65, Refinement of the crystal structures of realgar, AsS and orpiment, As2S3, Locality: Lengenbach quarry, Binnatal, Switzerland