Alumoakermanite Wiedenmann D, Zaitsev A N, Britvin S N, Krivovichev S V, Keller J Mineralogical Magazine 73 (2009) 373-384 Alumoakermanite, (Ca,Na)2(Al,Mg,Fe2+)(Si2O7), a new mineral from the active carbonatite-nephelinite-phonolite volcano Oldoinyo Lengai, northern Tanzania Locality: Oldoinyo Lengai, northern Tanzania _database_code_amcsd 0020206 CELL PARAMETERS: 7.7661 7.7661 5.0297 90.000 90.000 90.000 SPACE GROUP: P-42_1m X-RAY WAVELENGTH: 1.541838 Cell Volume: 303.353 Density (g/cm3): 3.013 MAX. ABS. INTENSITY / VOLUME**2: 20.46267218 RIR: 2.212 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 16.14 2.80 5.4915 1 1 0 4 17.63 10.58 5.0297 0 0 1 2 21.04 5.74 4.2217 1 0 1 8 23.99 18.43 3.7091 1 1 1 4 25.65 6.43 3.4731 2 1 0 8 29.05 28.00 3.0736 2 0 1 8 31.30 100.00 2.8579 2 1 1 8 32.61 5.77 2.7457 2 2 0 4 35.70 2.99 2.5148 0 0 2 2 36.59 21.22 2.4559 3 1 0 8 37.31 8.01 2.4100 2 2 1 4 37.59 7.42 2.3925 1 0 2 8 39.14 8.12 2.3017 3 0 1 8 39.41 2.91 2.2865 1 1 2 4 40.89 2.40 2.2068 3 1 1 8 44.48 10.23 2.0369 2 1 2 8 45.83 2.65 1.9800 3 2 1 8 46.79 5.40 1.9415 4 0 0 4 48.32 4.86 1.8836 4 1 0 8 49.13 4.49 1.8545 2 2 2 4 49.82 7.84 1.8305 3 3 0 4 51.83 7.03 1.7639 4 1 1 8 52.05 24.97 1.7570 3 1 2 8 52.71 7.86 1.7366 4 2 0 8 53.25 3.58 1.7201 3 3 1 4 56.02 1.94 1.6415 4 2 1 8 56.23 2.29 1.6359 3 2 2 8 57.47 2.26 1.6035 1 1 3 4 60.11 1.68 1.5392 2 0 3 8 61.41 5.17 1.5099 2 1 3 8 63.86 3.32 1.4577 5 1 1 8 65.20 4.69 1.4309 2 2 3 4 65.30 1.92 1.4290 4 2 2 8 66.44 2.11 1.4072 3 0 3 8 67.57 9.79 1.3863 5 2 1 8 67.66 1.86 1.3847 3 1 3 8 68.32 3.81 1.3729 4 4 0 4 71.19 1.97 1.3244 4 4 1 4 71.38 1.23 1.3215 4 3 2 8 73.11 3.62 1.2944 6 0 0 4 75.63 1.34 1.2574 0 0 4 2 75.99 4.03 1.2523 4 1 3 8 76.08 1.13 1.2510 5 2 2 8 77.07 1.36 1.2375 6 1 1 8 77.15 2.00 1.2364 3 3 3 4 79.55 1.18 1.2050 4 4 2 4 80.52 2.25 1.1929 6 2 1 8 81.66 2.15 1.1791 5 4 1 8 81.84 1.23 1.1770 5 3 2 8 84.11 2.27 1.1509 6 0 2 8 84.80 1.14 1.1432 2 2 4 4 85.16 1.33 1.1394 4 3 3 8 85.94 1.42 1.1311 3 0 4 8 86.29 2.69 1.1273 5 1 3 8 87.07 2.21 1.1192 3 1 4 8 89.68 1.47 1.0933 5 2 3 8 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.