Polonium is commercially real only in very small isotope markets. The main industrial isotope is Po-210, which the NRC says is produced in reactors, used mainly in static eliminators, and manufactured worldwide at only about 100 grams per year. In the device supply chain, the isotope is embedded in silver-bearing or similar foil inside protective cages rather than traded as free metal. Source: `nrc_polonium_2024`.

The present U.S. catalog evidence for broader polonium commerce is DOE/NIDC's Po-209 product sheet, which offers stock material in nitric-acid solution and quotes it in microcuries. That makes polonium a clear fit for the atlas isotope-market pattern: reactor or legacy-inventory supply, radiological controls, no transparent country-share tables, and no public bulk price series. The most important commercial constraint is not ore or smelting capacity but regulatory control of source fabrication, containment, and disposal. Sources: `nidc_po209_product_2024`, `osti_static_eliminators_1999`, `nea_bi209_capture_2022`.