Deltalumite: Difference between revisions

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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 (Al_0.67◻_0.33)Al₂O₄, where ◻ is a vacancy.

Oxospinel type structure.

"Deltalumite, a new natural modification of alumina with spinel-type structure"

How to spell this? Delt-alumite? Delta-lumite? Delta-alumite?

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 Oxospinel type structure.
+== 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!
+How to spell this? Delt-alumite? Delta-lumite? Delta-alumite?
 == Related ==