Seamanite
Moore P B, Ghose S
American Mineralogist 56 (1971) 1527-1538
A novel face-sharing octahedral trimer in the crystal structure of seamanite
_database_code_amcsd 0000258
7.811 15.114 6.691 90 90 90 Pbnm
atom      x     y     z Biso
Mn1   .2783 .4758   .25  .53
Mn2   .3507 .6406 .5016  .58
P     .6931 .5542   .25  .30
B     .0072 .3146   .25  .63
OH1   .4615 .3688   .25  .91
OH2   .1862 .6165   .25  .80
OH3   .0399 .4099   .25 1.01
OH4  -.1846 .3027   .25  .69
OH5   .0810 .2739 .0742 1.12
O6    .7246 .4961 .0648  .91
O7    .5042 .5845   .25  .90
O8    .8112 .6340   .25  .96