Hiärneite
| Hiärneite | |
|---|---|
| General | |
| Category | Oxide mineral |
| Formula (repeating unit) | (Ca,Mn,Na)2(Zr,Mn3+)5(Sb,Ti,Fe)2O16 |
| Strunz classification | 4.DL.10 |
| Crystal symmetry |
Tetragonal ditetragonal dipyramidal H-M symbol: (4/m 2/m 2/m) Space group: I 41/acd |
| Unit cell | a = 15.264 Å, c = 10.089 Å, Z = 8 |
| Identification | |
| Color | Red |
| Crystal habit | Prismatic, subhedral |
| Crystal system | Tetragonal |
| 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 | [1][2] |
Hiärneite is an oxide mineral named after the Swedish geologist Urban Hiärne (1641-1727).[3] 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.[4] The mineral was described in 1997 for its occurrence in a skarn environment in Långban iron–manganese deposit of the Filipstad district, Värmland, Sweden.[5][2]
Sources
- ↑ Hiärneite on Mindat.org
- 1 2 Hiärneite data on Webmineral
- ↑ Nationalencyklopedin online
- ↑ from Naturhistoriska riksmuseet (translation from Swedish ~: Swedish Museum of Natural History)
- ↑ Martin, R. F. and W. H. Blackburn, Encyclopedia of Mineral Names: First Update, The Canadian Mineralogist, 1999. Vol.37, p 1154
This article is issued from Wikipedia - version of the Saturday, February 15, 2014. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.