Follow this link to skip to the main content NASA Jet Propulsion Laboratory California Institute of Technology JPL HOME EARTH SOLAR SYSTEM STARS & GALAXIES SCIENCE & TECHNOLOGY BRING THE UNIVERSE TO YOU JPL Email News RSS Mobile Video
JPL Banner
Mars Science Laboratory

Chemistry & Mineralogy X-Ray Diffraction

The Chemistry & Mineralogy X-Ray Diffraction (CheMin) instrument represents a major advancement in identifying martian minerals. After the rover prepares a rock sample, CheMin directs a beam of X-rays as fine as a human hair through the powdered material. Because all minerals diffract X-rays in a characteristic pattern and all elements emit X-rays with a unique set of energy levels, scientists use the information from X-ray diffraction to identify the crystalline structure of materials the rover encounters on Mars.

These analyses assist in the assessment of water history and the search for possible signatures of life. The instrument can identify and quantify all minerals in complex natural samples (including basalts) and soils.