Difference between revisions of "Topaz"
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Revision as of 17:09, 13 June 2021
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