Lithium Berliner R, Fajen O, Smith H G, Hitterman R L Physical Review B40 (1989) 12086-12097 Neutron powder-diffraction studies of lithium, sodium and potassium metal Note: Hexagonal closest-packed, T = 20 K Locality: Synthetic _database_code_amcsd 0020602 3.1010 3.1010 22.7649 90 90 120 R-3m atom x y z Li1 0 0 0 Li2 0 0 .222