GATE MT 2011 Q12. For a simple cubic unit cell with unit vectors i, j and k the angle between lattice vectors [100] and [111] in degrees is:

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Asked: March 14, 20202020-03-14T04:00:32+05:30 2020-03-14T04:00:32+05:30In: Physical Metallurgy & Heat treatment

23.08%(A) 35.2 ( 3 voters )

46.15%(B) 54.7 ( 6 voters )

7.69%(C) 60 ( 1 voter )

23.08%(D) 90 ( 3 voters )

Based On 13 Votes

GATE MT 2011 Q12. For a simple cubic unit cell with unit vectors i, j and k the angle between lattice vectors [100] and [111] in degrees is:

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Askmemetallurgy Official · Accepted Answer · 2020-11-15T22:02:32+05:30

Correct answer is option B. Angle between [100] and [111] is Cosθ = 1/(√1.√3) θ = cos-1 (1/√3) = 54.7

Correct answer is option B.

Angle between [100] and [111] is

Cosθ = 1/(√1.√3)

θ = cos^-1(1/√3) = 54.7