Deltalumite: Difference between revisions
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Its structural formula can be written as (Al<sub>0.67</sub>◻<sub>0.33</sub>)Al<sub>2</sub>O<sub>4</sub>, where ◻ is a vacancy. | Its structural formula can be written as (Al<sub>0.67</sub>◻<sub>0.33</sub>)Al<sub>2</sub>O<sub>4</sub>, where ◻ is a vacancy. | ||
Oxospinel type structure. | |||
== Related == | == Related == | ||
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* https://www.wikidata.org/wiki/Q27013457 | * https://www.wikidata.org/wiki/Q27013457 | ||
* Paper including figures showing projections of the structure <br>https://link.springer.com/article/10.1134/S1075701520070089 | |||
Revision as of 12:19, 30 August 2022
A polymorph of leukosapphire.
This compound/material/gemstone is interesting because normally Al2O3 forms leukosapphire (corundum structure).
Al2O3 Deltalumite (δ form of corundum, polymorph of sapphire) – tetragonal – Mohs ?? (likely quite hard) – [1]
Its structural formula can be written as (Al0.67◻0.33)Al2O4, where ◻ is a vacancy.
Oxospinel type structure.
Related
External links
- https://www.wikidata.org/wiki/Q27013457
- Paper including figures showing projections of the structure
https://link.springer.com/article/10.1134/S1075701520070089