Titanoholtite
| Titanoholtite | |
|---|---|
| General | |
| Category | Silicate mineral |
| Formula | (Ti0.75[]0.25)Al6BSi3O18 |
| IMA symbol | Thlt |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Space group | Pbcm |
| Unit cell | a = 47.00 Å, b = 11.83 Å c = 20.24 Å |
| Identification | |
| References | |
Titanoholtite is an extremely rare mineral with the formula (Ti0.75[]0.25)Al6BSi3O18. It is titanium-rich member of dumortierite supergroup, and titanium-analogue of holtite of the holtite group. It is one of three quite recently found minerals of this group, the other two being nioboholtite and szklaryite, all coming from the Szklary village near Ząbkowice Śląskie in Poland. They occur in a unique pegmatite of probable anatectic origin.