Ullmannite Peacock M, Berry L University of Toronto Studies, Geological Series 44 (1940) 47-69 Roentgenographic observations on ore minerals _cod_database_code 1011234 _database_code_amcsd 0018100 5.724 5.724 5.724 90 90 90 P2_13 atom x y z occ Ni1 0 0 0 As1 .63 .63 .63 .1 Sb1 .63 .63 .63 .9 S1 .4 .4 .4