Categories
  • Titanium minerals
  • Sodium minerals
  • Potassium minerals
  • Monoclinic minerals
  • Minerals in space group 12
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    Altisite

    Topic: Chemistry

     From Handwiki - Reading time: 1 min
    Altisite
    General
    CategoryMineral
    Formula
    (repeating unit)    		Na3K6Ti2Al2Si8O26Cl3
    Identification
    ColorColourless
    CleavageNone Observed
    FractureConchoidal
    Mohs scale hardness6
    |re|er}}Vitreous
    StreakWhite
    Specific gravity2.64

    Altisite (IMA symbol: Ati[1]) is an exceedingly rare alkaline titanium aluminosilicate chloride mineral with formula Na3K6Ti2Al2Si8O26Cl3, from alkaline pegmatites. It is named after its composition (ALuminium, TItanium, and SIlicon).[2][3][4]

    The mineral crystallizes in the monoclinic crystal system with space group C2/m.[2]

    References

    1. ↑ 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. 
    2. ↑ 2.0 2.1 Ferraris G., Khomyakov A. P.,and Ivaldi G. 1995: Altisite Na3K6Ti2[Al2Si8O26]Cl3 a new hyperalkaline aluminosilicate from Kola Peninsula (Russia) related to lemoynite: Crystal structure and thermal evolution. Eur. J. Mineral., 7, 537–546 in Jambor J. L., Pertsev N. N. i Roberts A. C. 1996: New mineral names. Am. Min., 81, 516-520, [1]
    3. ↑ http://www.mindat.org/min-150.html Mindat
    4. ↑ http://webmineral.com/data/Altisite.shtml Webmineral




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