Aristarainite

General Information:
 Chemical Formula:
Na2MgB12O20·8(H2O)
 Composition:
(Molecular Weight = 628.08 gm)
Sodium 7.32 % Na
Magnesium 3.87 % Mg
Boron 20.65 % B 
Hydrogen 1.93 % H 
Oxygen 66.23 % O 
 bword://Ti">TiTi
Iron 6.71 % Fe
Oxygen 38.47 % O 
 Empirical Formula:
Mg0.75Fe2+0.25Ti2O5
 Environment:
Ti oxides associated with deep-seated intrusives.
 IMA Status:
Approved IMA 1970
 Locality:
Tranquillity Base, Moon. Smoky Butte, Garfield Co., MT,
 Name Origin:
Named after the three astronauts of Apollo 11: Neil A. ARMstrong, Edwin E. "Buzz" ALdrin, and Michael COLlins.
Physical Properties:
 Color:
gray.
 Density:
4
 Diaphaniety:
Opaque
 Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., ,
 Hardness:
6 - Orthoclase
 Luster:
Metallic
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