Gypsum Comodi P, Nazzareni S, Zanazzi P F, Speziale S American Mineralogist 93 (2008) 1530-1537 High-pressure behavior of gypsum: A single-crystal X-ray study Locality: Valle di Caramanico, Abruzzo, Italy Note: P = 0.33 GPa _database_code_amcsd 0004653 CELL PARAMETERS: 6.2690 15.1400 5.6650 90.000 114.100 90.000 SPACE GROUP: C2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 490.813 Density (g/cm3): 2.388 MAX. ABS. INTENSITY / VOLUME**2: 11.82393689 RIR: 1.612 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 11.69 75.22 7.5700 0 2 0 2 20.80 100.00 4.2700 0 2 1 4 23.50 3.21 3.7851 1 3 0 4 23.50 10.61 3.7850 0 4 0 2 28.20 5.86 3.1640 1 1 1 4 29.24 79.08 3.0543 0 4 1 4 31.22 54.16 2.8654 -2 2 1 4 31.26 2.20 2.8613 2 0 0 2 32.19 13.81 2.7811 -1 1 2 4 33.48 40.68 2.6765 2 2 0 4 34.67 5.89 2.5872 -1 5 1 4 34.69 1.22 2.5856 0 0 2 2 36.08 11.71 2.4896 -2 0 2 2 36.41 1.86 2.4679 -1 3 2 4 36.73 8.53 2.4468 0 2 2 4 37.53 2.03 2.3963 -2 4 1 4 40.82 17.90 2.2108 1 5 1 4 42.33 1.31 2.1350 0 4 2 4 43.51 16.60 2.0800 -2 4 2 4 43.61 4.28 2.0753 2 2 1 4 43.77 5.76 2.0681 -3 1 1 4 43.79 8.12 2.0673 -1 5 2 4 44.35 6.58 2.0426 1 1 2 4 45.74 3.77 1.9838 -1 7 1 4 46.59 4.45 1.9492 -3 1 2 4 48.08 16.83 1.8925 2 6 0 4 48.08 2.37 1.8925 0 8 0 2 48.56 13.77 1.8747 2 4 1 4 48.94 3.37 1.8612 -1 1 3 4 50.54 14.98 1.8059 0 6 2 4 50.89 4.25 1.7944 -2 2 3 4 51.20 1.50 1.7843 3 3 0 4 51.42 1.67 1.7772 0 8 1 4 51.57 9.36 1.7722 -2 6 2 4 53.80 1.54 1.7041 1 5 2 4 54.60 3.12 1.6807 0 2 3 4 55.35 8.21 1.6599 -2 4 3 4 56.08 3.85 1.6400 2 6 1 4 56.92 7.03 1.6177 2 0 2 2 57.04 3.17 1.6147 -2 8 1 4 57.07 2.36 1.6139 1 9 0 4 58.33 1.12 1.5820 2 2 2 4 58.47 1.11 1.5785 2 8 0 4 58.54 1.72 1.5767 -3 3 3 4 60.64 1.99 1.5271 0 8 2 4 61.07 2.10 1.5175 3 3 1 4 61.55 1.24 1.5066 -2 8 2 4 62.30 1.05 1.4904 -2 6 3 4 64.01 1.42 1.4546 -3 7 2 4 64.97 5.10 1.4353 -4 4 1 4 65.21 2.18 1.4306 4 0 0 2 66.04 3.45 1.4146 -2 0 4 2 66.91 2.63 1.3983 -4 2 3 4 67.76 1.13 1.3830 -1 1 4 4 69.06 5.56 1.3601 -2 10 1 4 70.35 1.10 1.3382 4 4 0 4 70.74 1.50 1.3318 -4 4 3 4 71.06 1.44 1.3266 -1 11 1 4 71.35 1.72 1.3218 -2 8 3 4 71.51 2.52 1.3194 -4 6 2 4 74.45 2.35 1.2744 0 8 3 4 76.28 1.20 1.2483 2 2 3 4 76.53 1.20 1.2448 -4 0 4 2 76.55 1.49 1.2445 4 6 0 4 76.93 1.54 1.2394 2 10 1 4 77.12 3.35 1.2367 4 2 1 4 77.65 1.88 1.2297 2 8 2 4 77.75 2.32 1.2283 -4 2 4 4 79.92 2.21 1.2003 2 4 3 4 79.97 2.22 1.1997 -4 8 1 4 80.10 2.64 1.1981 -4 8 2 4 82.07 1.19 1.1742 -5 3 3 4 83.79 1.48 1.1544 2 12 0 4 84.14 2.45 1.1506 0 6 4 4 84.99 1.09 1.1412 4 8 0 4 85.33 4.97 1.1375 0 10 3 4 85.67 1.39 1.1339 0 12 2 4 85.75 1.39 1.1331 -2 8 4 4 87.35 1.32 1.1164 -4 6 4 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.