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 = 7.93 GPa, (Mg1.54Li.23Sc.23)Si2O6 _database_code_amcsd 0002098 CELL PARAMETERS: 9.0219 8.6711 5.0898 90.000 90.000 90.000 SPACE GROUP: P2_1cn X-RAY WAVELENGTH: 1.541838 Cell Volume: 398.174 Density (g/cm3): 3.361 MAX. ABS. INTENSITY / VOLUME**2: 8.250716910 RIR: 0.799 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 14.17 4.98 6.2517 1 1 0 2 20.23 4.28 4.3895 0 1 1 4 20.48 15.21 4.3355 0 2 0 2 22.53 4.63 3.9471 1 1 1 4 27.02 3.31 3.3005 0 2 1 4 28.37 22.52 3.1459 2 1 1 4 28.56 24.86 3.1259 2 2 0 2 28.80 100.00 3.0996 1 2 1 4 31.49 74.41 2.8413 3 1 0 2 32.53 2.74 2.7526 1 3 0 2 33.65 75.99 2.6636 2 2 1 4 35.72 3.39 2.5134 0 3 1 4 36.21 8.23 2.4809 3 1 1 4 36.69 48.55 2.4493 1 0 2 2 37.13 35.27 2.4212 1 3 1 4 38.18 3.97 2.3571 1 1 2 4 39.97 2.27 2.2555 4 0 0 1 40.58 1.11 2.2229 3 2 1 4 40.71 27.77 2.2165 2 0 2 2 41.11 25.45 2.1956 2 3 1 4 42.08 3.60 2.1474 2 1 2 4 45.20 4.80 2.0061 4 1 1 4 45.48 2.01 1.9944 0 4 1 4 45.99 1.84 1.9735 2 2 2 4 46.48 2.14 1.9539 2 4 0 2 46.64 12.69 1.9474 1 4 1 4 46.76 4.77 1.9427 3 0 2 2 47.12 18.60 1.9285 3 3 1 4 47.99 5.30 1.8957 3 1 2 4 48.73 1.89 1.8686 1 3 2 4 48.91 9.26 1.8622 4 2 1 4 50.00 9.01 1.8241 2 4 1 4 51.55 5.12 1.7728 3 2 2 4 51.75 4.45 1.7665 5 1 0 2 53.83 6.51 1.7030 1 5 0 2 54.35 10.93 1.6880 4 0 2 2 54.68 11.73 1.6787 4 3 1 4 55.02 1.57 1.6689 5 1 1 4 55.27 2.09 1.6621 3 4 1 4 55.46 7.02 1.6569 4 1 2 4 56.02 1.37 1.6415 0 5 1 4 56.18 2.41 1.6374 1 1 3 4 56.71 3.75 1.6233 1 4 2 4 57.02 1.41 1.6150 1 5 1 4 58.28 1.21 1.5832 5 2 1 4 58.41 18.43 1.5799 0 2 3 4 58.70 2.45 1.5729 4 2 2 4 59.11 2.99 1.5629 4 4 0 2 59.15 1.22 1.5620 2 1 3 4 59.39 4.35 1.5563 1 2 3 4 59.66 1.93 1.5498 2 4 2 4 61.69 5.00 1.5037 6 0 0 1 61.75 6.56 1.5023 3 5 0 2 63.17 2.67 1.4719 5 0 2 2 63.46 33.67 1.4658 5 3 1 4 63.59 16.44 1.4632 0 3 3 4 63.91 2.57 1.4567 3 1 3 4 64.18 5.30 1.4512 5 1 2 4 64.40 1.58 1.4467 3 4 2 4 64.48 18.29 1.4452 0 6 0 2 64.52 5.61 1.4443 1 3 3 4 64.69 1.42 1.4409 3 5 1 4 66.01 6.14 1.4154 1 5 2 4 66.90 3.76 1.3987 3 2 3 4 67.27 1.28 1.3918 2 3 3 4 68.58 1.65 1.3683 6 2 1 4 68.73 1.39 1.3658 2 5 2 4 70.48 6.13 1.3361 0 4 3 4 70.74 1.22 1.3318 4 4 2 4 71.37 1.43 1.3216 1 4 3 4 71.74 6.69 1.3157 3 3 3 4 73.10 6.25 1.2946 6 0 2 2 73.15 1.70 1.2937 3 5 2 4 73.37 17.24 1.2904 6 3 1 4 74.00 1.03 1.2810 2 4 3 4 74.04 9.37 1.2804 6 1 2 4 74.42 2.58 1.2748 7 1 0 2 75.45 3.18 1.2600 1 0 4 2 75.52 2.01 1.2590 0 1 4 4 76.13 1.42 1.2503 5 5 0 2 76.38 1.85 1.2469 1 1 4 4 76.54 9.20 1.2447 1 6 2 4 78.03 2.10 1.2247 2 0 4 2 78.95 4.11 1.2126 2 1 4 4 79.11 3.35 1.2106 2 6 2 4 79.19 4.25 1.2096 4 5 2 4 79.79 2.06 1.2019 1 5 3 4 83.05 1.38 1.1629 2 7 1 4 85.43 1.27 1.1365 5 3 3 4 85.92 1.65 1.1313 3 2 4 4 86.25 1.16 1.1277 8 0 0 1 86.78 3.36 1.1222 5 5 2 4 89.06 1.28 1.0993 4 1 4 4 89.22 3.80 1.0978 4 6 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.