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 = 150 K
_database_code_amcsd 0002958
6.7158 7.7113 7.0232 91.343 117.953 91.778 C-1
atom      x      y      z occ  Uiso
P     .9836  .3421  .2673     .0038
Al1       0      0      0      .004
Al2       0      0    1/2      .004
O1   -.3182  .0147 -.1607     .0060
O2    .2975  .0586  .5729     .0056
O3    .1022 -.2236 -.3901     .0051
O4    .0259  .2360  .1038     .0064
O     .0485  .0894 -.2257 .96 .0052
F     .0485  .0894 -.2257 .04 .0052
H     .2059  .1335  .8477 .96  .019
Li1    .063  -.322   .303 .39  .001
Li2    .077  -.320   .325 .61  .016