Why is the Earth's F/Cl ratio not chondritic?

(Ehime University) It is generally believed that terrestrial planets were made from chondrites. However, geochemical observations have shown that the abundance pattern of volatile elements, such as fluorine and chorine in the Earth is inconsistent with chondrites. New high-pressure experiments on the silicate mineral-melt partitioning of F and Cl suggest that F and Cl fractionation during magma ocean crystallization could explain the non-chondritic Earth's F/Cl ratio.