Gupeite Yu Z Acta Petrologica Mineralogica et Analytica 3 (1984) 231-238 Two new minerals gupeiite and xifengite in cosmic dusts from Yanshan Locality: cosmic dust found in placers, Yanshan, China _database_code_amcsd 0019594 5.670 5.670 5.670 90 90 90 Fm3m atom x y z occ Fe1 .5 .5 .5 .990 Ni1 .5 .5 .5 .009 Mn1 .5 .5 .5 .008 Fe2 .25 .25 .25 .990 Ni2 .25 .25 .25 .009 Mn2 .25 .25 .25 .008 Si 0 0 0