Enstatite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern Hugh-Jones D A, Chopelas A, Angel R J Physics and Chemistry of Minerals 24 (1997) 301-310 Tetrahedral compression in (Mg,Fe)SiO3 orthopyroxenes Sample: P = 2.50 GPa, synthetic En60 orthopyroxene CELL PARAMETERS: 18.23389 8.811420 5.183702 90.00000 90.00000 90.00000 SPACE GROUP: Pbca X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 13.99 18.67 6.3359 2 1 0 19.48 15.24 4.5585 4 0 0 20.17 5.89 4.4057 0 2 0 22.17 7.82 4.0120 2 1 1 26.56 3.94 3.3570 0 2 1 27.01 15.31 3.3015 1 2 1 27.97 14.46 3.1908 4 1 1 28.17 55.50 3.1679 4 2 0 28.33 76.39 3.1502 2 2 1 29.39 1.13 3.0390 6 0 0 30.42 63.47 2.9386 3 2 1 31.13 100.00 2.8729 6 1 0 31.67 26.63 2.8252 5 1 1 33.14 52.17 2.7031 4 2 1 34.61 1.11 2.5919 0 0 2 34.96 7.66 2.5661 1 0 2 35.47 67.10 2.5307 1 3 1 35.73 7.22 2.5128 6 1 1 36.02 55.02 2.4931 2 0 2 36.38 1.64 2.4690 4 3 0 36.37 35.50 2.4699 5 2 1 36.51 32.58 2.4606 2 3 1 36.47 1.61 2.4637 1 1 2 37.73 19.33 2.3841 3 0 2 39.14 4.07 2.3014 3 1 2 40.01 1.33 2.2531 4 0 2 40.06 6.10 2.2503 7 1 1 40.46 3.63 2.2291 4 3 1 41.35 2.27 2.1829 4 1 2 42.81 2.87 2.1120 6 3 0 42.79 40.67 2.1126 5 0 2 43.13 5.62 2.0968 3 2 2 43.22 31.60 2.0928 5 3 1 43.99 10.05 2.0580 7 2 1 44.07 16.62 2.0544 5 1 2 44.62 3.99 2.0303 8 1 1 44.76 2.68 2.0244 8 2 0 44.98 7.97 2.0150 1 4 1 45.19 1.06 2.0060 4 2 2 45.73 5.61 1.9834 4 4 0 45.84 11.09 1.9790 2 4 1 46.41 42.33 1.9559 6 3 1 47.25 1.91 1.9232 3 4 1 47.22 1.03 1.9244 6 1 2 48.25 11.43 1.8857 8 2 1 49.17 2.78 1.8524 4 4 1 49.60 12.66 1.8373 7 0 2 50.70 5.38 1.8000 6 2 2 51.07 1.36 1.7877 4 3 2 51.14 3.58 1.7856 10 1 0 51.56 7.30 1.7720 5 4 1 52.90 17.54 1.7303 2 5 0 53.40 1.35 1.7151 5 3 2 53.88 5.15 1.7010 8 3 1 54.06 7.49 1.6957 7 2 2 54.60 6.72 1.6802 8 1 2 54.91 1.60 1.6714 1 4 2 55.07 2.41 1.6670 2 1 3 55.66 4.71 1.6508 2 4 2 56.01 3.17 1.6412 2 5 1 56.31 4.14 1.6332 3 1 3 56.89 1.43 1.6179 3 4 2 57.25 17.59 1.6086 0 2 3 57.49 15.37 1.6024 1 2 3 57.59 1.15 1.5999 7 4 1 57.73 10.44 1.5962 9 0 2 58.08 16.28 1.5876 9 3 1 58.22 1.98 1.5840 8 4 0 58.76 3.32 1.5706 9 1 2 58.92 1.05 1.5668 4 5 1 60.73 10.85 1.5245 6 5 0 61.05 2.46 1.5172 5 5 1 60.95 10.64 1.5195 12 0 0 61.79 2.77 1.5007 9 2 2 62.46 1.12 1.4863 11 2 1 62.55 31.75 1.4843 10 3 1 62.55 34.19 1.4844 1 3 3 62.72 1.51 1.4807 6 1 3 63.30 26.37 1.4686 0 6 0 63.14 1.94 1.4718 5 2 3 63.26 1.43 1.4693 6 4 2 63.24 7.14 1.4698 2 3 3 64.07 1.38 1.4527 1 5 2 64.38 1.17 1.4465 3 3 3 65.88 13.10 1.4172 3 5 2 66.32 1.04 1.4087 1 6 1 66.20 1.42 1.4109 7 4 2 66.52 1.26 1.4050 7 5 1 66.54 1.09 1.4046 10 4 0 66.98 16.44 1.3965 11 0 2 67.30 25.81 1.3907 11 3 1 67.65 2.04 1.3843 12 2 1 67.96 4.89 1.3788 5 3 3 67.93 6.09 1.3792 11 1 2 68.53 5.05 1.3687 7 2 3 69.05 5.00 1.3596 0 4 3 69.27 2.50 1.3558 1 4 3 69.42 3.07 1.3533 5 5 2 70.36 8.72 1.3373 6 3 3 71.01 1.43 1.3268 3 4 3 72.31 12.06 1.3060 12 3 1 72.68 1.18 1.3003 9 1 3 72.92 9.62 1.2966 12 1 2 72.97 1.23 1.2959 0 0 4 73.08 1.57 1.2942 13 2 1 73.16 3.55 1.2929 7 3 3 73.18 5.68 1.2927 1 0 4 73.46 3.55 1.2884 14 1 0 74.09 3.05 1.2790 1 1 4 74.58 1.12 1.2718 7 5 2 75.03 12.01 1.2654 2 6 2 76.08 7.38 1.2504 3 6 2 76.08 1.20 1.2504 14 1 1 76.36 7.46 1.2465 4 0 4 77.24 1.81 1.2345 8 6 0 77.74 4.45 1.2278 8 5 2 78.13 1.37 1.2226 2 5 3 79.17 2.45 1.2091 3 5 3 79.14 2.26 1.2096 5 1 4 79.43 5.17 1.2058 5 6 2 81.28 7.67 1.1831 9 5 2 81.42 1.41 1.1813 6 1 4 81.80 2.04 1.1768 5 2 4 83.27 1.00 1.1597 5 7 1 84.10 1.45 1.1503 7 1 4 84.39 3.29 1.1471 7 6 2 85.08 2.87 1.1396 16 0 0 86.30 3.12 1.1266 8 0 4 88.45 1.48 1.1046 12 2 3 89.49 2.49 1.0945 11 5 2 89.49 2.49 1.0945 11 5 2 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.