European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 36, issue 1
Articles | Volume 36, issue 1
https://doi.org/10.5194/ejm-36-247-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-36-247-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 36, issue 1
Research article
 | 
01 Mar 2024
Research article |  | 01 Mar 2024

Crystal chemistry and molar volume of potassic-chloro-hastingsite

Jared P. Matteucci, David M. Jenkins, and M. Darby Dyar

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Short summary
To explore the compositional constraints on Cl incorporation into amphiboles, which can be used to characterize transient brines, amphiboles were synthesized with a broad range of Cl concentrations. Amphibole Cl was found to be dependent on the Fe2+,3+ content, but not the tetrahedral Al content or K / Na ratio. Cl incorporation was found to contract the unit cell along a and expand it along b and c. Molar volumes were derived for endmember Cl-amphiboles using multivariate regressions.
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