Answer:
The difference in the magnetic orientation influences the thermal stability of the allotropes of iron.
Explanation:
It is known that the allotropes of iron exist in three phases: α - phase, β- phase, and γ-phase. However, two prominent structures are the α - phase and γ-phase. Now, let us look at the two phrases:
α - phase
This structure is a body-centered cube. It means that the unit cell structure resembles a cube. The lattice points are in the face of the cube. This subsequently affects the magnetic structure of the iron allotrope.
γ-phase
This allotrope has a lattice structure. It simply means that the structure has lattice points on the face of the cube. The structure generally affects the magnetic properties of the transitional metal; hence the stability of the γ-phase compared to α-phase.
The stability of the allotropes of the atom at high temperatures had been accounted for by the lattice structure. The gamma iron with FCC allotrope structure is more stable than the BCC alpha allotrope.
The lattice structure is given as the arrangement of the atoms for stability.
The alpha iron has BCC i.e. Body-Centered Cubic structure, the atoms are present at the lattice points and contribute to the stability of the atom.
The gamma iron at high temperature has the presence of stacking of one more iron atom in the structure. The extra atom is present in the face of the cube and contributes to the Face Centered Cubic structure.
The lattice arrangement adds to the extra space for the arrangement of the carbon atom, adding to the stability of the allotrope.
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