Tienshanite
| Tienshanite | |
|---|---|
 | |
| General | |
| Category | Cyclosilicate |
| Formula | KNa3(Na,K,[])6(Ca,Y,RE)2Ba6(Mn2+,Fe2+,Zn,Ti)6(Ti,Nb)6Si36B12O114[O5.5(OH,F)3.5]F2 |
| IMA symbol | Tsh[1] |
| 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 |
| Luster | vitreous |
| References | [2][3] |
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.[2][3][4] Its formula is extremely complex: KNa3(Na,K,[])6(Ca,Y,RE)2Ba6(Mn2+,Fe2+,Zn,Ti)6(Ti,Nb)6Si36B12O114[O5.5(OH,F)3.5]F2.[5]
References
- ^ 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.
- ^ a b Mindat.org – Tienshanite
- ^ a b Webmineral.com – Tienshanite
- ^ 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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