Sodium Barrett C S Acta Crystallographica 9 (1956) 671-677 X-ray study of the alkali metals at low temperatures Locality: synthetic Sample: at T = 5 K Note: lattice parameters are average of 4 values _database_code_amcsd 0009182 3.767 3.767 6.154 90 90 120 P6_3/mmc atom x y z Na 1/3 2/3 .25