Difference between revisions of "Topaz"
From apm
(Created page with " Two end members: * hydroxy-topaz: Al<sub>2</sub>SiO<sub>4</sub>(OH)<sub>2</sub> * fluorine-topaz: Al<sub>2</sub>SiO<sub>4</sub>F<sub>2</sub> – (Maybe some fluorine could be...") |
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* Wikipedia: [https://en.wikipedia.org/wiki/Topaz Topaz] | * Wikipedia: [https://en.wikipedia.org/wiki/Topaz Topaz] | ||
* [https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Topaz on www.mineralienatlas.de] | * [https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Topaz on www.mineralienatlas.de] | ||
| + | * Wikipedia: [https://en.wikipedia.org/wiki/Mohs_scale Mohs scale] | ||
Latest revision as of 12:17, 16 February 2024
Two end members:
- hydroxy-topaz: Al2SiO4(OH)2
- fluorine-topaz: Al2SiO4F2 – (Maybe some fluorine could be replaced with the more common chlorine?)
A pretty hard aluminum silicate.
In terms of elemental composition between sapphire and quartz.
Other properties:
- Mohs 8 (defining mineral)
- Orthorhombic – (Nesosilicate like olivine)
External links
- Wikipedia: Topaz
- on www.mineralienatlas.de
- Wikipedia: Mohs scale
