Amblygonite
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 AF-46: from Karibib, South Africa at T = 295 K
Natural Museum of Natural History, Washington D.C. #105914
_database_code_amcsd 0002969
6.6815 7.7160 6.9565 90.777 117.617 91.275 C-1
atom       x       y       z  occ  Uiso
P     .98526  .34060  .26028      .0057
Al1        0       0       0      .0058
Al2        0       0     1/2      .0049
O1   -.31648  .01684 -.15047      .0088
O2    .29861  .06004  .58277      .0093
O3    .09968 -.22222 -.38606      .0079
O4    .02593  .23308  .09627      .0096
O      .0318  .08571 -.23449  .44 .0087
F      .0318  .08571 -.23449  .54 .0087
H      .2005   .1377   .8436  .44  .022
Li1     .047  -.3221    .248  .40 .0163
Li2    .0677  -.3234    .314  .60 .0156