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) ; (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	[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]

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.[7][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. doi:10.1127/0935-1221/2009/0021-1945.CS1 maint: uses authors parameter (link)
Mindat
Hong, W., and Fu, P., 1982. Jinshajiangite - a new Ba-Mn-Fe-Ti-bearing silicate mineral. Geochemistry 1, 458-464
Rastsvetaeva, R.K.; Chukanov, N.V.; Rozenberg, K.A. (2008). "Crystal Structure of Jinshajiangite from the Norra Kärr Complex (Sweden)" (PDF). Crystallography Reports. 53 (4): 553–556. doi:10.1134/s1063774508040044.
Mindat, Perraultite
Mindat, Emmerichite
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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[1] 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. doi:10.1127/0935-1221/2009/0021-1945.CS1 maint: uses authors parameter (link)

[Mindat-2] Mindat

[3] Hong, W., and Fu, P., 1982. Jinshajiangite - a new Ba-Mn-Fe-Ti-bearing silicate mineral. Geochemistry 1, 458-464

[R-4] Rastsvetaeva, R.K.; Chukanov, N.V.; Rozenberg, K.A. (2008). "Crystal Structure of Jinshajiangite from the Norra Kärr Complex (Sweden)" (PDF). Crystallography Reports. 53 (4): 553–556. doi:10.1134/s1063774508040044.

[5] Mindat, Perraultite

[6] Mindat, Emmerichite

[7] Holtstam, Dan (1998). "Jinshajiangite from the Norra Kärr alkaline intrusion, Jönköping, Sweden". GFF. 120 (4): 373–374. doi:10.1080/11035899801204373.