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Spectroscopic and Crystal-Chemical Features of Sodalite-Group Minerals from Gem Lazurite Deposits.
- Source :
- Minerals (2075-163X); Nov2020, Vol. 10 Issue 11, p1042, 1p
- Publication Year :
- 2020
-
Abstract
- Five samples of differently colored sodalite-group minerals from gem lazurite deposits were studied by means of electron microprobe and wet chemical analyses, infrared, Raman, electron spin resonance (ESR) and UV-Visible spectroscopy, and X-ray diffraction. Various extra-framework components (SO<subscript>4</subscript><superscript>2−</superscript>, S<superscript>2−</superscript> and Cl<superscript>−</superscript> anions, S<subscript>3</subscript><superscript>•−</superscript>, S<subscript>2</subscript><superscript>•−</superscript> and SO<subscript>3</subscript><superscript>•−</superscript> radical anions, H<subscript>2</subscript>O, CO<subscript>2</subscript>, COS, cis- as well as trans- or gauche-S<subscript>4</subscript> neutral molecules have been identified. It is shown that S<subscript>3</subscript><superscript>•−</superscript> and S<subscript>4</subscript> are the main blue and purple chromophores, respectively, whereas the S<subscript>2</subscript><superscript>•−</superscript> yellow chromophore and SO<subscript>3</subscript><superscript>•−</superscript> blue chromophore play a subordinate role. X-ray diffraction patterns of all samples of sodalite-group minerals from lazurite deposits studied in this work contain superstructure reflections which indicate different kinds of incommensurate modulation of the structures. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 2075163X
- Volume :
- 10
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Minerals (2075-163X)
- Publication Type :
- Academic Journal
- Accession number :
- 147263219
- Full Text :
- https://doi.org/10.3390/min10111042