24. The four index Miller–Bravais indices of the Miller plane (210) are:
(a) 21 30
ð
Þ or (21.0)
(b) 3 120
ð
Þ or 3 1:0
ð
Þ
(c) 1320
ð
Þ or 13:0
ð
Þ
(d) 31 20
ð
Þ or 31:0
ð
Þ
25. The four index Miller–Bravais indices of the Miller plane 113
ð
Þ are:
(a) 11 23
ð
Þ or (11.3)
(b) 1103
ð
Þ or 11:3
ð
Þ
(c) 1323
ð
Þ or 13:3
ð
Þ
(d) 31 23
ð
Þ or 31:3
ð
Þ
26. The four index Miller–Bravais indices of the direction [100] are:
(a) 11 20
½
Š
(b) 12 10
½
Š
(c) 2 1 10
½
Š
(d) 1 100
½
Š
27. The four index Miller–Bravais indices of the direction [010] are:
(a) 11 20
½
Š
(b) 1 100
½
Š
(c) 2 1 10
½
Š
(d) 12 10
½
Š
28. The four index Miller–Bravais indices of the direction [110] are:
(a) 11 20
½
Š
(b) 1 100
½
Š
(c) 2 1 10
½
Š
(d) 12 10
½
Š
29. In a cubic crystal system, the distance between the consecutive (111) plane is
2Å. Its lattice parameter is:
(a) 2.46Å
(b) 3.46Å
(c) 4.46Å
(d) 5.46Å
4.5 Zone and Zone Axis
173