Sulfide Minerals in Ordinary Chondrites Chelyabinsk, Northwest Africa 869 and Gao-Guenie

A comparative study of sulfide minerals in ordinary chondrites Chelyabinsk, Northwest Africa 869 and Gao-Guenie was carried out using X-ray diffraction, optical microscopy and scanning electron microscopy. Unit cell parameters were obtained for minerals: troilite, pyrrhotite, and pentlandite. A small amount of copper was revealed in LL chondrite Chelyabinsk, while its content in the metal and sulfide grains of H and L chondrites was below detection limit. Unit cell parameters for sulfides from the Chelyabinsk and Northwest Africa 869 chondrites were obtained.