Powder diffraction data and Rietveld refinement of Hagg-carbide, x-Fe_5C_2

摘要

The structure and powder diffraction data of Hagg-carbide (X-Fe_5C_2) have been redetermined and improved by X-ray diffraction. Experimental values of 2θ, corrected for systematic errors, relative peak intensities, lattice spacings, and the Miller indices of 27 observed reflections up to 100deg. 100~0 2θ are reported. Th unit cell is monoclinic (space group c2/c, z=4) with a=11.588 A, b=4.579 A, c=5.059 A, and β-97.75~0.