AM_Thallium Formula: Tl Name: Thallium Unit cell: 3.438 3.438 5.478 90.0 90.0 120.0 , V=56.07 Space group: P63/MMC (194)

Wyckoff R W G , Crystal Structures , 1 (1963) p.7-83, Second edition. Interscience Publishers, New York, New York, Sample at T = 5 K, Hexagonal closest packed, hcp, structure