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1 References  














Hazenite






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From Wikipedia, the free encyclopedia
 


Hazenite
General
CategoryPhosphate mineral
Struvite group
Formula
(repeating unit)
KNaMg2(PO4)2 · 14 H2O
IMA symbolHz[1]
Strunz classification8.CH.40
Dana classification40.01.01.03
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
H–M Symbol: (2/m 2/m 2/m)
Space groupPmnb
Unit cella = 6.9349, b = 25.1737
c = 11.2189 [Å]; Z = 4
Identification
Formula mass276.331 g/mol
ColorColorless
Crystal habitRadiating elongated tabular or prismatic clusters or single bladed tabular crystals
Cleavage{001} Good
TenacityBrittle
Mohs scale hardness2 – 2.5
LusterVitreous
StreakWhite
DiaphaneityTransparent
Specific gravity1.91
Optical propertiesBiaxial (+)
Refractive indexnα =1.494(1), nβ = 1.498(1), nγ = 1.503(1)
2V angle41°
DispersionStrong r <v
SolubilityIn water
References[2][3][4]

Hazenite is a hydrous phosphate mineral with chemical formula of KNaMg2(PO4)2 ·14H2O, therefore a hydrous alkali magnesium phosphate. It is a member of the struvite group.[4]

It was first described for an occurrence adjacent to Mono Lake, California, and named after Robert M. Hazen of the Carnegie Institute.[5] It was approved as a new mineral on February 28, 2008 by the Commission on New Minerals of the International Mineralogical Association.

It occurs as crystal clusters associated with decomposed cyanobacteria remnants on calciteoraragonite.[4] It is precipitated by microbes when the lake has been dry for so long that phosphorus levels build up, poisoning the microbes. They dispose of the excess phosphorus by excreting hazenite crystals.[6] The crystals disappear when it rains or the lake level rises.[7]

References[edit]

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  • ^ "Hazenite". mindat.org. Hudson Institute of Mineralogy. Retrieved 15 May 2018.
  • ^ Yang, H.; Sun, H. J.; Downs, R. T. (21 March 2011). "Hazenite, KNaMg2(PO4)2{middle dot}14H2O, a new biologically related phosphate mineral, from Mono Lake, California, U.S.A.". American Mineralogist. 96 (4): 675–681. doi:10.2138/am.2011.3668. S2CID 97332746.
  • ^ a b c Barthelmy, Dave. "Hazenite Mineral Data". webmineral.com. Retrieved 15 May 2018.
  • ^ "New mineral to be named "Hazenite" after Robert Hazen". Geophysical Laboratory. Carnegie Institution of Washington. Archived from the original on 16 May 2018. Retrieved 15 May 2018.
  • ^ Hazen told the Los Angeles Times, "They're basically microbial poop. People tell me, 'Hazenite happens.'" (Netburn, Deborah (13 February 2016). "Way beyond diamonds: A look at some of the rarest minerals in the world". Los Angeles Times. Retrieved 15 May 2018.)
  • ^ Wernick, Adam (21 May 2017). "Evidence that we are in the Age of Man: Scientists catalog more human-made minerals". 90.5 WESA. World Media Foundation. Retrieved 15 May 2018.

  • Retrieved from "https://en.wikipedia.org/w/index.php?title=Hazenite&oldid=1196899995"

    Categories: 
    Potassium minerals
    Sodium minerals
    Magnesium minerals
    Phosphate minerals
    Orthorhombic minerals
    Minerals in space group 62
    Hidden categories: 
    Articles with short description
    Short description matches Wikidata
     



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