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Alleghanyite

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Alleghanyite
Alleghanyite is a moderately rare humite mineral with formula Mn5(SiO4)2(OH)2, belonging to the nesosilicates class. In general its occurrences are related with metamorphic (metamorphosed) manganese deposits. The mineral is named after Alleghany CountyNorth Carolina, USA.

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Mineralogy Database Dictionary

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Alleghanyite

General Information:
 Chemical Formula:
Mn5(SiO4)2(OH)2
 Composition:
(Molecular Weight = 492.87 gm)
Manganese 55.73 % Mn
Silicon 11.40 % Si
Hydrogen 0.41 % 
Oxygen 32.46 % 
 Empirical Formula:
Mn2+5(SiO4)2(OH)2
 Environment:
Manganese vein deposits.
 Locality:
TL: Bald Knob, Alleghany Co., North Carolina, USA.
 Name Origin:
Named after its locality.
Physical Properties:
 Cleavage:
None
 Color:
white, brown, bright pink, or grayish pink.
 Density:
4
 Diaphaniety:
Transparent to Subtransparent to translucent
 Habits:
Massive - Lamellar - Distinctly foliated fine-grained forms., Granular - Generally occurs as anhedral to subhedral crystals in matrix.,
 Hardness:
6-5
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
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Dizionario inglese-italiano 1.0.012

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ALLEGHANYITE
ALLEGHANYITE


| Alleghanyite in Italian | Alleghanyite in Farsi