Tincalconite
Luck R L, Wang G
American Mineralogist 87 (2002) 350-354
On the nature of tincalconite
_database_code_amcsd 0002764
11.1402 11.1402 21.207 90 90 120 R32
atom      x      y      z occ Uiso
Na1       0      0      0     .019
Na2  -.3305      0      0     .026
Na3    -2/3   -1/3  .0740     .044
B1    .2666  .0925  .1184     .016
B2   -.5143  .0919  .1207     .025
O1     -2/3  .2002    1/6     .013
O2   -.5029  .1222  .1836     .022
O3   -.6249  .0749  .0855     .023
Oh4   .1952  .1294  .0721     .017
Oh5  -.4168  .0718  .0915     .048
O11  -.1991  .2443 -.0322     .035
O12  -.6279 -.4492  .1705 1/3 .066
H121 -.6174 -.4433  .2089 1/6 .099
H122 -.6403 -.4940  .1375 1/6 .099
H4    .1490  .1480  .0938     .031
H5   -.3540  .0880  .1111     .059
H111 -.1540  .2770  .0071     .069
H112 -.1370  .2550 -.0472     .067