Researchers at Monash University in Australia have published an article in Nature Geoscience exploring how the chemical properties of chalcopyrite can be used to achieve cleaner and more efficient copper extraction. Chalcopyrite is the world's primary source of copper, accounting for approximately 70%, but processing difficulties have long been a bottleneck.

Chalcopyrite has been known for over 300 years, yet its complex behavior resists low-temperature leaching and slows copper extraction from low-grade ores. Research lead Professor Joël Brugger stated, "Chalcopyrite is the world's dominant copper mineral, but its behavior is surprisingly complex, limiting our efficiency in extracting copper from it."

The study reveals that chalcopyrite's crystal structure is riddled with microscopic defects and trace elements such as silver, gold, and nickel. These subtle variations control the mineral's reactions during processing. The team found that trace amounts of silver can destabilize the mineral surface and trigger a cycle that more efficiently releases copper, significantly improving extraction.

Co-author Dr. Barbara Etschmann said, "By understanding how trace elements like silver interact with chalcopyrite at the atomic level, we can begin to design smarter, more targeted extraction methods. This means less energy, fewer chemicals, and better recovery rates from the same resources."

Chalcopyrite's atomic structure also underpins semiconductors used in solar cells and energy conversion devices, linking geology with clean technology. As global demand for copper surges to drive the energy transition, existing resources and processing methods are under pressure.

Professor Brugger emphasized, "Meeting future copper demand is not just about finding more deposits; it's about extracting what we already have more intelligently. Chalcopyrite sits at the heart of both this challenge and its solution." The study calls for interdisciplinary innovation to rethink how critical minerals are processed.

Publication details: Author: Silvia Dropulich, Monash University Faculty of Science; Title: Copper's 'gatekeeper' could unlock cleaner energy future; Published in: Nature Geoscience (2026); Journal Information: Nature Geoscience