Chemistry:Tienshanite
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| Tienshanite | |
|---|---|
 | |
| General | |
| Category | Cyclosilicate |
| Formula (repeating unit) | KNa 3(Na,K,[]) 6(Ca,Y,RE) 2Ba 6(Mn2+,Fe2+,Zn,Ti) 6(Ti,Nb) 6Si 36B 12O 114[O 5.5(OH,F) 3.5]F 2 |
| Strunz classification | 9.CL.05 |
| Crystal system | Hexagonal |
| Crystal class | Dipyramidal (6/m) H-M symbol: (6/m) |
| Space group | Hexagonal Space group: P6/m |
| Identification | |
| Color | olive-green |
| Mohs scale hardness | 6 – 6 1⁄2 |
| |re|er}} | vitreous |
| References | [1][2] |
Tienshanite, named for the Tian Shan Range in Mongolia, is a rare borosilicate mineral, though rock-forming in some parts of its original locality at the Dara-i-Pioz Glacier in Tajikistan.[1][2][4] Its formula is extremely complex: KNa
3(Na,K,[])
6(Ca,Y,RE)
2Ba
6(Mn2+,Fe2+,Zn,Ti)
6(Ti,Nb)
6Si
36B
12O
114[O
5.5(OH,F)
3.5]F
2.[5]
References
- ↑ 1.0 1.1 Mindat.org – Tienshanite
- ↑ 2.0 2.1 Webmineral.com – Tienshanite
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
- ↑ Handbook of Mineralogy – Tienshanite
- ↑ Cooper M. A., Hawthorne F. C. and Grew E. S. 1998: Refinement of the crystal structure of tienshanite: short-range-order constrains on chemical composition. The Canadian Mineralogist, 36, pp. 1305–1310
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