alleghanyite
Sign in to saveAlleghanyite 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 County, North Carolina, US.
Key facts
- Mineral.name
- Alleghanyite
- Mineral.category
- Nesosilicates Humite group
- Mineral.image
- Alleghanyite-21573.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Alleghanyite crystals up to 2 mm in size in a mixed franklinite/calcite/willemite block of 11×6.5×4 cm size. Location: Sterling Mine, Sussex County, New Jersey, US.
- Mineral.formula
- Mn5(SiO4)2(OH)2
- Mineral.IMAsymbol
- Alh
- Mineral.molweight
- 492.87 g/mol
- Mineral.strunz
- 9.AF.45
- Mineral.dana
- 52.3.2b.1
- Mineral.system
- Monoclinic
- Mineral.class
- Prismatic (2/m) (same H-M symbol)
- Mineral.symmetry
- P21/a
- Mineral.unit cell
- a = 10.46, b = 4.86 c = 8.3 [Å]; β = 109.133°; Z = 2
- Mineral.color
- Brown, bright pink, grayish pink, white
- Mineral.habit
- Granular; anhedral to subhedral crystals in matrix
- Mineral.cleavage
- None
- Mineral.fracture
- Conchoidal
via Wikipedia infobox
Wikidata facts
- Named after
- Alleghany County
- Image
- Alleghanyite-21573.jpg
Show 7 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.AF.45
- Nickel-Strunz 9th edition (updated 2009)
- 9.AF.45
- Commons category
- Alleghanyite
- crystal system
- monoclinic crystal system
- IMA Mineral Symbol
- Alh
- chemical formula
- Mn²⁺₅(SiO₄)₂(OH)₂
- Strunz 8th edition (series ID, updated)
- VIII/A’.04
via Wikidata · CC0
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Encyclopedic overview
2 sectionsContents
- See also
- References
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 County, North Carolina, US.
==See also== Chondrodite Clinohumite Humite Jerrygibbsite
Excerpted from Wikipedia’s “alleghanyite” article, available under the CC BY-SA 4.0 licence.