Diffraction from an unknown cubic metal is observed to occur at the following value of θ when using CuKα radiation. Determine the (a) crystal structure and (b) the atomic radius.

Question

20.1o   29.2o   36.6o   43.5o   50.2o   57.4o   65.5o

a. Crystal structure:
SCFCCBCC

b. Lattice constant (Enter response in Å):

Answer 1

a. BCC
b. 3.17

I don't have c yet!

Answer 2

1.37