Thallium Olsen J S, Gerward L, Steenstrup S, Johnson E Journal of Applied Crystallography 27 (1994) 1002-1005 A high-pressure study of thallium Note: Hexagonal closest-packed Locality: Synthetic _database_code_amcsd 0020616 3.463 3.463 5.539 90 90 120 P6_3/mmc atom x y z Tl 1/3 2/3 .25