# Chang’e-6 lunar sample analysis

> Live situation record from CLSTR: https://clstr.news/situations/change-6-lunar-sample-analysis
> Updated: 2026-10-18T12:01:34.000Z. Sources: 7. Developments: 2.

Analysis of soil samples returned by China’s Chang’e-6 mission has revealed the presence of gamma iron (γ-Fe) in natural lunar material. This discovery is significant because gamma iron typically only exists at high temperatures and usually transforms into alpha iron upon cooling.

Researchers hypothesize that the iron was preserved through extreme temperature spikes, such as meteorite impacts, followed by rapid cooling that “froze” the iron in its high-temperature state. The presence of small amounts of carbon may have also helped stabilize the structure. 

These findings, published in the Proceedings of the National Academy of Sciences, provide new insights into the Moon’s ancient magnetic history. Some larger gamma iron particles exhibit stable magnetic vortex states, acting as ‘magnetic fossils’ that may help scientists understand how the Moon’s magnetic field functioned in the past.

## Timeline

### 2026-10-18: China discovers gamma iron in lunar samples from Chang’e 6 mission

China’s Chang’e 6 mission has discovered gamma iron in lunar samples from the Moon’s far side, suggesting past high-temperature events like meteorite impacts.

2 sources. https://clstr.news/cluster/china-discovers-gamma-iron-in-lunar-samples-from-change-6-mission

### 2026-09-29: Chang’e-6 samples reveal unique gamma iron on the Moon

Scientists have identified gamma iron in Chang’e-6 lunar samples, providing new evidence of the Moon's ancient magnetic history and past volcanic activity.

5 sources. https://clstr.news/cluster/change-6-samples-reveal-unique-gamma-iron-on-the-moon

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Cite as: Chang’e-6 lunar sample analysis. CLSTR, https://clstr.news/situations/change-6-lunar-sample-analysis