Jinshajiangite
| Jinshajiangite | |
|---|---|
| General | |
| Category | Sorosilicate |
| Formula (repeating unit) | BaNaFe4Ti2(Si2O7)2O2(OH)2F |
| Strunz classification | 9.BE.67 |
| Crystal system | Monoclinic |
| Crystal class |
Prismatic (2/m) H-M symbol: (2/m) |
| Space group | C2/m |
| Unit cell |
a = 10.6785, b = 13.786 c = 20.700 [Å], β = 94.937° |
| Identification | |
| References | [1][2] |
Jinshajiangite is a rare silicate mineral named after the Jinshajiang river in China.[3][2] Its currently accepted formula is BaNaFe4Ti2(Si2O7)2O2(OH)2F.[4] It gives a name of the jinshajiangite group.[2] The mineral is associated with alkaline rocks. In jinshajiangite, there is a potassium-to-barium, calcium-to-sodium, manganese-to-iron and iron-to-titanium diadochy substitution. Jinshajiangite is the iron-analogue of surkhobite[4] and perraultite.[5] It is chemically related to bafertisite, cámaraite[2] and emmerichite.[6] Its structure is related to that of bafertisite. Jinshajiangite is a titanosilicate with heteropolyhedral HOH layers, where the H-layer is a mixed tetrahedral-octahedral layer, and the O-layer is simply octahedral.[4]
References
- ↑ Sokolova E, Camara F, Hawthorne F C, Abdu Y (2009). "From structure topology to chemical composition. VII. Titanium silicates: the crystal structure and crystal chemistry of jinshajiangite". European Journal of Mineralogy. 21: 871–883.
- 1 2 3 4 Mindat
- ↑ Hong, W., and Fu, P., 1982. Jinshajiangite - a new Ba-Mn-Fe-Ti-bearing silicate mineral. Geochemistry 1, 458-464
- 1 2 3 Rastsvetaeva, R.K., Chukanov, N.V., and Rozenberg K.A., 2008. Crystal structure of jinshajiangite from the Norra Kärr Complex (Sweden), Crystallography Reports, 53, 553-556
- ↑ Mindat, Perraultite
- ↑ Mindat, Emmerichite
This article is issued from Wikipedia - version of the 10/15/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.