Difference between revisions of "White sapphire"
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== External links == | == External links == | ||
| − | + | Wikipedia | |
| + | * [https://en.wikipedia.org/wiki/Corundum Corundum] | ||
| + | * [https://en.wikipedia.org/wiki/Sapphire Sapphire] | ||
| + | * [https://en.wikipedia.org/wiki/Ruby Ruby] | ||
| + | ---- | ||
* materialsproject.org [https://materialsproject.org/materials/mp-1143/] | * materialsproject.org [https://materialsproject.org/materials/mp-1143/] | ||
* mineralienatlas (de) [https://www.mineralatlas.eu/lexikon/index.php/MineralData?mineral=Corundum] | * mineralienatlas (de) [https://www.mineralatlas.eu/lexikon/index.php/MineralData?mineral=Corundum] | ||
* Strukturtypendatenbank uni-freiburg: [http://ruby.chemie.uni-freiburg.de/Vorlesung/Strukturtypen/a2b3_korund.html] | * Strukturtypendatenbank uni-freiburg: [http://ruby.chemie.uni-freiburg.de/Vorlesung/Strukturtypen/a2b3_korund.html] | ||
* Wikidata leukosapphire: https://www.wikidata.org/wiki/Q3831236 | * Wikidata leukosapphire: https://www.wikidata.org/wiki/Q3831236 | ||
Revision as of 11:51, 6 June 2023
Advantages:
- very hard material (Mohs 9 – defining mineral), very high heat conductivity
- made out of the extremely common element aluminum (more common than carbon)
- thermodynamically stable not just metastable thus very heat resistant
- Crystal structure: trigonal
It is of slightly less high symmetry than other interesting base materials.
Maybe look at metastable polymorphs at the eventual cost of somewhat less heat resistance?
Terminology
Note: The page uses the term "leukosapphire" instead of just "sapphire" because
just sapphire is often associated with a blue to black variant where the color is caused by metal impurities.
A base material for gemstone metamaterial technology would be perfectly impurity free and colorless clear though.
Like a leukosapphire. Just even more clear.
Related
- Tistarite Ti2O3 has the same structure. => neo-polymorph series?
- Gemstone like compounds with high potential – Gemstone like compounds
- Corundum structure – Simple crystal structures of especial interest
- Aluminum oxides
- Moissanite is also an extremely heat resistant base material.
- Diamond is much less heat and oxidation resistant.
- Both diamond and moissanite have higher crystal structure symmetry than leukosapphire
Polymorphs
Deltalumite Al2O3 (δ form of corundum, polymorph of sapphire) – tetragonal – Mohs ? –
Paper: "Deltalumite, a new natural modification of alumina with spinel-type structure"
- Researchgate Jannuary 2019 [1]
- Researchgate December 2020 [2]
- (semanticscholar) << Images!
How to spell this ??
- Delt-alumite?
- Delta-lumite?
- Delta-alumite?
External links
Wikipedia
- materialsproject.org [3]
- mineralienatlas (de) [4]
- Strukturtypendatenbank uni-freiburg: [5]
- Wikidata leukosapphire: https://www.wikidata.org/wiki/Q3831236
