Chemistry:Sodalite group
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| Sodalite group | |
|---|---|
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| General | |
| Category | Tectosilicate minerals |
| Identification | |
| References | [1] |
The sodalite group is a mineral group of feldspathoid minerals with a zeolitic[2] crystal structure similar to that of the eponymous sodalite. In zeolite chemistry, the sodalite structure is abbreviated as SOD.[citation needed]
Structure
The primary structure of sodalite-group minerals is a framework of truncated octahedral aluminosilicate "cages" surrounding smaller extra-framework anions and cations that serve to balance the charge. Specific ions are characteristic of specific members of the group, with partial substitution giving rise to varities such as hackmanite.[1]
Members
The sodalite group includes the following minerals:[3]
- Haüyne — Na
3Ca(Si
3Al
3)O
12(SO
4) - Sodalite — Na
4(Al
3Si
3)O
12Cl - Nosean — Na
8(Al
6Si
6)O
24(SO
4) · H2O - Lazurite — Na
3Ca(Si
3Al
3)O
12S - Tsaregorodtsevite — N(CH
3)
4Si
4(SiAl)O
12 - Tugtupite — Na
4BeAlSi
4O
12Cl - Vladimirivanovite — Na Na
6Ca
2[Al
6Si
6O
24](SO
4,S
3,S
2,Cl)
2 · H2O
The characteristic blue color of sodalite-group minerals arises mainly from caged S−
3 and S
4 clusters.[4]
References
- ↑ 1.0 1.1 Sodalite group, MinDat.org, http://www.mindat.org/show.php?id=29220
- ↑ "Sodalites and Zeolites". University of Minnesota. https://stein.chem.umn.edu/content/sodalites-and-zeolites.
- ↑ "IMA Mineral List – RRUFF – Comprehensive Database of Mineral Data". https://www.rruff.net/ima-mineral-list/.
- ↑ Chukanov, Nikita V.; Sapozhnikov, Anatoly N.; Shendrik, Roman Yu.; Vigasina, Marina F.; Steudel, Ralf (23 November 2020). "Spectroscopic and Crystal-Chemical Features of Sodalite-Group Minerals from Gem Lazurite Deposits". Minerals 10 (11): 1042. doi:10.3390/min10111042. Bibcode: 2020Mine...10.1042C.
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