AM-2013-10011-A · Topazarchived
physical & structuralrev. 4
| designation | Topaz |
|---|---|
| chemical formula | Al₂SiO₄(F,OH)₂ |
| classification | Nesosilicate |
| crystal system | Orthorhombic |
| mohs hardness | 8 |
| density (g/cm³) | 3.52 |
| colour | Pale colourless, transparent |
| type locality | South Crofty mine, Cornwall, England |
raman spectroscopy532 nm · pass A
reported peaks (cm⁻¹): 290, 401, 934
notessubmitter remarks + registry
Crystals up to 11 mm on edge, in random orientation. On quartz matrix.