Akermanite
Swainson I P, Dove M T, Schmahl W W, Putnis A
Physics and Chemistry of Minerals 19 (1992) 185-195
Neutron powder diffraction study of the akermanite-gehlenite
solid solution series
Sample: 50% Ak
_database_code_amcsd 0007696
7.7475 7.7475 5.0359 90 90 90 P-42_1m
atom     x     y     z  occ B(1,1) B(2,2)  B(3,3)  B(1,2)  B(1,3)  B(2,3)
Ca   .3369 .1631 .5093      .01141 .01141 -.00088  .00399 -.00134 -.00134
MgT1     0     0     0  .46 .00420 .00420  .00177       0       0       0
AlT1     0     0     0  .54 .00420 .00420  .00177       0       0       0
AlT2 .1419 .3581 .9427 .225 .00537 .00537 -.00394 -.00037 -.00076 -.00076
SiT2 .1419 .3581 .9427  .76 .00537 .00537 -.00394 -.00037 -.00076 -.00076
O1      .5     0 .1782      .01082 .01082 -.00256 -.00612       0       0
O2   .1423 .3577 .2676      .01207 .01207 -.00285       0  .00442  .00442
O3   .0850 .1778 .7980      .01541 .00945  .00157 -.00212 -.00237 -.00153