Protopyroxene Yang H, Finger L W, Conrad P G, Prewitt C T, Hazen R M American Mineralogist 84 (1999) 245-256 A new pyroxene structure at high pressure: Single-crystal X-ray and Raman study of the Pbcn - P2_1cn phase transition in protopyroxene Sample at P = 2.50 GPa, (Mg1.54Li.23Sc.23)Si2O6 _database_code_amcsd 0002095 CELL PARAMETERS: 9.1167 8.7857 5.1837 90.000 90.000 90.000 SPACE GROUP: P2_1cn X-RAY WAVELENGTH: 1.541838 Cell Volume: 415.197 Density (g/cm3): 3.224 MAX. ABS. INTENSITY / VOLUME**2: 8.827005749 RIR: 0.892 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 14.00 5.01 6.3262 1 1 0 2 19.89 2.37 4.4645 0 1 1 4 20.21 15.18 4.3928 0 2 0 2 22.17 4.12 4.0096 1 1 1 4 26.60 3.46 3.3513 0 2 1 4 27.97 23.35 3.1896 2 1 1 4 28.21 26.18 3.1631 2 2 0 2 28.37 100.00 3.1455 1 2 1 4 31.14 68.67 2.8720 3 1 0 2 32.10 3.77 2.7882 1 3 0 2 33.18 65.75 2.7001 2 2 1 4 35.20 2.02 2.5498 0 3 1 4 35.74 6.82 2.5122 3 1 1 4 36.03 40.66 2.4931 1 0 2 2 36.59 30.17 2.4556 1 3 1 4 37.50 2.91 2.3984 1 1 2 4 39.54 1.57 2.2792 4 0 0 1 40.02 26.81 2.2531 2 0 2 2 40.54 19.20 2.2253 2 3 1 4 41.37 3.75 2.1825 2 1 2 4 44.64 4.05 2.0300 4 1 1 4 44.82 1.87 2.0224 0 4 1 4 45.23 1.42 2.0048 2 2 2 4 45.86 1.60 1.9787 2 4 0 2 45.97 13.03 1.9744 1 4 1 4 46.02 3.24 1.9720 3 0 2 2 46.49 16.15 1.9533 3 3 1 4 47.24 4.88 1.9241 3 1 2 4 47.92 1.93 1.8984 1 3 2 4 48.29 8.63 1.8846 4 2 1 4 49.29 8.42 1.8486 2 4 1 4 50.75 4.72 1.7991 3 2 2 4 51.15 1.33 1.7858 2 3 2 4 51.17 4.41 1.7853 5 1 0 2 53.08 6.71 1.7254 1 5 0 2 53.54 9.96 1.7115 4 0 2 2 53.96 10.32 1.6993 4 3 1 4 54.50 1.65 1.6836 3 4 1 4 54.63 5.56 1.6800 4 1 2 4 55.10 2.14 1.6668 1 1 3 4 55.78 4.56 1.6481 1 4 2 4 56.19 1.53 1.6371 1 5 1 4 57.30 20.45 1.6080 0 2 3 4 57.82 3.04 1.5948 4 2 2 4 58.27 2.76 1.5835 1 2 3 4 58.35 3.07 1.5816 4 4 0 2 58.70 2.01 1.5728 2 4 2 4 60.90 4.26 1.5212 3 5 0 2 60.98 4.76 1.5195 6 0 0 1 62.26 1.76 1.4913 5 0 2 2 62.40 9.45 1.4882 0 3 3 4 62.64 29.96 1.4831 5 3 1 4 62.76 2.51 1.4806 3 1 3 4 63.25 5.95 1.4703 5 1 2 4 63.32 6.42 1.4687 1 3 3 4 63.39 1.22 1.4674 3 4 2 4 63.54 15.09 1.4643 0 6 0 2 63.76 1.90 1.4596 3 5 1 4 64.93 5.20 1.4362 1 5 2 4 65.70 1.91 1.4213 3 2 3 4 67.61 1.03 1.3856 2 5 2 4 67.71 1.50 1.3839 6 2 1 4 69.18 6.77 1.3580 0 4 3 4 70.45 7.69 1.3365 3 3 3 4 71.98 1.31 1.3119 3 5 2 4 72.05 4.42 1.3108 6 0 2 2 72.40 15.23 1.3053 6 3 1 4 72.64 1.18 1.3015 2 4 3 4 72.97 9.04 1.2965 6 1 2 4 73.51 2.40 1.2883 7 1 0 2 73.86 3.42 1.2830 1 0 4 2 73.93 1.35 1.2821 0 1 4 4 74.78 2.58 1.2696 1 1 4 4 75.08 1.38 1.2652 5 5 0 2 75.26 9.37 1.2626 1 6 2 4 76.41 2.91 1.2465 2 0 4 2 77.31 2.65 1.2342 2 1 4 4 77.79 3.89 1.2278 2 6 2 4 77.92 3.94 1.2260 4 5 2 4 78.31 2.30 1.2209 1 5 3 4 80.01 1.09 1.1992 2 2 4 4 81.72 1.21 1.1784 2 7 1 4 83.93 1.55 1.1529 5 3 3 4 84.15 1.43 1.1505 3 2 4 4 85.14 1.01 1.1396 8 0 0 1 85.38 3.71 1.1370 5 5 2 4 86.36 1.07 1.1266 4 0 4 2 87.25 1.28 1.1174 4 1 4 4 87.71 3.62 1.1127 4 6 2 4 88.54 1.71 1.1044 6 2 3 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.