General Information:
Chemical Formula:Li2Al4[(Si2AlB)O10](OH)8
Composition:(Molecular Weight = 511.82 gm)Lithium 2.71 %
LiAluminum 26.36 %
AlSilicon 10.97 %
SiBoron 2.11 %
B Hydrogen 1.58 %
H Oxygen 56.27 %
O Empirical Formula: Li2Al5Si2BO10(OH)8
Environment:Pegmatites.
Locality:Antandrokomby, near Mt. Bity on the Manandona River, Madagascar.
Name Origin:Named after its locality.
Physical Properties: Cleavage:[001] Perfect
Color:colorless or pearl white.
Density:2.89
Diaphaniety:Transparent to translucent
Habits:Micaceous - Platy texture with "flexible" plates., Pseudo Hexagonal - Crystals show a hexagonal outline., Massive - Lamellar - Distinctly foliated fine-grained forms.
Hardness:2.5-3.5 - Finger Nail-Copper Penny
Luster:Pearly
Streak:white
More details...
