Why Is Crystal Structure Isotropic Although Unit Cells Are Anisotropic?

Crystal structure is isotropic although unit cells are anisotropic because the physical and mechanical properties of these single structures differ with orientation. When these properties of a material vary with the crystallographic orientation, the material is said to be anisotropic. When the properties of a material are same in all the orientation, the material is said to be isotropic. This is the reason why crystal structure is isotropic and unit cell is anisotropic. The crystal structure is isotropic although unit cells are anisotropic because the physical and mechanical properties of these single structures differ with orientation. When these properties of a material vary with the crystallographic orientation, the material is said to be anisotropic. When the properties of a material are the same in all the orientation, the material is said to be isotropic. This is the reason why the crystal structure is isotropic and the unit cell is anisotropic.

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