Assertion: germanium | /r/HasProperty | concentrated in amounts of up to 0.3%
Facets:
Source sentences:
text: Germanium is recovered as a by-product from sphalerite zinc ores where it is concentrated in amounts of up to 0.3%, especially from sediment-hosted, massive Zn–Pb–Cu(–Ba) deposits and carbonate-hosted Zn–Pb deposits.