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Akdalaite

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Akdalaite
Akdalaite is a very rare mineral found in Kazakhstan and has the formula 5Al2O3·H2O. 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.

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Mineralogy Database Dictionary

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Akdalaite

General Information:
 Chemical Formula:
4Al2O3)4·(H2O)
 Composition:
(Molecular Weight = 425.86 gm)
Aluminum 50.69 % Al
Hydrogen 0.47 % 
Oxygen 48.84 % 
 Empirical Formula:
(Al2O3)4·(H2O)
 Environment:
In a skarn.
 IMA Status:
Approved IMA 1969
 Locality:
TL:Solvech fluorite deposit, Karaganda region, Kazakhstan, Akdala
 Name Origin:
Named for the Kazakh name for the locality.
Physical Properties:
 Cleavage:
None
 Color:
white.
 Density:
3.68
 Diaphaniety:
Translucent
 Habits:
Tabular - Form dimensions are thin in one direction., ,
 Hardness:
7 - Quartz
 Luster:
Vitreous (Glassy)
 Streak:
white
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