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: tr2
Note: X-coordinate of A site adjusted to match reported bond lengths and Figure 3
_database_code_amcsd 0007067
10.065 10.065 14.341 90 90 120 P6/mcc
atom      x      y      z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
KC        0      0    .25 .12   .019   .019   .015   .009      0      0
FeA     1/3    2/3    .25 .62  .0075  .0075  .0065  .0038      0      0
MgA     1/3    2/3    .25 .38  .0075  .0075  .0065  .0038      0      0
Mg2      .5     .5    .25 .59  .0145  .0145  .0081  .0104      0      0
Fe2      .5     .5    .25 .41  .0145  .0145  .0081  .0104      0      0
Si1  .11856 .35553 .10866      .0101  .0108  .0071  .0052 -.0000 -.0005
O1    .1339  .4009      0       .016   .015   .010   .007      0      0
O2    .2273  .2842  .1323      .0163  .0170  .0155  .0105  .0007  .0002
O3    .1595  .5012  .1737      .0139  .0133  .0104  .0077 -.0015 -.0025