# Sampleite

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> Markdown URL: https://mediated.wiki/source/Sampleite.md
> Source: https://en.wikipedia.org/wiki/Sampleite
> Source revision: 1335847888
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Phosphate mineral}}
{{Infobox mineral
| name        = Sampleite
| category    = [Phosphate minerals](/source/Phosphate_minerals)
| boxwidth    = 
| boxbgcolor  = 
| image       = Sampleite 04.JPG
| imagesize   = 260px
| caption     = 
| formula     = NaCaCu<sub>5</sub>(PO<sub>4</sub>)<sub>4</sub>Cl•5(H<sub>2</sub>O)
| IMAsymbol   = Smp<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   = 875.95 g/mol
| strunz      = 8.DG.05
| system      = [Monoclinic](/source/Monoclinic)
| class       = Prismatic (2/m) <br/><small>(same [H-M symbol](/source/H-M_symbol))</small>
| symmetry    = ''P''2<sub>1</sub>/n or ''P''2<sub>1</sub>/c
| unit cell   = a = 9.7&nbsp;[Å](/source/%C3%85ngstr%C3%B6m), b = 38.4&nbsp;Å <br/>c = 9.65&nbsp;Å; β = 90.07°; Z&nbsp;=&nbsp;4
| color       = Light blue to blue-green
| habit       = Aggregates, lath, rosette 
| twinning    = 
| cleavage    = Perfect on {010}; good on {100} and {001} 
| fracture    = 
| tenacity    = 
| mohs  = 4
| luster      = Pearly
| refractive  = n<sub>α</sub> = 1.629 n<sub>β</sub> = 1.677 n<sub>γ</sub> = 1.679
| opticalprop = Biaxial (−)
| 2V = Measured: 5° to 23°
| birefringence = δ = 0.050
| pleochroism = X = deep blue, blue-green; Y = light blue, turquoise blue; Z = turquoise-blue, colorless
| streak      = Light Blue
| gravity     = 3.2
| density     = 
| melt        = 
| fusibility  = 
| diagnostic  = 
| solubility  = 
| diaphaneity = Transparent
| other       = 
| references  = <ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/sampleite.pdf Handbook of Mineralogy]</ref><ref name=Mindat>[http://www.mindat.org/min-3515.html Mindat.org]</ref><ref name=Webmin>[http://webmineral.com/data/Sampleite.shtml Webmineral data]</ref>
}}
'''Sampleite''' has a general [formula](/source/chemical_formula) of NaCaCu<sub>5</sub>(PO<sub>4</sub>)<sub>4</sub>Cl·5(H<sub>2</sub>O).<ref name=Webmin/>  It was first described in 1942 for an occurrence in [Chuquicamata, Chile](/source/Chuquicamata%2C_Chile) and was named after Mat Sample, a mine superintendent for the [Chile Exploration Company](/source/Chile_Exploration_Company).<ref name=Mindat/>

Sampleite is monoclinic. It belongs to the [space group](/source/space_group) ''P''2<sub>1</sub>/n or ''P''2<sub>1</sub>/c.<ref>[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Sampleite Mineralienatlas]</ref><ref>Campbell, T.J., Rapp, G.R., Roberts, W.L. (1990) Encyclopedia of Minerals (2nd Edition) 753 p. Library of Congress Cataloging, Washington D.C.</ref> In a thin section it has a high surface relief and will have sharp boundaries with the surrounding medium. Sampleite is [anisotropic](/source/anisotropic) and has visible [pleochroism](/source/pleochroism) and [birefringence](/source/birefringence).

It is characteristically found in earthy crusts in a highly [sericitized](/source/sericite) rock and is present in highly oxidized conditions near the surface. When it occurs as [micaceous](/source/micaceous) rosettes and aggregates it can be associated with dendrites of manganese and iron oxides. Sampleite appears to be the most recent mineral deposited with the exception of gypsum.<ref>Hulbert, C.S. "Sampleite A New Mineral." http://www.minsocam.org/ammin/AM27/AM27_586.pdf. Retrieved 2010-11-11</ref><ref>"Sampleite Mineraology." http://www.wolframalpha.com/entities/minerals/sampleite/fx/0q/75/{{Dead link|date=January 2026 |bot=InternetArchiveBot }}. Retrieved 2010-11-28</ref>

== References ==
{{Reflist}}

==External links==
{{Commons category-inline|Sampleite}}

Category:Sodium minerals
Category:Calcium minerals
Category:Copper(II) minerals
Category:Phosphate minerals
Category:Chloride minerals
Category:Pentahydrate minerals
Category:Monoclinic minerals
Category:Minerals in space group 14
Category:Minerals described in 1942

{{phosphate-mineral-stub}}

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