Citation: Postl, W.; Walter, F.; Ettinger, K.; Hauzenberger, C.; Bojar, H. P. (2004). 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. European Journal of Mineralogy, 16, pp. 375-380.