A common mineral that has frustrated scientists for over 300 years may finally be the solution to making copper production cleaner and more efficient.
A team from Monash University’s School of Earth, Atmosphere and Environment has published new research in Nature Geoscience that identifies how the hidden chemistry of chalcopyrite, the world’s primary source of copper, can be harnessed to support the global energy transition.
Chalcopyrite provides roughly 70 per cent of the world’s copper, yet it is notoriously difficult to process.
Its resistance to low-temperature leaching has long been a bottleneck for the mining industry, particularly as demand surges for copper to power electric vehicles, renewable energy systems, and modern infrastructure.
“Chalcopyrite is the world’s primary copper mineral, but it behaves in surprisingly complex ways that have limited how efficiently we can extract copper from it,” said study lead Professor Joël Brugger from the School of Earth, Atmosphere and Environment.
While the mineral was previously thought to have a simple crystal structure, the Monash research reveals it is actually riddled with microscopic defects and trace elements, including silver, gold, and nickel.
These subtle atomic variations act as a gatekeeper, controlling how the mineral reacts during processing and determining final copper recovery rates.
The study specifically highlights that trace amounts of silver can destabilise the mineral’s surface, triggering a chemical cycle that releases copper far more efficiently than existing methods.
“By understanding how trace elements like silver interact with chalcopyrite at the atomic level, we can begin to design smarter, more targeted extraction methods,” said co-author Dr Barbara Etschmann.
“That means less energy, fewer chemicals, and better recovery from the same resource.”
Brugger emphasised that meeting the world’s future copper requirements is not just about discovering new deposits, but about processing existing resources more intelligently.
Beyond the mining sector, the study also has significant implications for clean technology; the atomic structure of chalcopyrite underpins advanced semiconductors used in solar cells and energy conversion devices.
The findings call for a cross-disciplinary approach, urging Earth scientists, chemists, and engineers to collaborate on rethinking mineral processing.
By solving this centuries-old scientific puzzle, researchers hope to secure the critical metals needed for a low-carbon world while significantly reducing the environmental cost of production.