Traskita
Fórmula química: Ba<sub>21</sub>Ca(Fe<sup>2+</sup>,Mn<sup>2+</sup>,Ti<sup>4+</sup>)<sub>4</sub>(Ti<sup>4+</sup>,Fe<sup>2+</sup>,Mg)<sub>12</sub>(Si<sub>12</sub>O<sub>36</sub>)(Si<sub>2</sub>O<sub>7</sub>)<sub>6</sub>(O,OH)<sub>30</sub>Cl<sub>6</sub>·14H<sub>2</sub>O