Mereheadite Krivovichev S V, Turner R, Rumsey M, Sidra O I, Kirk C A Mineralogical Magazine 73 (2009) 103-117 The crystal structure and chemistry of mereheadite Locality: Merehead Quarry, Cranmore, Somerset, England _database_code_amcsd 0014589 CELL PARAMETERS: 17.3720 27.9419 10.6661 90.000 93.152 90.000 SPACE GROUP: Cm X-RAY WAVELENGTH: 1.541838 Cell Volume: 5169.563 Density (g/cm3): 7.319 MAX. ABS. INTENSITY / VOLUME**2: 122.8993253 RIR: 5.468 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 6.00 3.97 14.7370 1 1 0 2 8.30 3.91 10.6500 0 0 1 1 10.02 2.47 8.8299 -1 1 1 2 10.44 1.10 8.4697 0 2 1 2 10.78 5.10 8.2058 1 3 0 2 12.67 1.86 6.9855 0 4 0 2 12.80 1.38 6.9137 -2 0 1 1 13.45 1.53 6.5835 -1 3 1 2 13.52 17.07 6.5510 2 0 1 1 13.79 1.28 6.4199 1 3 1 2 14.29 2.12 6.1965 -2 2 1 2 15.65 1.52 5.6620 3 1 0 2 17.83 2.02 4.9758 0 2 2 2 17.97 2.01 4.9349 1 1 2 2 18.06 3.03 4.9123 3 3 0 2 18.57 1.73 4.7785 2 4 1 2 20.04 3.95 4.4306 2 0 2 1 20.26 5.35 4.3835 3 3 1 2 21.04 3.90 4.2233 2 2 2 2 21.46 1.41 4.1415 4 2 0 2 22.56 1.51 3.9413 4 0 1 1 23.36 67.46 3.8079 -3 5 1 2 23.44 69.26 3.7954 -1 5 2 2 23.78 1.14 3.7415 2 4 2 2 25.23 3.43 3.5294 3 3 2 2 25.88 1.72 3.4427 5 1 0 2 25.90 1.48 3.4407 0 2 3 2 25.96 1.56 3.4326 4 4 1 2 26.09 2.26 3.4151 1 1 3 2 27.23 26.34 3.2755 4 0 2 1 27.66 1.04 3.2247 5 1 1 2 28.33 1.38 3.1501 3 5 2 2 28.41 4.18 3.1413 2 2 3 2 28.69 2.56 3.1117 3 7 1 2 29.03 1.05 3.0755 -4 6 1 2 29.13 4.68 3.0655 5 3 1 2 30.13 1.24 2.9656 4 4 2 2 30.33 100.00 2.9474 5 5 0 2 30.51 99.90 2.9300 1 5 3 2 31.10 1.82 2.8754 -5 5 1 2 31.60 3.13 2.8310 6 2 0 2 31.62 1.90 2.8296 -6 0 1 1 31.68 54.81 2.8241 -4 0 3 1 31.69 1.74 2.8232 0 6 3 2 31.88 4.24 2.8071 5 5 1 2 32.03 57.10 2.7942 0 10 0 2 32.28 2.45 2.7733 -6 2 1 2 32.47 1.07 2.7575 3 7 2 2 32.65 1.17 2.7429 2 8 2 2 32.93 2.10 2.7201 4 8 0 2 33.01 1.94 2.7132 5 3 2 2 33.49 1.24 2.6758 4 0 3 1 34.19 1.35 2.6226 -6 4 1 2 34.34 2.53 2.6114 3 5 3 2 35.16 1.71 2.5521 -1 3 4 2 35.31 1.40 2.5417 -5 1 3 2 35.65 3.29 2.5186 5 7 1 2 35.72 1.81 2.5134 1 3 4 2 36.07 1.94 2.4897 0 8 3 2 36.10 1.43 2.4879 0 4 4 2 37.52 1.64 2.3971 -1 5 4 2 37.98 3.44 2.3690 2 8 3 2 38.05 3.36 2.3650 1 5 4 2 38.07 1.08 2.3634 2 10 2 2 38.08 1.25 2.3634 -7 3 1 2 38.93 1.28 2.3135 5 9 0 2 39.08 1.69 2.3051 1 9 3 2 40.29 1.39 2.2387 -7 5 1 2 40.51 2.39 2.2270 6 8 0 2 40.83 1.64 2.2099 -1 7 4 2 41.05 2.31 2.1986 -6 8 1 2 41.35 13.38 2.1837 6 0 3 1 42.07 10.35 2.1478 -8 0 1 1 42.44 10.29 2.1300 0 0 5 1 42.53 21.94 2.1258 4 10 2 2 45.63 1.04 1.9882 -6 10 1 2 45.68 42.13 1.9863 -4 10 3 2 48.53 1.22 1.8758 -9 3 1 2 50.42 1.11 1.8098 -9 3 2 2 51.65 5.48 1.7698 -7 5 4 2 51.77 5.59 1.7660 -5 5 5 2 52.15 6.39 1.7538 -3 15 1 2 52.19 6.07 1.7525 -1 15 2 2 52.78 6.95 1.7346 10 0 0 1 53.24 14.64 1.7206 6 10 3 2 53.24 6.95 1.7205 2 0 6 1 53.84 6.14 1.7029 -8 10 1 2 54.04 14.15 1.6971 9 5 2 2 54.14 6.21 1.6939 0 10 5 2 54.20 1.11 1.6923 -1 5 6 2 54.30 14.19 1.6893 5 5 5 2 55.48 11.35 1.6563 -9 5 3 2 55.82 10.87 1.6471 -3 5 6 2 56.03 12.74 1.6412 5 15 0 2 56.15 12.27 1.6381 1 15 3 2 56.16 2.35 1.6377 8 0 4 1 63.08 5.45 1.4737 10 10 0 2 63.50 5.55 1.4650 2 10 6 2 66.13 1.62 1.4129 8 10 4 2 66.18 4.08 1.4120 -8 0 6 1 66.98 5.02 1.3971 0 20 0 2 68.52 1.30 1.3695 11 5 3 2 68.82 1.28 1.3643 7 5 6 2 71.58 1.45 1.3183 -7 15 4 2 71.68 1.61 1.3167 -5 15 5 2 72.09 2.04 1.3102 10 0 5 1 72.96 3.44 1.2966 -13 5 1 2 73.57 4.03 1.2874 9 15 2 2 73.64 3.76 1.2863 1 5 8 2 73.73 1.97 1.2851 4 20 2 2 73.80 4.21 1.2840 5 15 5 2 74.80 3.19 1.2693 -9 15 3 2 74.94 1.24 1.2673 12 10 1 2 75.09 3.22 1.2651 -3 15 6 2 75.43 4.12 1.2603 -8 10 6 2 75.45 1.27 1.2599 4 10 7 2 76.00 4.82 1.2522 -4 20 3 2 81.06 2.08 1.1863 10 10 5 2 81.65 1.09 1.1792 -12 10 4 2 81.85 2.14 1.1768 6 20 3 2 82.16 1.13 1.1732 -4 10 8 2 82.34 1.39 1.1711 -8 20 1 2 82.59 1.42 1.1682 0 20 5 2 84.85 1.05 1.1428 13 5 4 2 85.19 1.07 1.1390 9 5 7 2 89.33 1.49 1.0967 14 10 2 2 89.49 1.36 1.0951 -14 10 3 2 89.95 1.59 1.0907 6 10 8 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.