Ribbeite
Freed R L, Rouse R C, Peacor D R
American Mineralogist 78 (1993) 190-194
Ribbeite, a second example of edge-sharing silicate tetrahedra in the
leucophoenicite group
_database_code_amcsd 0001545
10.732 15.672 4.811 90 90 90 Pnma
atom      x      y       z occ Biso
Mn1  .86850 .14501  .49334     1.11
Mn2  .59124    .25  .51449     1.11
Mn3  .64402 .06127 -.00408     1.24
Si1   .7779    .25   .0712     0.55
Si2   .4613  .0448   .5835  .5 0.65
O1    .4616  .0432   .2672     1.22
O2    .7778    .25   .7381     0.73
O3    .9179    .25   .2125     0.78
O4    .7101  .1681   .2123     0.75
O5    .5286  .1373   .7311     1.58
O6    .3109  .0439   .7344     1.37
H1     .555   .126    .569  .5  1.7
H2     .345   .034    .600  .5  2.0