Hafnium: social and political problems

What problems does it cause between people, and who carries them?

Few public disputes involve hafnium. The best-known was about a hafnium bomb. From 1999, a group claimed that X-rays could release energy stored in a hafnium isomer. Several well-known nuclear physicists doubted it, and US funding was cut. Little is published about workers.

Last updated 14 October 2026.

Conflict and disputes

We found no source that connects hafnium to armed conflict. The disputes we found are about trade. After China issued its list of dual-use items for export control in September 2024, Argus reported long delays to hafnium export licenses¹. In April 2025, Argus gave a US tariff of 79% on hafnium from China¹ (see power).

Workers and communities

Hafnium is made in a few chemical and metal plants. The European Commission found no full information on health and safety at these plants². It names two risks. Hydrochloric acid vapor can leak during some maintenance work². A safety exercise at the Areva plant in France looked at a chlorine leak, with possible effects up to 6.4 km away².

In 2023, a Chinese producer of hafnium crystal bar in Jiangxi told Argus that its plant had been stopped since April because of environmental inspections³.

The risks of mining zircon sands are on the zirconium page.

Who gains and who loses

The hafnium market is small. The European Commission estimated world output at about 70 tonnes a year in 2012 to 2016². We give no money value for the market. The only world tonnage is for 2012 to 2016. The price changed a lot after that. The Argus average was $3,800 per kilogram in 2025⁴, and public quotes passed $14,000 per kilogram in June 2026 (see market). The few refiners of nuclear-grade zirconium sell the hafnium (see power). The European Commission calls the EU a major exporter of hafnium².

Buyers lost when prices rose in 2022 and 2023. A trader at Lipmann Walton told Reuters that hafnium was short by 5 to 10 tonnes in 2022⁵. In 2022, Argus wrote that French suppliers were reported to be sold out⁶.

Public debate

The best-known debate was about a hafnium bomb. Hafnium-178m2 is an excited state of the hafnium nucleus. Normally, it has a half-life of 31 years⁷. From 1999, a group led by Carl Collins reported that X-rays could make it release its energy⁷.

Collins said that a golf ball of the isomer would hold the energy of 10 tons of explosive⁷. A number of well-known nuclear physicists called the claims implausible and unproven in public⁷.

Other physicists tested the claim. A group at Argonne National Laboratory, in experiments with far stronger X-ray beams, found no faster decay of the isomer⁷. The Institute for Defense Analyses reviewed the evidence for the US Department of Defense. In 2002, it called the first paper of 1999 flawed⁷. Collins said that the Argonne targets were badly designed or held too little of the isomer⁷.

In 2004, DARPA cut its hafnium isomer budget of $30 million for two years by about half⁷.

Peter Zimmerman was science adviser to the US assistant secretary of state for arms control. He gave his own account in 2007⁸. He asked the JASON group of scientists to study the physics⁸. After a Washington Post magazine article, he wrote, a law stopped the Department of Defense from paying for isomer research⁸.

Sources

1
Argus Media (Cristina Belda), 2025. Fresh concerns over the US' 80pc tariff on hafnium .

The US tariff on hafnium from China in April 2025, Chinese export licences after September 2024, and the four producing countries.
- Since China issued an export control list for dual-use items in September 2024, there have been extensive delays to the export license approvals process for hafnium.
- Hafnium now faces a 79pc tariff, up from 25pc, after multiple increases since Trump took office in January.
2
European Commission (G.A. Blengini and others), 2020. Study on the EU's list of Critical Raw Materials (2020): Factsheets on Critical Raw Materials , Chapter 12, Hafnium (pp. 253-266).

World production 2012-2016, producers, uses, recycling, prices, trade measures, the name.
- There is no comprehensive information available on health and safety issues.
- At the production process, hydrochloric acid vapours can leak from the processing unit, in exceptional cases of the maintenance procedures (CEZUS, 2008).
- the leakage of chlorine with possible effects of up to a distance of 6400 m (AREVA, 2012)
- Global production of hafnium between 2012 and 2016 amounted on average to . 70 tonnes per year
- the EU has no import reliance and at the same time is a major global hafnium exporter (mainly France and Germany, mainly to the US)
3
Argus Media, 2023. Limited supply, higher demand bolster China's Hf prices .

The record hafnium price of July 2023, Chinese supply, export permits and a plant stopped by environmental inspections.
- We plan to restart production in August after a suspension since the start of April caused by environmental inspections
4
U.S. Geological Survey (Shelby N. Johnston), 2026. Zirconium and Hafnium, in Mineral Commodity Summaries 2026 , Pp. 1-2: production and use, salient statistics (hafnium rows), events, world production and reserves, resources, substitutes, footnote 6.

Hafnium prices from 2021 to 2025, US trade in hafnium, import sources, recycling, substitutes, and the statement that world data are not available.
- Hafnium, unwrought,6 dollars per kilogram … 3,800
5
Reuters (Seher Dareen), republished by Kitco, 2023. Aerospace, electronic demand drive hafnium's 400% record surge .

The price rise of 2022, traders' estimates of supply, Russian export licences, chip demand.
- Lipmann Walton’s Michael Husakiewicz said shortages of hafnium were between five and 10 tonnes last year.
6
Argus Media, 2022. Hafnium prices surge as supply concerns build .

Hafnium prices in 2022, the industry estimate of world supply, producing countries, US duty on Chinese material.
- French suppliers are reportedly sold out
7
Physics Today (Bertram M. Schwarzschild), 2004. Conflicting results on a long-lived nuclear isomer of hafnium have wider implications .

The hafnium-178m2 isomer, the claims of a weapon, the doubts of physicists, and the DARPA budget cut.
- Normally, the isomer’s halflife is 31 years.
- Since 1999, a collaboration led by Carl Collins (University of Texas at Dallas) has been reporting evidence for the x-ray induced release of energy stored in an unusually long-lived nuclear isomer of hafnium-178.
- a golf ball filled with the isomer would have the energy content of 10 tons of explosive
- a number of prominent nuclear physicists publicly characterize Collins’s claims as quite implausible a priori and completely unproven
- whose intensity exceeded that of Collins’s x-ray unit by about five orders of magnitude
- No acceleration of the decay of 178Hfm2 was found in an experiment at Argonne National Laboratory
- The IDA study, completed in September 2002, expressed the harsh conclusion that the Texas collaboration’s initial 1999 paper … was flawed and should not have passed peer review.
- the APS experiment couldn’t see the effect because the aluminum in its … target design was shielding the Hf nuclei
- Collins dismissed the second null result, arguing that the redesigned Argonne target contained too little of the isomer.
- DARPA cut its two-year $30 million Hf-isomer budget for fiscal years 2004 and 2005 roughly in half
8
Peter D. Zimmerman, APS News, 2007. The Back Page (APS News, June 2007) .

A former US State Department scientist's own account of the hafnium bomb debate.
- Ambassador Avis T. Bohlen became assistant secretary of state for arms control, and I became her science adviser.
- To get the best possible physics analysis I turned to the JASON consulting group
- Hafnium became the subject of the cover article of a Washington Post Sunday Magazine few months later
- within months the law forbade DOD to spend its money on isomers