Variable refractory lithophile element compositions of planetary building blocks: Insights from components of enstatite chondrites

•Nominally lithophile elements are moderately chalcophile in highly reduced EC.•A separation of reduced sulfides produced RLE fractionation in EC chondrules.•The EC-dominated Earth models require RLE release from reduced sulfides to mantle.•Otherwise, the Earth’s building blocks condensed before a sulfide precipitation.•Nb might be partially siderophile, rather than chalcophile, in the Earth.