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 = 295 K
_database_code_amcsd 0002960
6.7234 7.7181 7.0258 91.302 117.953 91.773 C-1
atom      x      y      z occ  Uiso
P     .9842  .3422  .2667     .0050
Al1       0      0      0     .0053
Al2       0      0    1/2     .0052
O1   -.3175  .0153 -.1595     .0077
O2    .2980  .0583  .5742     .0076
O3    .1013 -.2237 -.3895     .0070
O4    .0263  .2360  .1036     .0081
O     .0480  .0893 -.2258 .96 .0066
F     .0480  .0893 -.2258 .04 .0066
H     .2044  .1335  .8470 .96 .0207
Li1    .066  -.317   .274 .23  .013
Li2   .0709 -.3213   .318 .77  .011