AM_Trattnerite_1 Formula: K.12 (Fe2.47 Mg2.53) Si12 O30 Name: Trattnerite Unit cell: 10.065 10.065 14.341 90.0 90.0 120.0 , V=1258.16 Space group: P6/MCC (192)

Postl W , Walter F , Ettinger K , Hauzenberger C , Bojar H P , European Journal of Mineralogy , 16 (2004) p.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