Jinshajiangite
Jinshajiangite crystals. Locality: Luku Mine, Panzhihua, Sichuan Province, China
General
CategorySorosilicate
Formula
(repeating unit)		BaNaFe4Ti2(Si2O7)2O2(OH)2F
IMA symbolJsh[1]
Strunz classification9.BE.67
Crystal systemMonoclinic
Crystal classPrismatic (2/m)
(same H-M symbol)
Space groupC2/m
Unit cella = 10.6785, b = 13.786
c = 20.700 [Å], β = 94.937°
Identification
References[2][3]

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]

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

  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. ↑ 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.
  3. 1 2 3 4 Mindat
  4. ↑ Hong, W., and Fu, P., 1982. Jinshajiangite - a new Ba-Mn-Fe-Ti-bearing silicate mineral. Geochemistry 1, 458-464
  5. 1 2 3 4 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.
  6. ↑ Mindat, Perraultite
  7. ↑ Mindat, Emmerichite
  8. ↑ Holtstam, Dan (1998). "Jinshajiangite from the Norra Kärr alkaline intrusion, Jönköping, Sweden". GFF. 120 (4): 373–374. doi:10.1080/11035899801204373.


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