Trattnerite
Postl W, Walter F, Ettinger K, Hauzenberger C, Bojar H P
European Journal of Mineralogy 16 (2004) 375-380
Trattnerite, (Fe,Mg)2(Mg,Fe)3[Si12O30], a new mineral of the milarite group:
mineral data and crystal structure
Sample: tr1
Note: X-coordinate of A site adjusted to match reported bond lengths and Figure 3
_database_code_amcsd 0007066
10.050 10.050 14.338 90 90 120 P6/mcc
atom     x     y     z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
KC       0     0   .25 .05  .02
FeA    1/3   2/3   .25 .65       .0079  .0079  .0071  .0040      0      0
MgA    1/3   2/3   .25 .35       .0079  .0079  .0071  .0040      0      0
Mg2     .5    .5   .25 .62       .0185  .0185  .0102  .0153      0      0
Fe2     .5    .5   .25 .38       .0185  .0185  .0102  .0153      0      0
Si1  .1184 .3554 .1085           .0092  .0105  .0082  .0050 -.0002 -.0008
O1   .1345 .4019     0            .021   .018   .012   .008      0      0
O2   .2277 .2848 .1318            .017   .021   .022   .014   .001   .001
O3   .1588 .5004 .1739            .014   .014   .013  .0072 -.0011 -.0034