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Hiärneite

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Hiärneite
General
CategoryOxide mineral
Formula
(repeating unit)
(Ca,Mn,Na)2(Zr,Mn3+)5(Sb,Ti,Fe)2O16
IMA symbolHiä[1]
Strunz classification4.DL.10
Crystal systemTetragonal
Crystal classDitetragonal dipyramidal (4/mmm)
H-M symbol: (4/m 2/m 2/m)
Space groupI41/acd
Unit cella = 15.264 Å,
c = 10.089 Å; Z = 8
Identification
ColorRed
Crystal habitPrismatic, subhedral
CleavageNone
Mohs scale hardness7
DiaphaneityTranslucent
Specific gravity5.44
Optical propertiesUniaxial (+)
Refractive indexnω = 2.120 nε = 2.160
Birefringenceδ = 0.040
References[2][3]

Hiärneite is an oxide mineral named after the Swedish geologist Urban Hiärne (1641–1727).[4] The mineral can be found in rocks that mainly consists of fine grained phlogopite. Hiärneite is the first known mineral that contains both of the chemical elements antimony and zirconium.[5] The mineral was described in 1997 for its occurrence in a skarn environment in Långban iron–manganese deposit of the Filipstad district, Värmland, Sweden.[6][3]

Sources

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  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.
  2. ^ Hiärneite on Mindat.org
  3. ^ a b Hiärneite data on Webmineral
  4. ^ Nationalencyklopedin online
  5. ^ from Naturhistoriska riksmuseet (translation from Swedish ~: Swedish Museum of Natural History) Archived 2013-12-02 at the Wayback Machine
  6. ^ Martin, R. F. and W. H. Blackburn, Encyclopedia of Mineral Names: First Update, The Canadian Mineralogist, 1999. Vol.37, p 1154