Magnesiofoitite

General Information:
 Chemical Formula:
[ ](Mg2Al)Al6(Si6O18)(BO3)3(OH)4
 Composition:
(Molecular Weight = 1,114.86 gm)
Magnesium 4.36 % Mg
Aluminum 16.94 % Al
Silicon 15.12 % Si
Boron 5.82 % B 
Hydrogen 0.36 % H 
Oxygen 57.40 % O 
 Empirical Formula:
Mg2Al7Si6O18(BO3)3(OH)4
 Environment:
Found in a hydrothermally altered quartz-phenocryst-bearing porphyry. The Mg analogue of foitite.
 IMA Status:
Approved IMA (Dana # Added)
 Locality:
Kyonosawa, Mitomi-mura, Higashi-Yamanashi-gun, Yamanashi-ken Prefecture, Honshu, Japan.
 Name Origin:
The name recalls its composition and relationship to foitite.
Physical Properties:
 Color:
bluish gray.
 Diaphaniety:
Transparent
 Luster:
Earthy (Dull)
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