General Information:
Chemical Formula:
Mg2Al3B2O9(OH)
Composition:
(Molecular Weight = 312.18 gm)
Magnesium 15.57 % Mg
Aluminum 25.93 % Al
Boron 6.93 % B
Hydrogen 0.32 % H
Oxygen 51.25 % O
Empirical Formula:
Mg2Al3B2O9OH
Environment:
Associated with hydrotalcite and occurs at the Tayozhnoye Fe-B skarn as a toptactic, retrograde replacement of sinhalite in metasomatized marble.
IMA Status:
Approved IMA 1999 (Dana # Added)
Locality:
TL: Aldan Shield, southern Sakha - Yakutia Republic, Russian
Name Origin:
The name alludes to the optical, chemical, and structural similarity to sinhalite.
Physical Properties:
Cleavage:
None
Color:
colorless.
Density:
3.608 - 3.508, Average = 3.55
Diaphaniety:
Transparent
Habits:
Pseudomorphous - Occurs in the form of another mineral., ,
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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