Hiärneite
Appearance
Hiärneite | |
---|---|
General | |
Category | Oxide mineral |
Formula (repeating unit) | (Ca,Mn,Na)2(Zr,Mn3+)5(Sb,Ti,Fe)2O16 |
IMA symbol | Hiä[1] |
Strunz classification | 4.DL.10 |
Crystal system | Tetragonal |
Crystal class | Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m) |
Space group | I41/acd |
Unit cell | a = 15.264 Å, c = 10.089 Å; Z = 8 |
Identification | |
Color | Red |
Crystal habit | Prismatic, subhedral |
Cleavage | None |
Mohs scale hardness | 7 |
Diaphaneity | Translucent |
Specific gravity | 5.44 |
Optical properties | Uniaxial (+) |
Refractive index | nω = 2.120 nε = 2.160 |
Birefringence | δ = 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
- ^ 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.
- ^ Hiärneite on Mindat.org
- ^ a b Hiärneite data on Webmineral
- ^ Nationalencyklopedin online
- ^ from Naturhistoriska riksmuseet (translation from Swedish ~: Swedish Museum of Natural History) Archived 2013-12-02 at the Wayback Machine
- ^ Martin, R. F. and W. H. Blackburn, Encyclopedia of Mineral Names: First Update, The Canadian Mineralogist, 1999. Vol.37, p 1154