Erbium Wyckoff R W G Crystal Structures 1 (1963) 7-83 Second edition. Interscience Publishers, New York, New York Sample at T = 43 K Hexagonal closest packed, hcp, structure _database_code_amcsd 0011173 CELL PARAMETERS: 3.5500 3.5500 5.5900 90.000 90.000 120.000 SPACE GROUP: P6_3/mmc X-RAY WAVELENGTH: 1.541838 Cell Volume: 61.010 Density (g/cm3): 9.103 MAX. ABS. INTENSITY / VOLUME**2: 639.2513011 RIR: 22.865 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 29.04 24.07 3.0744 1 0 0 6 32.02 24.68 2.7950 0 0 2 2 33.26 100.00 2.6939 1 0 1 12 43.77 14.75 2.0681 1 0 2 12 51.48 17.29 1.7750 1 1 0 6 57.87 17.24 1.5935 1 0 3 12 60.20 2.49 1.5372 2 0 0 6 61.93 18.00 1.4984 1 1 2 12 62.68 12.92 1.4822 2 0 1 12 66.96 2.26 1.3975 0 0 4 2 69.83 2.91 1.3469 2 0 2 12 74.60 2.30 1.2722 1 0 4 12 81.10 5.19 1.1858 2 0 3 12 85.32 2.95 1.1377 2 1 1 24 89.19 5.19 1.0980 1 1 4 12 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.