Si3N4 Yang P, Fun H-K, Rahman I A, Saleh M I Ceramics International 21 (1995) 137-142 Two phase refinements of the structures of a-Si3N4 and B-Si3N4 made from rice husk by Rietveld analysis Sample: Beta phase _database_code_amcsd 0012186 CELL PARAMETERS: 7.6093 7.6093 2.9079 90.000 90.000 120.000 SPACE GROUP: P6_3/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 145.814 Density (g/cm3): 3.195 MAX. ABS. INTENSITY / VOLUME**2: 12.03874020 RIR: 1.227 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.44 33.62 6.5898 1 0 0 6 23.38 32.48 3.8047 1 1 0 6 27.06 100.00 3.2949 2 0 0 6 33.69 94.14 2.6604 1 0 1 12 36.06 97.66 2.4907 2 1 0 6 38.98 3.81 2.3104 1 1 1 12 41.09 1.06 2.1966 3 0 0 6 41.41 30.55 2.1803 2 0 1 12 47.81 8.14 1.9023 2 2 0 6 48.10 4.36 1.8917 2 1 1 12 49.90 12.05 1.8277 1 3 0 6 52.19 41.56 1.7527 3 0 1 12 57.93 9.75 1.5919 2 2 1 12 59.76 3.01 1.5474 1 3 1 12 59.76 2.81 1.5474 3 1 1 12 61.32 6.29 1.5118 3 2 0 6 61.32 9.60 1.5118 2 3 0 6 64.04 15.08 1.4540 0 0 2 2 64.84 5.25 1.4380 1 4 0 6 64.84 3.01 1.4380 4 1 0 6 65.07 1.70 1.4334 4 0 1 12 69.17 1.69 1.3582 1 1 2 12 70.16 40.92 1.3414 2 3 1 12 70.16 5.56 1.3414 3 2 1 12 70.84 8.00 1.3302 2 0 2 12 71.60 5.08 1.3180 5 0 0 6 73.46 19.16 1.2890 4 1 1 12 74.87 5.95 1.2682 3 3 0 6 75.75 18.09 1.2557 2 1 2 12 79.91 1.86 1.2004 5 0 1 12 81.29 2.00 1.1836 5 1 0 6 83.73 3.00 1.1552 2 2 2 12 84.66 4.15 1.1448 2 4 1 12 85.30 3.84 1.1378 1 3 2 12 89.37 5.79 1.0962 5 1 1 12 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.