Rammelsbergite Kjekshus A, Rakke T, Andresen A Acta Chemica Scandinavica A28 (1974) 996-1000 Compounds of the marcasite type crystal structure. IX. Structural data for FeAs2, FeSe2, NiAs2, NiSb2, and CuSe2 Locality: synthetic _database_code_amcsd 0011937 4.7582 5.7949 3.5440 90 90 90 Pnnm atom x y z Ni 0 0 0 As .2017 .3691 0