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 = 300 K
_database_code_amcsd 0017717
CELL PARAMETERS: 7.3098 7.3098 7.3098 90.000 90.000 90.000
SPACE GROUP: P-43m
X-RAY WAVELENGTH: 1.541838
Cell Volume: 390.586
Density (g/cm3): 3.368
MAX. ABS. INTENSITY / VOLUME**2: 12.96736951
RIR: 1.254
RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
2-THETA INTENSITY D-SPACING H K L Multiplicity
12.11 29.99 7.3098 1 0 0 6
17.16 5.27 5.1688 1 1 0 12
24.35 8.59 3.6549 2 0 0 6
27.28 33.61 3.2690 2 1 0 24
29.94 100.00 2.9842 2 1 1 12
34.71 4.42 2.5844 2 2 0 12
36.89 12.73 2.4366 2 2 1 12
36.89 25.35 2.4366 3 0 0 6
40.95 29.38 2.2040 3 1 1 12
42.86 48.46 2.1102 2 2 2 4
44.70 2.95 2.0274 3 2 0 24
46.48 28.44 1.9536 3 2 1 24
49.90 22.91 1.8275 4 0 0 6
51.55 4.08 1.7729 3 2 2 12
51.55 24.22 1.7729 4 1 0 24
53.16 9.97 1.7229 3 3 0 12
53.16 6.97 1.7229 4 1 1 12
56.28 3.52 1.6345 4 2 0 24
57.80 4.97 1.5951 4 2 1 24
59.30 8.69 1.5585 3 3 2 12
62.22 2.92 1.4921 4 2 2 12
63.65 1.86 1.4620 5 0 0 6
63.65 1.58 1.4620 4 3 0 24
65.06 8.99 1.4336 4 3 1 24
65.06 1.11 1.4336 5 1 0 24
66.46 5.45 1.4068 5 1 1 12
66.46 2.71 1.4068 3 3 3 4
69.21 1.31 1.3574 5 2 0 24
69.21 3.44 1.3574 4 3 2 24
70.57 4.10 1.3346 5 2 1 24
73.25 41.46 1.2922 4 4 0 12
74.58 2.04 1.2725 5 2 2 12
75.90 1.98 1.2536 4 3 3 12
81.10 5.90 1.1858 5 3 2 24
81.10 1.69 1.1858 6 1 1 12
84.95 5.28 1.1416 4 4 3 12
84.95 1.91 1.1416 6 2 1 24
86.23 2.54 1.1279 5 4 1 24
87.51 1.76 1.1147 5 3 3 12
88.78 4.75 1.1020 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.