Umangite Milman V Acta Crystallographica B58 (2002) 437-447 Klockmannite, CuSe: structure, properties and phase stability from ab initio modeling Locality: hypothetical structure calculated using DFT _database_code_amcsd 0009926 6.308 6.308 4.350 90 90 90 P-42_1m atom x y z Cu1 0 0 0 Cu2 .6430 .8570 .2475 Se .2655 .7655 .2586