Articles | Volume 33, issue 4
Eur. J. Mineral., 33, 503–517, 2021
https://doi.org/10.5194/ejm-33-503-2021
Eur. J. Mineral., 33, 503–517, 2021
https://doi.org/10.5194/ejm-33-503-2021

Research article 20 Aug 2021

Research article | 20 Aug 2021

Textural and genetic relationships between glauconite and celadonite at the nanoscale: two different structural-compositional fields

Fernando Nieto et al.

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Short summary
Glauconite and celadonite are green micas which are significant as indicators of palaeoenvironments. They share similar chemical compositions, characterized by their Fe2+, Fe3+ and Mg content despite their white-mica structure; however, the chemical and structural relations were unknown. Their rare coexistence in volcanic rocks due to bacterial activity has allowed us, after an electron microscopy study, to identify a compositional gap between them justified by structural differences.