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If we plot φ (angle between the crystal plane and closed packed plane) vs E (total surface energy), all the low index planes should be located at________

If we plot φ (angle between the crystal plane and closed packed plane) vs E (total surface energy), all the low index planes should be located at________ Correct Answer Low energy cusps

It should be noted that the close-packed orientation (φ = 0) lies at a cusped minimum in the energy plot. Similar arguments can be applied to any crystal structure for rotations about any axis from any reasonably close-packed plane. All low-index planes should therefore be located at low-energy cusps.

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