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The phase and chemical composition of the sample of Campo del Cielo meteorite were studied by X-ray diffraction and X-ray fluorescence analysis. Troilite (FeS) was detected as sulfide inclusions in the sample. Structural parameters including fine structure parameters of troilite were investigated. It was found that dispersion makes the main contribution to the imperfection of the troilite crystal structure. [ABSTRACT FROM AUTHOR]

The morphology, texture and chemical composition of sulfide grains in the Chelyabinsk LL5, Northwest Africa 869 L4-6 and Gao-Guenie H5 ordinary chondrite fragments were studied by X-ray diffraction, optical microscopy, and scanning electron microscopy. A measurable amount of Cu was revealed in the sulfide phase of the Chelyabinsk LL5 meteorite as in the pentlandite inclusions within troilite, as in bulk chemical analysis of troilite. The difference in the morphology of sulfides in the meteorite fragments supposed to be due to differences in the conditions of their formation. [ABSTRACT FROM AUTHOR]