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American Mineralogist Crystal Structure Database

1 matching records for this search.

Londonite
Download hom/londonite.pdf 
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
7.3098 7.3098 7.3098 90 90 90 P-43m
atom      x      y      z occ  Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Cs        0      0      0 .34  .023
K         0      0      0 .34  .023
Rb        0      0      0 .17  .023
Al    .3608  .3608  .3608     .0020  .0020  .0020  .0020 -.0001 -.0001 -.0001
Be1  .24835     .5      0 .12 .0028  .0031  .0030  .0022      0      0 -.0002
B1   .24835     .5      0 .88 .0028  .0031  .0030  .0022      0      0 -.0002
Be2  .25833 .74167 .25833 .97 .0036  .0036  .0036  .0036  .0001 -.0001  .0001
B2   .25833 .74167 .25833 .03 .0036  .0036  .0036  .0036  .0001 -.0001  .0001
O1   .38103 .61897 .38103     .0023  .0023  .0023  .0023  .0003 -.0003  .0003
O2   .36350 .36350 .09976     .0039  .0045  .0045  .0027  .0007  .0003  .0003
O3   .39923 .86485 .13515     .0040  .0046  .0037  .0037 -.0004  .0004  .0001


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