Pigeonite Camara F, Carpenter M A, Domeneghetti M C, Tazzoli V Physics and Chemistry of Minerals 29 (2002) 331-340 Non-convergent ordering and displacive phase transition in pigeonite: in situ HT XRD study Sample: hgd, T = 650 C Locality: from rhyodacite, Parana, Brazil _database_code_amcsd 0008638 CELL PARAMETERS: 9.8010 9.0080 5.2960 90.000 109.010 90.000 SPACE GROUP: P2_1/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 442.070 Density (g/cm3): 3.476 MAX. ABS. INTENSITY / VOLUME**2: 11.51405810 RIR: 1.079 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.71 3.56 6.4591 1 1 0 4 19.16 9.01 4.6332 2 0 0 2 19.82 9.83 4.4805 -1 1 1 4 20.29 1.19 4.3765 0 1 1 4 26.62 17.63 3.3486 0 2 1 4 27.62 49.35 3.2295 2 2 0 4 29.31 100.00 3.0474 -2 2 1 4 30.30 38.35 2.9501 -3 1 1 4 30.60 44.32 2.9218 3 1 0 4 34.55 44.33 2.5958 -1 3 1 4 35.87 45.64 2.5036 0 0 2 2 36.37 25.08 2.4705 2 2 1 4 36.99 1.45 2.4304 -2 3 1 4 37.79 3.57 2.3804 1 3 1 4 40.24 12.12 2.2409 3 1 1 4 40.26 1.93 2.2402 -2 2 2 4 40.26 1.04 2.2402 1 0 2 2 41.26 5.25 2.1882 0 2 2 4 41.54 8.39 2.1739 1 1 2 4 41.73 32.65 2.1643 -3 3 1 4 41.96 2.69 2.1530 3 3 0 4 42.33 7.03 2.1352 -4 2 1 4 43.75 15.44 2.0692 -4 0 2 2 43.95 2.79 2.0601 4 2 0 4 44.09 10.41 2.0538 0 4 1 4 44.74 3.85 2.0254 2 4 0 4 45.88 4.25 1.9781 -2 4 1 4 46.51 9.17 1.9526 2 0 2 2 49.75 2.28 1.8327 3 3 1 4 50.26 3.30 1.8153 5 1 0 4 50.85 1.64 1.7955 1 3 2 4 50.98 8.11 1.7915 2 2 2 4 50.99 1.96 1.7911 2 4 1 4 51.69 10.36 1.7685 1 5 0 4 52.72 2.60 1.7364 4 2 1 4 53.50 1.74 1.7129 -1 1 3 4 54.03 3.62 1.6972 -2 4 2 4 54.25 3.06 1.6909 -3 1 3 4 54.83 1.85 1.6743 0 4 2 4 55.18 4.10 1.6645 3 1 2 4 55.98 16.85 1.6426 -2 2 3 4 56.07 22.27 1.6401 -5 3 1 4 59.18 5.34 1.5612 -6 0 2 2 59.21 3.52 1.5605 -3 5 1 4 59.39 3.66 1.5562 3 5 0 4 59.89 4.72 1.5444 6 0 0 2 60.91 1.18 1.5211 -2 3 3 4 61.46 11.92 1.5086 -1 3 3 4 61.79 9.84 1.5013 0 6 0 2 62.15 2.71 1.4935 -3 3 3 4 62.91 4.21 1.4773 4 0 2 2 63.01 1.69 1.4753 2 4 2 4 63.02 3.06 1.4751 -6 2 2 4 65.18 4.95 1.4312 -3 5 2 4 65.69 2.01 1.4215 3 5 1 4 66.61 1.23 1.4039 1 5 2 4 66.97 21.34 1.3973 5 3 1 4 67.44 2.73 1.3888 -2 4 3 4 67.82 3.75 1.3819 1 3 3 4 67.88 1.01 1.3807 -7 1 1 4 68.95 1.58 1.3620 2 2 3 4 69.45 6.06 1.3534 -7 1 2 4 69.77 4.26 1.3479 -5 3 3 4 72.12 1.66 1.3097 7 1 0 4 72.39 1.98 1.3054 -3 1 4 4 73.32 4.17 1.2912 -4 0 4 2 73.56 9.23 1.2876 0 6 2 4 73.58 1.33 1.2873 5 1 2 4 74.87 1.48 1.2682 -2 2 4 4 75.45 1.12 1.2599 4 6 0 4 76.03 2.10 1.2518 0 0 4 2 77.32 5.80 1.2340 3 5 2 4 78.75 1.53 1.2152 -4 6 2 4 81.74 1.66 1.1781 -6 0 4 2 88.32 1.16 1.1066 -8 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.