Cementite Fe₃C, Pnma #62 (oP16), a = 5.0910 Å, b = 6.7483 Å, c = 4.5241 Å. Fractional coordinates from the neutron-diffraction refinement of Wood et al., J. Appl. Cryst. 37, 82 (2004) at 300 K: Fe1 8d (0.1846, 0.0594, 0.3340), Fe2 4c (0.0346, ¼, 0.8377), C 4c (0.8984, ¼, 0.4467). Validated: density 7.67 g/cm³, C in 6-fold trigonal prism (C–Fe 1.90–2.11 Å).
Cementite (Fe₃C, measured Pnma) CIF · Files on Ouro
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Structure sanity card for a CIF
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Crystal-Likeness Score (synthesizability) from CIF