Hennomartinite
Libowitzky E, Armbruster T
American Mineralogist 81 (1996) 9-18
Lawsonite-type phase transitions in hennomartinite, SrMn2[Si2O7](OH)2.H2O
T = 245 C
_database_code_amcsd 0001770
6.255 9.067 13.431 90 90 90 Cmcm
atom     x      y      z occ Biso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Sr       0 .31258    .25           .0227  .0220  .0144      0      0      0
Mn     .25    .25      0           .0109  .0116  .0112 -.0004  .0001 -.0027
Si       0 .96991 .13224           .0120  .0090  .0082      0      0      0
O1       0  .0198    .25            .028   .022  .0077      0      0      0
O2   .2851  .3723 .11492           .0144  .0178  .0164 -.0039  .0018 -.0055
O3       0  .1275  .0768           .0216  .0115  .0148      0      0  .0038
O4       0  .6340  .0424           .0181  .0127  .0216      0      0  .0032
O5    .029  .6068    .25  .5         .05   .037   .025      0      0      0
Hw       0   .637   .198     4.74
Hh       0   .552   .046     7.11