{{Infobox mineral | name = Tienshanite | boxwidth = | boxbgcolor = | image = Tienshanite.jpg | imagesize = | alt = | caption = | category = Cyclosilicate | formula = {{chem2|KNa3(Na,K,[])6(Ca,Y,RE)2Ba6(Mn(2+),Fe(2+),Zn,Ti)6(Ti,Nb)6Si36B12O114[O5.5(OH,F)3.5]F2}} | IMAsymbol = Tsh<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3|pages=291–320|doi=10.1180/mgm.2021.43|bibcode=2021MinM...85..291W|s2cid=235729616|doi-access=free}}</ref> | molweight = | strunz = 9.CL.05 | system = Hexagonal | class = Dipyramidal (6/m) <br/>H-M symbol: (6/m) | symmetry = Hexagonal <br/>Space group: ''P6/m'' | unit cell = | color = olive-green | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = 6 – {{frac|6|1|2}} | luster = vitreous | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references =<ref name=Mindat /><ref name=Webmin /> }} '''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.<ref name=Mindat>[http://www.mindat.org/min-3958.html Mindat.org – Tienshanite]</ref><ref name=Webmin>[http://webmineral.com/data/Tienshanite.shtml Webmineral.com – Tienshanite]</ref><ref>[http://www.handbookofmineralogy.com/pdfs/tienshanite.pdf Handbook of Mineralogy – Tienshanite]</ref> Its formula is extremely complex: {{chem2|KNa3(Na,K,[])6(Ca,Y,RE)2Ba6(Mn(2+),Fe(2+),Zn,Ti)6(Ti,Nb)6Si36B12O114[O5.5(OH,F)3.5]F2}}.<ref>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</ref>
==References== {{reflist}}
Category:Borate minerals Category:Cyclosilicates Category:Hexagonal minerals Category:Minerals in space group 175 Category:Borosilicates
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