Tincalconite | |
Chemical Formula |
Na2[B4O5(OH)4]·3H2O |
Species |
Borates |
Crystal System |
Trigonal |
Mohs Scale |
2 |
Specific Gravity |
1.88 |
Color |
White, colourless (artificial material); colourless in transmitted light. |
Luster |
Vitreous, Dull |
Refractive Index |
n = 1.461 n = 1.474 |
Diaphaneity |
Transparent, Translucent |
Fracture |
Hackly |
Crystal Habit:Fine-grained powder. Artificial crystals pseudo-cubic with equal development of the commonest forms "r" and "c," yielding an octahedron-like habit. |