Stacking Faults in HCP (Hexagonal Closed Pack) Crystals

In this video we will discuss 'Stacking Faults in HCP (Hexagonal Closed Pack) Crystals'.
Erratum:
I made a mistake in locating the fault plane in I1 at @2:32. The fault plane here is actually the atomic plane B next to the red line I have drawn. This plane B is actually part of the crystals on either side of the fault plane. In fact this fact distinguishes I1 from I2. I1 has an atomic plane as its fault plane whereas I2 does not.

[@rajeshprasadlectures]

Erratum: I made a mistake in locating the fault plane in I1 2:32. The fault plane here is actually the atomic plane B next to the red line I have drawn. This plane B is actually part of the crystals on either side of the fault plane. In fact, this fact distinguishes I1 from I2. I1 has an atomic plane as its fault plane whereas I2 does not.