New Magnetic Mineral Found in Lunar Samples Offers Clues to Moon's Ancient Magnetism

Researchers have identified a previously unknown magnetic mineral, γ‑Fe, in lunar samples returned by China’s Chang’e‑6 mission. The mineral was detected in tiny iron particles embedded in impact glasses collected from the Moon’s surface. Laboratory analysis shows that γ‑Fe can preserve stable magnetic signals over geological time, suggesting it could act as a natural recorder of the Moon’s magnetic field. Because the Moon’s ancient magnetic environment has long been lost, the discovery provides a new tool for scientists to reconstruct the history of lunar magnetism and its evolution. The finding also highlights the value of Chang’e‑6’s sample return for advancing planetary science.