Jinshajiangite is a rare silicate mineral named after the Jinshajiang river in China.[4][3] Its currently accepted formula is BaNaFe4Ti2(Si2O7)2O2(OH)2F.[5] It gives a name of the jinshajiangite group.[3] 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[5] and perraultite.[6] It is chemically related to bafertisite, cámaraite[3] and emmerichite.[7] 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.[5]
| Jinshajiangite | |
|---|---|
 Jinshajiangite crystals. Locality: Luku Mine, Panzhihua, Sichuan Province, China | |
| General | |
| Category | Sorosilicate |
| Formula (repeating unit) | BaNaFe4Ti2(Si2O7)2O2(OH)2F |
| IMA symbol | Jsh[1] |
| Strunz classification | 9.BE.67 |
| Crystal system | Monoclinic |
| Crystal class | Prismatic (2/m) (same H-M symbol) |
| Space group | C2/m |
| Unit cell | a = 10.6785, b = 13.786 c = 20.700 [Å], β = 94.937° |
| Identification | |
| References | [2][3] |
The mineral has only two known places of natural occurrences; a dyke near Jinshajiang River, Sichuan Province and the intrusion of Norra Kärr in Sweden.[8][5]
References
edit- ^ 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.
- ^ Sokolova E, Camara F, Hawthorne FC, 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 (4): 871–883. Bibcode:2009EJMin..21..871S. doi:10.1127/0935-1221/2009/0021-1945.
- ^ a b c d Mindat
- ^ Hong, W., and Fu, P., 1982. Jinshajiangite - a new Ba-Mn-Fe-Ti-bearing silicate mineral. Geochemistry 1, 458-464
- ^ a b c d Rastsvetaeva, R.K.; Chukanov, N.V.; Rozenberg, K.A. (2008). "Crystal Structure of Jinshajiangite from the Norra Kärr Complex (Sweden)". Crystallography Reports. 53 (4): 553–556. Bibcode:2008CryRp..53..553R. doi:10.1134/s1063774508040044. S2CID 96285220.
- ^ Mindat, Perraultite
- ^ Mindat, Emmerichite
- ^ Holtstam, Dan (1998). "Jinshajiangite from the Norra Kärr alkaline intrusion, Jönköping, Sweden". GFF. 120 (4): 373–374. Bibcode:1998GFF...120..373H. doi:10.1080/11035899801204373.
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