Akdalaite | |
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General | |
Category | Mineral |
Formula (repeating unit) | 5 Al2 O3·H2O |
IMA symbol | Akd |
Identification | |
Color | White, pale greenish yellow in thin section |
Fracture | Irregular/uneven |
Mohs scale hardness | 7–7.5 |
Luster | Vitreous |
Streak | White |
Diaphaneity | Translucent |
Specific gravity | 3.68 |
Akdalaite ( IMA symbol: Akd [1]) is a very rare mineral found in Kazakhstan and has the formula 5 Al2 O3·H2O. [2] It was formerly believed to be 4Al2O3· H2O. It is therefore the same as tohdite an artificially produced phase. Studies on the crystal structure and spectra indicate that this is an aluminium oxide hydroxide. [3]