Articles | Volume 37, issue 6
https://doi.org/10.5194/ejm-37-877-2025
https://doi.org/10.5194/ejm-37-877-2025
Research article
 | 
25 Nov 2025
Research article |  | 25 Nov 2025

Ordering of tetrahedral and octahedral layers in synthetic lepidolites and Li-muscovites: two-dimensional {1H} → 29Si ∕ 27Al CPMAS HETCOR and {19F} → 29Si ∕ 27Al CPMAS HETCOR spectroscopy

Michael Fechtelkord and Lara Sulcek

Related authors

Cation and anion ordering in synthetic lepidolites and lithian muscovites: influence of the OH ∕ F and Li ∕ Al ratios on the mica formation studied by NMR (nuclear magnetic resonance) spectroscopy and X-ray diffraction
Lara Sulcek, Bernd Marler, and Michael Fechtelkord
Eur. J. Mineral., 35, 199–217, https://doi.org/10.5194/ejm-35-199-2023,https://doi.org/10.5194/ejm-35-199-2023, 2023
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Cited articles

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Boukili, B., Holtz, F., Beny, J.-M., and Robert, J.-L.: “Fe-F and Al-F avoidance rule” in ferrous-aluminous (OH,F) biotites, Schweiz. Miner. Petrog., 82, 549–559, 2002. 
Boukili, B., Robert, J.-L., Beny, J.-M., and Holtz, F.: Structural effects of OH – F substitution in trioctahedral micas of the system: K2O-FeO-Fe2O3-Al2O3-SiO2-H2O-HF, Schweiz. Mineral. Petrogr. Mitt., 81, 55–67, 2001. 
Dingwell, D. B., Scarfe, C. M., and Cronin, D. J.: The effect of fluorine on viscosities in the system Na2O-Al2O3-SiO2: Implications for phonolites, trachytes and rhyolites, Am. Min., 70, 80–87, 1987. 
Dingwell, D. B., Knoche, R., and Webb, S. L.: The effect of F on the density of haplogranite melt, American Mineralogist, 78, 325–330, 1993. 
Short summary
Synthetic lepidolites and Li-muscovites have been investigated using two-dimensional cross-polarisation heteronuclear correlation magic-angle-spinning solid-state nuclear magnetic resonance spectroscopic experiments. All results show a related ordering of the tetrahedral and octahedral sheets, with more tetrahedral Al sites close to Al-rich octahedral sites preferably coordinated by OH- anions and Si-rich tetrahedral regions close to Li-rich octahedral sites preferably coordinated by F- anions.
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