# Hodgkinsonite

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> Markdown URL: https://mediated.wiki/source/Hodgkinsonite.md
> Source: https://en.wikipedia.org/wiki/Hodgkinsonite
> Source revision: 1208807202
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{{Short description|Nesosilicate mineral}}
{{Infobox mineral
| name        = Hodgkinsonite
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| image       = Hodgkinsonite-256921.jpg
| imagesize   = 260px
| alt         = 
| caption     = Hodgkinsonite from [Franklin Mine](/source/Franklin_Furnace), [Franklin, New Jersey](/source/Franklin%2C_New_Jersey) USA. The translucent and lustrous crystals reach 8 mm and the main crystal here is doubly terminated.
| category    = [Nesosilicate](/source/Nesosilicate)
| formula     = Zn<sub>2</sub>MnSiO<sub>4</sub>(OH)<sub>2</sub>
| IMAsymbol   = Hgk<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref>
| molweight   = 
| strunz      = 9.AE.20
| system      = [Monoclinic](/source/Monoclinic)
| class       = Prismatic (2/m) <br/><small>(same [H-M symbol](/source/H-M_symbol))</small>
| symmetry    = ''P2''<sub>1</sub>/a
| unit cell   = a = 11.76, b = 5.31 <br/>c = 8.18&nbsp;[Å]; β = 95.42°, Z&nbsp;=&nbsp;4
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| mohs        = {{frac|4|1|2}} - 5
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| opticalprop = Biaxial (-)
| refractive  = n<sub>α</sub> = 1.720 n<sub>β</sub> = 1.741 n<sub>γ</sub> = 1.746
| birefringence = δ = 0.026
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| dispersion  = r < v moderate
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}}

'''Hodgkinsonite''' is a rare [zinc](/source/zinc) [manganese](/source/manganese) [silicate mineral](/source/silicate_mineral) Zn<sub>2</sub>MnSiO<sub>4</sub>(OH)<sub>2</sub>. It crystallizes in the [monoclinic](/source/monoclinic) system and typically forms radiating to acicular prismatic crystals with variable color from pink, yellow-red to deep red.  Hodgkinsonite was discovered in 1913 by H. H. Hodgkinson, for whom it is named in [Franklin, New Jersey](/source/Franklin%2C_New_Jersey), and it is only found in that area.<ref>[http://mineral.galleries.com/minerals/silicate/hodgkins/hodgkins.htm Mineral Galleries] {{Webarchive|url=https://web.archive.org/web/20081018221324/http://mineral.galleries.com/minerals/silicate/hodgkins/hodgkins.htm |date=2008-10-18 }}. Accessed August 22, 2008.</ref>

==References==
{{Reflist}}
*http://rruff.geo.arizona.edu/doclib/hom/hodgkinsonite.pdf Manual of Mineralogy
*http://webmineral.com/data/Hodgkinsonite.shtml Webmineral
*http://www.mindat.org/min-1913.html Mindat
==External links==

*http://franklin-sterlinghill.com/palache/hodgkinsonite.stm
{{Commons}}

Category:Nesosilicates
Category:Geology of New Jersey
Category:Monoclinic minerals
Category:Minerals in space group 14

{{silicate-mineral-stub}}

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Adapted from the Wikipedia article [Hodgkinsonite](https://en.wikipedia.org/wiki/Hodgkinsonite) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Hodgkinsonite?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.