Montebrasite
Groat L A, Chakoumakos B C, Brouwer D H, Hoffman C M, Fyfe C A, Morell H, Schultz A J
American Mineralogist 88 (2003) 195-210
The amblygonite (LiAlPO4F) - montebrasite (LiAlPO4OH) solid solution:
A combined powder and single-crystal neutron diffraction and solid-state Li MAS, CP MAS,
and REDOR NMR study
Sample: from Dunton Gem Min, Oxford County, Maine at T = 225 K
_database_code_amcsd 0002959
6.7198 7.7149 7.0249 91.320 117.953 91.778 C-1
atom      x      y      z occ  Uiso
P     .9838  .3422  .2669     .0039
Al1       0      0      0     .0043
Al2       0      0    1/2     .0041
O1   -.3180  .0151 -.1603     .0062
O2    .2981  .0587  .5736     .0062
O3    .1016 -.2236 -.3899     .0055
O4    .0263  .2360  .1038     .0064
O     .0484  .0893 -.2257 .98 .0052
F     .0484  .0893 -.2257 .02 .0052
H     .2052  .1336  .8470 .98 .0197
Li1    .064  -.317    .28 .19  .010
Li2    .072 -.3216   .319 .81  .010