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What is the crystal structure of cementite?(a) Orthogonal(b) Pyramidal(c) Trapeziodal(d) OrthorhombicI got this question in an international level competition.I'm obligated to ask this question of Transformation in Steel topic in portion Heat treatment of Metals and Alloys of Casting-Forming-Welding II

Answer»

Right choice is (d) Orthorhombic

Best explanation: The CRYSTAL STRUCTURE of the compound CEMENTITE or iron CARBIDE is not orthogonal or PYRAMIDAL or trapezoidal, but it is orthorhombic.



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