Krypton Sonnenblick Y, Alexander E, Kalman Z H, Steinberger I T Chemical Physics Letters 52 (1977) 276-278 Hexagonal close packed krypton and xenon Locality: synthetic Sample: at T = 26 K _database_code_amcsd 0012190 4.00 4.00 6.53 90 90 120 P6_3/mmc atom x y z Kr 1/3 2/3 .25