Alunite Zema M, Callegari A M, Tarantino S C, Gasparini E, Ghigna P Mineralogical Magazine 76 (2012) 613-623 Thermal expansion of alunite up to dehydroxylation and collapse of the crystal structure Note: T = 450 C Locality: Hungary _database_code_amcsd 0018989 CELL PARAMETERS: 6.9916 6.9916 17.6210 90.000 90.000 120.000 SPACE GROUP: R-3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 745.958 Density (g/cm3): 2.729 MAX. ABS. INTENSITY / VOLUME**2: 14.77903589 RIR: 1.763 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 15.08 2.10 5.8737 0 0 3 2 15.47 16.29 5.7263 1 0 1 6 17.77 61.60 4.9901 0 1 2 6 25.48 27.67 3.4958 1 1 0 6 29.32 5.42 3.0458 0 1 5 6 29.74 100.00 3.0040 1 1 3 12 29.95 26.47 2.9837 0 2 1 6 30.44 8.58 2.9368 0 0 6 2 36.00 5.19 2.4951 0 2 4 6 38.74 33.62 2.3244 1 0 7 6 39.23 2.40 2.2965 2 0 5 6 40.73 5.22 2.2150 1 2 2 12 44.62 1.20 2.0308 2 1 4 12 46.38 5.76 1.9579 0 0 9 2 47.64 31.66 1.9088 0 3 3 6 47.64 1.16 1.9088 3 0 3 6 51.29 1.32 1.7811 2 0 8 6 52.34 21.93 1.7479 2 2 0 6 55.72 2.70 1.6496 3 1 2 12 58.13 1.97 1.5870 1 2 8 12 60.82 17.67 1.5229 0 2 10 6 61.13 2.40 1.5160 3 1 5 12 61.48 1.13 1.5082 4 0 1 6 61.76 7.60 1.5020 2 2 6 12 62.23 1.83 1.4919 0 4 2 6 65.17 2.44 1.4316 4 0 4 6 66.54 1.41 1.4053 0 3 9 6 66.99 3.46 1.3970 1 3 7 12 67.32 1.12 1.3909 0 4 5 6 68.37 2.87 1.3721 2 3 2 12 71.30 1.68 1.3227 1 0 13 6 71.39 1.81 1.3213 4 1 0 12 72.49 2.10 1.3039 2 2 9 12 73.46 2.36 1.2891 1 4 3 12 73.46 4.22 1.2891 4 1 3 12 78.67 5.91 1.2162 3 2 7 12 78.71 2.43 1.2157 1 3 10 12 80.97 1.90 1.1874 0 3 12 6 82.76 3.93 1.1663 2 1 13 12 84.35 2.39 1.1482 4 0 10 6 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.