Editing Kamacite (section)

===Effect of shock===
[[Metallography|Metallographic]] and [[X-ray diffraction]] can be used on kamacite to determine the shock history of a meteorite. Using hardness to determine shock histories has been experimented with but was found to be too unreliable. Vickers hardness test was applied to a number of kamacite samples and shocked meteorites were found to have values of 160–170&nbsp;kg/mm and non-shocked meteorites can have values as high as 244&nbsp;kg/mm.<ref name="Jain Gordon Lipschutz" /> Shock causes a unique iron transformation structure that is able to be measured using metallographic and X-ray diffraction techniques. After using metallographic and X-ray diffraction techniques to determine shock history it was found that 49% of meteorites found on Earth contain evidence of shock.