Cl3 H4 Hg N Harmsen E Zeitschrift fur Kristallographie 100 (1938) 208-211 The crystal structure of N H4 Hg Cl3 _cod_database_code 1010013 _database_code_amcsd 0016946 4.19 4.19 7.94 90 90 90 P-4 atom x y z Hg1 0 0 0 Cl1 .5 .5 0 Cl2 0 0 .2944 N1 .5 .5 .5