Lithium ions substitute for magnesium and iron in octahedral sites in clay minerals, where 6Li is preferred to 7Li, resulting in enrichment of the light isotope in processes of hyperfiltration and rock alteration.
Lithiumioner substituerer for magnesium og jern i oktaedriske steder i lermineraler, hvor 6Li foretrækkes frem for 7Li, hvilket resulterer i berigelse af den lette isotop ved hyperfiltrering og klippeforandring.