Amesite

General Information:
 Chemical Formula:
Mg2Al(SiAl)O5(OH)4
 Composition:
(Molecular Weight = 278.68 gm)
Magnesium 17.44 % Mg
Aluminum 19.36 % Al
Silicon 10.08 % Si
Hydrogen 1.45 % H 
Oxygen 51.67 % O 
 Empirical Formula:
Mg2Al2SiO5OH4
 Environment:
Occurs with diaspore.
 Locality:
Chester, Hampden Co., Massachusetts, USA.
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
white or light green.
 Density:
2.77
 Diaphaniety:
Transparent to translucent
 Habits:
Micaceous - Platy texture with "flexible" plates., Foliated - Two dimensional platy forms., Pseudo Hexagonal - Crystals show a hexagonal outline.
 Hardness:
2.5-3 - Finger Nail-Calcite
 Luster:
Pearly
 Streak:
pale green
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AMESITE

B: (Kimia) amesit
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