What
germanium — refine, purify, zone-refine, crystal grow
Notes
Operating. Global leader in germanium crystal pulling; one of few sites able to pull dislocation-free Ge ingots (4"-12"). Produces Ge metal, GeCl4, single-crystal Ge, substrates and lenses. Majority of germanium feed is recycled (2023). Expanding Ge capacity (customer-prepaid, 2026). | output/status: Not disclosed Umicore's Olen refinery and recycling plant produces germanium compounds, germanium metal, single-crystal germanium and substrates, mostly from recycled feed, and pulls dislocation-free crystals up to 12 inches. No plant capacity is published.