The Chandrayaan-I X-ray Spectrometer (CIXS) orbiting the moon has send data which indicates the presence of Magnesium, Aluminium and Silicon.
The X-rays are absorbed by the atoms in the lunar soil and are remitted in a way which reveals the make-up of the surface.
Spectrometer is sensitive to magnesium, aluminium and silicon X-rays. It may also make measurements of elements like iron, titanium and calcium when solar illumination is bright.
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