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 = 1.11 GPa, (Mg1.54Li.23Sc.23)Si2O6 _database_code_amcsd 0002093 CELL PARAMETERS: 9.2351 8.7310 5.3216 90.000 90.000 90.000 SPACE GROUP: Pbcn X-RAY WAVELENGTH: 1.541838 Cell Volume: 429.089 Density (g/cm3): 3.119 MAX. ABS. INTENSITY / VOLUME**2: 12.28946571 RIR: 1.283 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.96 7.15 6.3445 1 1 0 4 19.22 1.06 4.6175 2 0 0 2 20.34 10.22 4.3655 0 2 0 2 27.54 22.27 3.2388 2 1 1 8 28.13 18.41 3.1722 2 2 0 4 28.15 100.00 3.1701 1 2 1 8 30.80 45.80 2.9032 3 1 0 4 32.25 4.24 2.7758 1 3 0 4 32.87 35.39 2.7248 2 2 1 8 35.10 25.51 2.5568 1 0 2 4 35.21 2.58 2.5486 3 1 1 8 36.51 8.43 2.4611 1 3 1 8 39.07 22.77 2.3054 2 0 2 4 39.63 1.06 2.2744 3 2 1 8 40.36 5.74 2.2345 2 3 1 8 40.47 3.99 2.2290 2 1 2 8 42.76 1.89 2.1148 3 3 0 4 43.99 4.70 2.0583 4 1 1 8 46.00 16.22 1.9729 1 4 1 8 46.19 18.14 1.9653 3 3 1 8 46.28 5.49 1.9616 3 1 2 8 47.73 4.07 1.9056 4 2 1 8 49.25 2.27 1.8503 2 4 1 8 49.89 2.98 1.8280 3 2 2 8 50.51 3.99 1.8070 5 1 0 4 52.47 4.30 1.7438 4 0 2 4 53.40 5.71 1.7158 1 5 0 4 53.51 8.23 1.7125 4 3 1 8 53.59 2.32 1.7100 4 1 2 8 53.65 1.36 1.7084 1 1 3 8 54.36 1.47 1.6876 0 4 2 4 55.34 4.13 1.6601 1 4 2 8 55.50 1.04 1.6556 3 3 2 8 55.95 17.88 1.6434 0 2 3 4 56.86 5.56 1.6194 4 2 2 8 58.16 3.10 1.5861 4 4 0 4 58.21 1.96 1.5850 2 4 2 8 59.17 2.23 1.5614 2 5 1 8 60.11 2.69 1.5392 6 0 0 2 61.00 1.89 1.5189 3 5 0 4 61.23 1.81 1.5137 3 1 3 8 62.01 16.92 1.4965 5 3 1 8 62.09 7.38 1.4949 5 1 2 8 62.10 9.17 1.4947 1 3 3 8 63.98 7.52 1.4552 0 6 0 2 64.64 4.04 1.4420 1 5 2 8 65.08 1.49 1.4332 5 2 2 8 66.80 2.19 1.4004 6 2 1 8 68.11 4.66 1.3766 0 4 3 4 69.12 5.05 1.3591 3 3 3 8 70.31 1.26 1.3388 4 2 3 8 70.71 2.79 1.3323 6 0 2 4 71.58 10.82 1.3182 6 3 1 8 71.65 5.47 1.3171 6 1 2 8 71.67 6.98 1.3168 1 0 4 4 72.45 1.87 1.3045 7 1 0 4 74.18 2.06 1.2784 2 0 4 4 75.12 6.78 1.2647 1 6 2 8 75.40 1.02 1.2607 1 2 4 8 77.33 2.46 1.2339 4 5 2 8 77.38 1.25 1.2333 1 5 3 8 77.58 5.27 1.2305 2 6 2 8 82.33 1.62 1.1712 5 3 3 8 83.95 1.03 1.1527 4 0 4 4 84.61 4.85 1.1453 5 5 2 8 84.84 2.52 1.1428 4 1 4 8 87.26 2.53 1.1173 4 6 2 8 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.