Chem: x-ray

Experiment to obtain the X-ray diffraction peaks of an unknown metal.
Radiation is K_alpha from Cu.
Through these diffraction peaks you wanted to determine:
(a) whether the cell is SC, BCC, or FCC
(b) the (hkl) value of the peaks
(c) the lattice parameter a of the metal

sin^2(theta)
0.120
0.239
0.480
0.600
0.721
0.841
0.956

--------------------------------
a) I think this is SC
c) a = 2.4 A

what about b) ?

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