Altisite Explained
| Altisite |
| Formula: | Na3K6Ti2Al2Si8O26Cl3 |
| Imasymbol: | Ati |
| Color: | Colourless |
| Cleavage: | None Observed |
| Fracture: | Conchoidal |
| Mohs: | 6 |
| Luster: | Vitreous |
| Streak: | White |
| Gravity: | 2.64 |
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]
Notes and References
- Warr. L.N.. 2021. IMA-CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3. 291–320. 10.1180/mgm.2021.43. 2021MinM...85..291W. 235729616. free.
- Ferraris G., Khomyakov A. P.,and Ivaldi G. 1995: Altisite Na3K6Ti2[Al<sub>2</sub>Si<sub>8</sub>O<sub>26</sub>]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, http://www.minsocam.org/MSA/AmMin/TOC/Articles_Free/1996/Jambor_p516-520_96.pdf
- http://www.mindat.org/min-150.html Mindat
- http://webmineral.com/data/Altisite.shtml Webmineral
