Ca2(Mg.55Fe.45)Si2O7 Kusaka K, Hagiya K, Ohmasa M, Okano Y, Mukai M, Iishi K, Haga N Physics and Chemistry of Minerals 28 (2001) 150-166 Determination of structures of Ca2CoSi2O7, Ca2MgSi2O7, and Ca2(Mg.55Fe.45)Si2O7 in incommensurate and normal phases and observation of diffuse streaks at high temperature Sample: T = 573 K Melilite group _database_code_amcsd 0008530 CELL PARAMETERS: 7.8875 7.8875 5.0191 90.000 90.000 90.000 SPACE GROUP: P-42_1m X-RAY WAVELENGTH: 1.541838 Cell Volume: 312.252 Density (g/cm3): 3.050 MAX. ABS. INTENSITY / VOLUME**2: 21.12864273 RIR: 2.256 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 15.89 2.56 5.5773 1 1 0 4 17.67 6.14 5.0191 0 0 1 2 20.98 7.19 4.2345 1 0 1 8 23.85 18.31 3.7308 1 1 1 4 25.25 4.35 3.5274 2 1 0 8 28.79 36.91 3.1010 2 0 1 8 30.99 100.00 2.8860 2 1 1 8 32.10 6.75 2.7887 2 2 0 4 35.78 3.31 2.5096 0 0 2 2 36.01 23.50 2.4942 3 1 0 8 36.87 5.91 2.4377 2 2 1 4 37.61 6.39 2.3914 1 0 2 8 38.66 6.36 2.3290 3 0 1 8 39.37 2.60 2.2885 1 1 2 4 40.38 2.60 2.2336 3 1 1 8 44.30 11.35 2.0448 2 1 2 8 45.22 2.08 2.0054 3 2 1 8 46.03 3.51 1.9719 4 0 0 4 47.53 6.58 1.9130 4 1 0 8 48.82 6.13 1.8654 2 2 2 4 49.00 7.25 1.8591 3 3 0 4 51.10 8.48 1.7876 4 1 1 8 51.67 22.97 1.7691 3 1 2 8 51.84 7.66 1.7637 4 2 0 8 52.49 4.58 1.7434 3 3 1 4 55.20 2.05 1.6640 4 2 1 8 55.74 2.31 1.6490 3 2 2 8 57.51 2.20 1.6025 1 1 3 4 60.07 2.18 1.5402 2 0 3 8 61.33 4.18 1.5116 2 1 3 8 62.87 4.15 1.4783 5 1 1 8 64.59 1.72 1.4430 4 2 2 8 65.01 3.93 1.4347 2 2 3 4 66.21 2.03 1.4115 3 0 3 8 66.50 7.71 1.4060 5 2 1 8 67.13 3.09 1.3943 4 4 0 4 67.40 1.25 1.3894 3 1 3 8 69.49 1.09 1.3527 5 3 0 8 70.04 2.12 1.3434 4 4 1 4 70.51 1.19 1.3356 4 3 2 8 71.81 3.05 1.3146 6 0 0 4 72.96 1.00 1.2967 6 1 0 8 75.49 3.62 1.2594 4 1 3 8 75.81 1.13 1.2548 0 0 4 2 76.62 2.22 1.2436 3 3 3 4 79.13 2.37 1.2103 6 2 1 8 80.24 1.79 1.1963 5 4 1 8 80.70 1.51 1.1907 5 3 2 8 82.91 2.15 1.1645 6 0 2 8 84.39 1.14 1.1477 4 3 3 8 85.49 2.33 1.1358 5 1 3 8 86.90 1.55 1.1209 3 1 4 8 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.