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 = 15 K
_database_code_amcsd 0002956
6.7114 7.7048 7.0187 91.320 117.949 91.784 C-1
atom      x      y      z occ  Uiso
P     .9836  .3424  .2672     .0032
Al1       0      0      0     .0041
Al2       0      0    1/2     .0027
O1   -.3180  .0146 -.1611     .0045
O2    .2979  .0589  .5725     .0044
O3    .1021 -.2239 -.3904     .0045
O4    .0256  .2357  .1041     .0048
O     .0491  .0894 -.2255 .96 .0042
F     .0491  .0894 -.2255 .04 .0042
H     .2063  .1337  .8484 .96  .017
Li1    .067  -.323   .322 .50  .007
Li2    .070  -.320   .305 .50  .008