As Na3 Beister H, Syassen K, Klein J Zeitschrift fur Naturforschung 45 (1990) 1388-1392 Phase transition of Na3As under pressure _cod_database_code 1008538 _database_code_amcsd 0016431 6.835 6.835 6.835 90 90 90 Fm3m atom x y z As1 0 0 0 Na1 .5 .5 .5 Na2 .25 .25 .25