Fayalite Diffraction data computed using the structute from the paper listed below, along with the cell parameters refined from single crystal data of R070157 Birle J D, Gibbs G V, Moore P B, Smith J V American Mineralogist 53 (1968) 807-824 Crystal structures of natural olivines CELL PARAMETERS: 4.8177 10.4770 6.0922 90.000 90.000 90.000 SPACE GROUP: Pbnm ATOM X Y Z OCCUPANCY ISO(B) Fe 0.00000 0.00000 0.00000 0.922 0.410 Mg 0.00000 0.00000 0.00000 0.039 0.410 Mn 0.00000 0.00000 0.00000 0.037 0.410 Ca 0.00000 0.00000 0.00000 0.002 0.410 Fe 0.98608 0.28004 0.25000 0.922 0.360 Mg 0.98608 0.28004 0.25000 0.039 0.360 Mn 0.98608 0.28004 0.25000 0.037 0.360 Ca 0.98608 0.28004 0.25000 0.002 0.360 Si 0.43070 0.09723 0.25000 1.000 0.270 O 0.76683 0.09197 0.25000 1.000 0.430 O 0.21027 0.45308 0.25000 1.000 0.480 O 0.28806 0.16532 0.03626 1.000 0.520 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 0.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 4 +/- 9 +/- 5 MAX. ABS. INTENSITY / VOLUME**2: 21.67826941 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 16.93 8.34 5.2385 0 2 0 20.29 9.09 4.3771 1 1 0 22.38 9.26 3.9720 0 2 1 23.54 4.38 3.7789 1 0 1 25.05 59.96 3.5547 1 1 1 25.11 5.45 3.5461 1 2 0 29.14 3.40 3.0647 1 2 1 29.32 6.02 3.0461 0 0 2 31.64 92.07 2.8276 1 3 0 34.05 32.61 2.6333 0 2 2 34.23 11.10 2.6193 0 4 0 34.98 65.11 2.5648 1 3 1 35.92 100.00 2.5002 1 1 2 37.33 15.39 2.4088 2 0 0 37.37 13.45 2.4063 0 4 1 38.34 6.40 2.3476 2 1 0 38.98 12.14 2.3106 1 2 2 39.15 11.65 2.3011 1 4 0 41.21 6.53 2.1906 2 1 1 43.68 6.05 2.0723 1 3 2 43.96 1.64 2.0597 2 2 1 45.68 2.31 1.9860 0 4 2 47.31 2.75 1.9215 1 5 0 49.48 10.51 1.8421 1 1 3 49.76 6.31 1.8325 1 5 1 51.41 72.13 1.7774 2 2 2 51.55 21.87 1.7730 2 4 0 51.88 2.22 1.7622 1 2 3 53.85 11.61 1.7024 2 4 1 54.68 12.43 1.6786 0 6 1 55.73 15.44 1.6494 1 3 3 56.64 17.45 1.6252 1 5 2 57.42 7.17 1.6049 0 4 3 58.11 4.19 1.5874 3 1 0 60.25 5.72 1.5361 3 1 1 60.26 1.11 1.5358 2 1 3 60.28 1.24 1.5354 3 2 0 60.41 3.40 1.5324 2 4 2 60.50 2.38 1.5303 2 5 1 60.82 20.87 1.5230 0 0 4 61.18 24.99 1.5149 0 6 2 62.37 1.13 1.4888 3 2 1 63.79 6.03 1.4590 3 3 0 65.28 13.51 1.4293 1 7 0 65.82 7.63 1.4189 3 3 1 66.41 10.17 1.4077 3 1 2 67.06 1.64 1.3957 1 5 3 68.08 3.26 1.3772 2 6 1 68.43 6.61 1.3711 3 2 2 68.54 1.45 1.3691 3 4 0 70.19 13.26 1.3409 1 3 4 70.50 2.61 1.3358 3 4 1 70.51 2.28 1.3356 2 4 3 71.22 4.71 1.3240 0 6 3 71.68 2.66 1.3166 0 4 4 73.58 5.61 1.2873 2 0 4 73.91 4.93 1.2824 2 6 2 74.22 1.01 1.2777 2 1 4 76.11 1.43 1.2506 3 1 3 76.34 1.49 1.2475 2 5 3 79.59 4.48 1.2044 4 0 0 79.70 1.09 1.2031 0 8 2 80.46 1.17 1.1936 1 5 4 81.18 3.79 1.1849 3 3 3 81.94 7.92 1.1758 3 5 2 82.11 1.17 1.1738 1 1 5 82.16 1.37 1.1732 2 7 2 83.28 1.88 1.1603 2 6 3 83.71 7.09 1.1553 2 4 4 84.14 2.69 1.1506 2 8 0 85.55 2.04 1.1352 3 4 3 85.98 1.98 1.1306 2 8 1 87.09 3.87 1.1190 1 3 5 87.61 1.99 1.1137 4 1 2 89.09 1.66 1.0990 3 1 4 89.47 5.92 1.0953 4 2 2 89.51 5.01 1.0949 3 7 0 89.58 2.64 1.0943 4 4 0 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.