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.