Cervandonite-(Ce) Demartin F, Gramaccioli C M, Graeser S The Canadian Mineralogist 46 (2008) 423-430 The crystal structure of cervandonite-(Ce), an interesting example of As3+ - Si diadochy Locality: Alpine fissures at Pizzo Cervandone, Scherbadung, Central Alps Note: Chemistry from original description of the mineral. _database_code_amcsd 0006185 CELL PARAMETERS: 6.5080 6.5080 18.5200 90.000 90.000 120.000 SPACE GROUP: R3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 679.308 Density (g/cm3): 4.494 MAX. ABS. INTENSITY / VOLUME**2: 43.77289431 RIR: 3.171 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 14.35 7.73 6.1733 0 0 3 1 16.44 37.45 5.3919 1 0 1 3 18.43 2.63 4.8144 0 1 2 3 24.89 18.25 3.5776 1 0 4 3 27.41 76.54 3.2540 1 1 0 6 28.93 37.63 3.0867 0 0 6 1 31.07 100.00 2.8786 1 1 3 6 32.13 9.59 2.7860 0 2 1 3 33.23 29.02 2.6960 2 0 2 3 37.36 8.41 2.4072 0 2 4 3 37.55 20.58 2.3950 1 0 7 3 40.27 28.65 2.2394 1 1 6 6 42.20 1.60 2.1414 0 1 8 3 42.73 15.82 2.1163 2 1 1 6 43.60 2.31 2.0760 1 2 2 6 46.95 1.64 1.9352 2 1 4 6 47.12 1.59 1.9289 0 2 7 3 48.45 10.43 1.8787 3 0 0 3 49.35 2.44 1.8466 1 2 5 6 50.80 15.72 1.7973 0 3 3 3 50.80 7.71 1.7973 3 0 3 3 51.06 8.55 1.7888 2 0 8 3 51.97 3.56 1.7594 1 0 10 3 52.62 14.34 1.7392 1 1 9 6 55.37 8.31 1.6592 2 1 7 6 56.57 27.83 1.6270 2 2 0 6 57.42 5.84 1.6048 0 3 6 3 57.42 3.00 1.6048 3 0 6 3 58.68 2.22 1.5733 2 2 3 6 59.33 1.70 1.5576 1 3 1 6 59.75 11.49 1.5477 0 2 10 3 59.94 2.24 1.5433 0 0 12 1 62.74 1.21 1.4810 1 3 4 6 64.77 14.46 1.4393 2 2 6 6 66.95 1.87 1.3977 2 1 10 6 67.20 2.45 1.3930 0 4 2 3 67.51 3.06 1.3874 0 3 9 3 67.51 3.77 1.3874 3 0 9 3 67.86 3.35 1.3812 1 0 13 3 69.77 1.68 1.3480 4 0 4 3 69.89 4.55 1.3458 1 3 7 6 74.65 1.53 1.2714 0 2 13 3 76.49 1.86 1.2454 3 2 4 6 77.63 4.78 1.2299 4 1 0 6 79.45 3.31 1.2062 1 4 3 6 79.45 4.94 1.2062 4 1 3 6 79.66 1.08 1.2036 0 4 8 3 80.39 1.76 1.1945 1 3 10 6 81.23 5.10 1.1842 2 1 13 6 83.15 2.47 1.1617 3 2 7 6 83.80 2.05 1.1544 1 1 15 6 84.87 1.73 1.1425 1 4 6 6 84.87 2.52 1.1425 4 1 6 6 86.86 2.38 1.1214 4 0 10 3 87.02 2.93 1.1197 2 2 12 6 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.