Helium Schuch A F, Mills R L Physical Review Letters 6 (1961) 596-597 New allotropic form of He3 Locality: synthetic Sample: at T = 15.98 K & P = .136 GPa _database_code_amcsd 0015272 CELL PARAMETERS: 3.0460 3.0460 4.9860 90.000 90.000 120.000 SPACE GROUP: P6_3/mmc X-RAY WAVELENGTH: 1.541838 Cell Volume: 40.063 Density (g/cm3): 0.332 MAX. ABS. INTENSITY / VOLUME**2: 0.6262539153 RIR: 0.615 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 33.98 25.95 2.6379 1 0 0 6 36.03 28.40 2.4930 0 0 2 2 38.61 100.00 2.3317 1 0 1 12 50.36 11.67 1.8119 1 0 2 12 60.82 9.93 1.5230 1 1 0 6 66.49 9.70 1.4062 1 0 3 12 71.53 1.13 1.3190 2 0 0 6 72.76 8.33 1.2997 1 1 2 12 74.40 5.61 1.2751 2 0 1 12 76.41 1.10 1.2465 0 0 4 2 82.79 1.13 1.1658 2 0 2 12 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.