Deltalumite: Difference between revisions

Revision as of 11:46, 30 August 2022

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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]

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(No difference)