AM_Thallium_1 Formula: Tl Name: Thallium Unit cell: 3.456 3.456 5.525 90.0 90.0 120.0 , V=57.15 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 = 297 K, Hexagonal closest packed, hcp, structure