Tusionite
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| Tusionite | |
|---|---|
| Category | Mineral |
| Chemical formula | MnSn(BO3)2 |
| Identification | |
| Color | Colorless, light yellow to yellow brown |
| Crystal system | Trigonal |
| Cleavage | [001] Perfect |
| Mohs Scale hardness | 5-6 |
| Luster | Vitreous |
| Streak | white |
| Specific gravity | 4.73 |
Tusionite is a rare colorless to transparent to translucent yellow brown trigonal borate mineral with chemical formula: MnSn(BO3)2. The mineral is composed of 18.86% manganese, 40.76% tin, 7.42% boron, and 32.96% oxygen. Tusionite was named for the location where the mineral was first discovered in 1983 the Tusion River Valley in the Pamir Mountains of Tajikistan. Tusionite has also been reported from Recice in the Czech Republic.
