Londonite
Gatta G D, Vignola P, McIntyre G J, Diella V
American Mineralogist 95 (2010) 1467-1472
On the crystal chemistry of londonite [(Cs,K,Rb)Al4Be5B11O28]:
a single-crystal neutron diffraction study at 300 and 20 K
Locality: Antsongombato Gem mine, Betafo district, Madagascar
Note: neutron diffraction study at T = 20 K
_database_code_amcsd 0017718
CELL PARAMETERS: 7.3094 7.3094 7.3094 90.000 90.000 90.000
SPACE GROUP: P-43m
X-RAY WAVELENGTH: 1.541838
Cell Volume: 390.522
Density (g/cm3): 3.369
MAX. ABS. INTENSITY / VOLUME**2: 13.20732270
RIR: 1.277
RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
2-THETA INTENSITY D-SPACING H K L Multiplicity
12.11 28.87 7.3094 1 0 0 6
17.16 5.26 5.1685 1 1 0 12
24.35 8.68 3.6547 2 0 0 6
27.28 34.96 3.2689 2 1 0 24
29.94 100.00 2.9841 2 1 1 12
34.71 4.85 2.5843 2 2 0 12
36.89 13.34 2.4365 2 2 1 12
36.89 25.87 2.4365 3 0 0 6
40.95 30.47 2.2039 3 1 1 12
42.86 48.68 2.1100 2 2 2 4
44.70 3.34 2.0273 3 2 0 24
46.49 29.72 1.9535 3 2 1 24
49.91 22.30 1.8274 4 0 0 6
51.55 4.67 1.7728 3 2 2 12
51.55 25.39 1.7728 4 1 0 24
53.16 10.54 1.7228 3 3 0 12
53.16 7.31 1.7228 4 1 1 12
56.29 4.08 1.6344 4 2 0 24
57.81 5.76 1.5950 4 2 1 24
59.30 9.31 1.5584 3 3 2 12
62.22 3.38 1.4920 4 2 2 12
63.65 2.02 1.4619 5 0 0 6
63.65 1.25 1.4619 4 3 0 24
65.07 9.75 1.4335 4 3 1 24
65.07 1.54 1.4335 5 1 0 24
66.46 3.04 1.4067 3 3 3 4
66.46 5.97 1.4067 5 1 1 12
69.22 1.66 1.3573 5 2 0 24
69.22 4.27 1.3573 4 3 2 24
70.58 4.89 1.3345 5 2 1 24
73.26 43.63 1.2921 4 4 0 12
74.58 2.30 1.2724 5 2 2 12
75.90 1.67 1.2536 4 3 3 12
78.52 1.15 1.2182 4 4 2 12
81.11 6.82 1.1857 5 3 2 24
81.11 1.87 1.1857 6 1 1 12
84.96 6.05 1.1415 4 4 3 12
84.96 2.42 1.1415 6 2 1 24
86.24 2.70 1.1279 5 4 1 24
87.52 2.14 1.1147 5 3 3 12
88.79 5.00 1.1019 6 2 2 12
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XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.