Tantalum — Structural brief

Where tantalum is produced

Democratic Republic of the Congo is the largest producer of tantalum, at 52.3 percent of the published world total in 2025^[1]. It is followed by Rwanda at 16.1 percent, Nigeria at 15.7 percent and Brazil at 7.6 percent. The USGS puts world production at 2,500 metric tons; the sum of the country figures is 2,485 metric tons, the difference being rounding in the published total.^[1] Reserves are held principally by China (240,000 metric tons), Australia (120,000 metric tons), Brazil (40,000 metric tons)^[1]. The largest reserve holder is not the largest producer, which is the usual sign that the constraint is capital and permitting rather than geology.

How concentrated supply is

Measured by the Herfindahl-Hirschman index over production shares, tantalum supply is highly concentrated, with an index of 3,319. The top three producers hold 84.1 percent of output, and a single producer accounts for more than half of supply. An index below 1,500 is conventionally read as unconcentrated and above 2,500 as highly concentrated; the thresholds are the United States merger-review bands, used here as a published reference point rather than as a judgement about market conduct. The United States was entirely reliant on net imports for tantalum in 2025, with the principal import sources over 2021–24 being China, Australia, Germany, Indonesia.^[2] The principal sources of United States imports over 2021–24 were China (22 percent), Australia (14 percent) and Germany (11 percent)^[3].

Trade measures in force

The USGS compilation of export controls effective January 2026 records one measure bearing on tantalum. Venezuela maintains an export ban covering Bauxite, cassiterite, columbite-tantalite, copper, gold, rhodium, silver, and thorium (2024), as compiled by the USGS from official and reported sources effective January 2026.^[4] A control listed here removes the tonnage concerned from the international market by law, whatever the production table implies about availability.

Recent United States official notices

Federal Register documents naming tantalum, most recent first. 2025-11-07: Final 2025 List of Critical Minerals. Critical minerals are essential for national security, economic stability, and supply chain resilience because they underpin key industries, drive technological innovation, and support critical infrastructure vital for a modern American economy. The United States is heavily reliant on imports of certain mineral commodities from foreign sources, some of which are at risk of serious, sustained, and long-term supply chain disruptions.^[5]