# Segelerite

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Segelerite
> Markdown URL: https://mediated.wiki/source/Segelerite.md
> Source: https://en.wikipedia.org/wiki/Segelerite
> Source revision: 1169669165
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Infobox mineral
| name        = Segelerite
| SMILES      =
| Jmol        =
| image       = Segelerite-710278.png
| caption     = Pale yellow needle-like crystals of segelerite
| category    = [Phosphate minerals](/source/Phosphate_minerals)
| formula     = Ca2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2O
| IMAsymbol   = Sgl<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      = 
| dana        = 
| system      = Orthorhombic
| class       = 
| symmetry    = 
| unit cell   = 
| color       = Green, [chartreuse](/source/Chartreuse_(color)), colorless, pale yellow
| habit       = 
| twinning    = 
| cleavage    = Perfect
| fracture    = 
| tenacity    = 
| toughness   = 
| mohs        = 
| luster      = Vitreous
| streak      = White
| diaphaneity = 
| gravity     = 2.67
| density     = 
| polish      = 
| opticalprop = 
| refractive  = 
| birefringence = 
| pleochroism = 
| 2V          = 
| dispersion  = 
| extinction  = 
| length fast/slow =
| fluorescence = 
| absorption  = 
| melt        = 
| Curie temp  = 
| fusibility  = 
| diagnostic  = 
| solubility  = 
| impurities  = 
| alteration  = 
| other       = 
| prop1       = 
| prop1text   = 
| references  = 
| var1        = 
| var1text    = 
| var2        = 
| var2text    = 
| var3        = 
| var3text    = 
| var4        = 
| var4text    = 
| var5        = 
| var5text    = 
| var6        = 
| var6text    = 
}}
'''Segelerite''' is a complex [phosphate](/source/phosphate) mineral with formula [Ca](/source/calcium)[Mg](/source/magnesium)[Fe](/source/iron)<sup>3+</sup>[O](/source/oxygen)[H](/source/hydrogen)([P](/source/phosphorus)O<sub>4</sub>)<sub>2</sub>'''·'''[H<sub>2</sub>O](/source/water). It occurs in [pegmatite](/source/pegmatite)s and forms striking green or [chartreuse](/source/Chartreuse_(color)) [crystal](/source/crystal)s. It was discovered in 1974 in the [Black Hills](/source/Black_Hills) of [South Dakota](/source/South_Dakota) by an amateur mineralogist from New York, [Curt G. Segeler](/source/Curt_G._Segeler) (1901–1989), after whom it is named.

It is closely related to ''overite'' which is virtually the same mineral except that the iron is replaced by [aluminium](/source/aluminium). Another mineral in the same series is ''juonniite'' wherein the iron is also replaced, this time by [scandium](/source/scandium).

==References==
{{reflist}}
*[http://webmineral.com/data/Segelerite.shtml Webmineral.com - Segelerite]
*[http://www.mindat.org/min-3605.html Mindat.org - Segelerite]
*[http://www.handbookofmineralogy.com/pdfs/segelerite.pdf Handbook of Mineralogy - Segelerite]

Category:Calcium minerals
Category:Magnesium minerals
Category:Iron(III) minerals
Category:Phosphate minerals
Category:Orthorhombic minerals
Category:Minerals in space group 61

{{Phosphate-mineral-stub}}

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