Deltalumite: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
|||
| (6 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
{{stub}} | {{stub}} | ||
A polymorph of [[leukosapphire]]. <br> | A polymorph of [[leukosapphire]]. Oxospinel type structure. <br> | ||
This compound/material/gemstone | This compound/material/gemstone is interesting because normally Al<sub>2</sub>O<sub>3</sub> forms [[leukosapphire]] ([[corundum structure]]). | ||
'''Al<sub>2</sub>O<sub>3</sub> Deltalumite''' (δ form of corundum, polymorph of [[sapphire]]) – tetragonal – Mohs ?? (likely quite hard) – [https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Deltalumite] | '''Al<sub>2</sub>O<sub>3</sub> Deltalumite''' (δ form of corundum, polymorph of [[sapphire]]) – tetragonal – Mohs ?? (likely quite hard) – [https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Deltalumite] | ||
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. | ||
== Misc == | |||
How to spell this? Deltalumite? Delt-alumite? Delta-lumite? Delta-alumite? <br> | |||
Too much candy to pick from. | |||
== Related == | == Related == | ||
* [[Leukosapphire]] | |||
* [[Base materials with high potential]] | * [[Base materials with high potential]] | ||
* [[Gemstone]] | * [[Gemstone]] | ||
* [[ | * '''[[Base materials with high potential]]''' | ||
---- | |||
* [[Tistarite]] … a titanium oxide with sapphire stoichometry and structure (unusual) | |||
== External links == | == External links == | ||
* https://www.wikidata.org/wiki/Q27013457 | * [https://www.wikidata.org/wiki/Q27013457 (on wikidata)] | ||
* [https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Deltalumite (on mineralienatlas.de)] | |||
* [https://www.mindat.org/min-47933.html (on mindat.org)] | |||
{{wikitodo|Links seem to be broken, paper abstracts removed?!}} | |||
=== Papers === | |||
"Deltalumite, a new natural modification of alumina with spinel-type structure" | |||
* Researchgate Jannuary 2019 [https://www.researchgate.net/publication/345362779_Deltalumite_a_new_natural_modification_of_alumina_with_spinel-type_structure] | |||
* Researchgate December 2020 [https://www.researchgate.net/publication/349128285_Deltalumite_a_New_Natural_Modification_of_Alumina_with_a_Spinel-Type_Structure] | |||
* [https://www.semanticscholar.org/paper/Deltalumite%2C-a-New-Natural-Modification-of-Alumina-Pekov-Anikin/403a9a67ff0454c5c562f9aa0ff2cdd142c31ac7/figure/3 (semanticscholar)] << Images! | |||
* Paper including figures showing projections of the structure <br>https://link.springer.com/article/10.1134/S1075701520070089 | |||
Latest revision as of 19:42, 27 November 2025
A polymorph of leukosapphire. Oxospinel type structure.
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.
Misc
How to spell this? Deltalumite? Delt-alumite? Delta-lumite? Delta-alumite?
Too much candy to pick from.
Related
- Tistarite … a titanium oxide with sapphire stoichometry and structure (unusual)
External links
(wiki-TODO: Links seem to be broken, paper abstracts removed?!)
Papers
"Deltalumite, a new natural modification of alumina with spinel-type structure"
- Researchgate Jannuary 2019 [2]
- Researchgate December 2020 [3]
- (semanticscholar) << Images!
- Paper including figures showing projections of the structure
https://link.springer.com/article/10.1134/S1075701520070089