Preiswerkite
Oberti R, Ungaretti L, Tlili A, Smith D C, Robert J-L
American Mineralogist 78 (1993) 1290-1298
The crystal structure of preiswerkite
Sample: KP17
_database_code_amcsd 0001621
5.228 9.049 9.819 90 100.41 90 C2/m
atom     x     y     z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
SiT  .5740 .1672 .2139  .5       .0052  .0017  .0005 -.0002  .0003 -.0001
AlT  .5740 .1672 .2139  .5       .0052  .0017  .0005 -.0002  .0003 -.0001
Mg1      0    .5    .5 .85       .0040  .0011  .0007      0  .0004      0
Al1      0    .5    .5 .15       .0040  .0011  .0007      0  .0004      0
Mg2      0 .8302    .5  .5       .0049  .0016  .0006      0  .0004      0
Al2      0 .8302    .5  .5       .0049  .0016  .0006      0  .0004      0
Na       0     0     0 .85       .0190  .0060  .0010      0  .0007      0
O1   .8559 .1989 .1584           .0094  .0036  .0008  .0002  .0011 -.0001
O2   .4530     0 .1651           .0105  .0024  .0007      0  .0004      0
O3   .6348 .1703 .3905           .0094  .0024  .0007 -.0003 -.0001  .0003
Oh4  .1252     0 .3989           .0071  .0073  .0004      0 -.0001      0
H    .0831     0 .2950     1.00