Question

A certain metal has an atomic mass of 60 amu, an atomic radius of 0.115 nm, and a BCC crystal structure. Below, the rectangle at right corresponds to the shaded plane in the unit cell at left. In the space below, please indicate (showing your work as appropriate) 1. The indices of the shaded plane (choose from 100,010, 110, 111) 2. The dimensions of the plane: nm high x nm wide 3. Which of the 4 sketches (A,B,C or D) is the best representation of this plane. b) ? nm b) ? nm

Answer 1

1. (110)

2. 0.376 nm X 0.266 nm.

3. C

- Here the shaded plane touches y-aris at a, x-anis at 1 z akis at ose it doesn't touch the tanis. when we consider (600) as omgin with respect to this coordinate system. Intercepts are to millen indices 1,10 will lee (110). 2. Here given reading 20. 115 mm 3ba is leady diagonal of Bee 4x0.115 70-460 mm - 10 m a 2 (0.460/6 Jam 20.266mm (loreadth) one demension will lee 0.266 om & anothers (rength) will see 0.376 nm So, 0.3 Form X 0.266 mm 3. c will see the figure..