Why Is It So Green? Discovery of slyudyankaite, a new mineral of the sodalite Group
- Authors: Rastsvetaeva R.K1
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Affiliations:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics”, Russian Academy of Sciences
- Issue: No 8 (2023)
- Pages: 38-40
- Section: Articles
- URL: https://journals.eco-vector.com/0032-874X/article/view/627827
- DOI: https://doi.org/10.7868/S0032874X23080045
- ID: 627827
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Abstract
In this paper the discovering of new sodalite-group mineral species is reported. Slyudyankaite, Na28Ca4(Si24Al24O96)(SO4)6(S6)1/3(CO2)•2H2O, was found in lazurite-bearing rock at the Malo-Bystrinskoe deposit, Baikal Lake area, eastern Siberia, Russia. Its structure contains two kinds of sodalite cages alternating along the c axis. Cages of the first kind are completely occupied by (SO4)2– anions and extra-framework cations, while cages of the second type contain only neutral molecules (S6, CO2, H2O и S4). These structural features lead to lowering the symmetry from cubic to triclinic and the presence of several sulfi de molecules resulted in an unusual green color of its crystals.
About the authors
R. K Rastsvetaeva
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics”, Russian Academy of Sciences
Email: rast.crys@gmail.com
Moscow, Russia
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