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There are four miller indices (hklj) for the hexagonal lattice, the third being redudant:
l=-(h+k) (1)
Given the basis vectors a1,a2,a3 I can certainly see that:
a3=-(a1+a2)
But how does this immidiatly lead me to the relation (1) between the miller indices?
l=-(h+k) (1)
Given the basis vectors a1,a2,a3 I can certainly see that:
a3=-(a1+a2)
But how does this immidiatly lead me to the relation (1) between the miller indices?