# Crystallography, diffraction, identifying the pure element

1. Homework Statement
The only things you know about the sample are: (i) it has some kind of cubic lattice, and (ii) it is a pure element. Identify the element in the crystalline sample.
SC: R = 0.5a
FCC: R = 0.25a√2
BCC: R = 0.25a√3

Distances from Bragg peaks:
d1 = 0.2037 nm
d2 = 0.1746 nm
d3 = 0.1244 nm

2. Homework Equations
n λ = 2dhklsin θ

d = a/√(h2+k2+l2)

3. The Attempt at a Solution
Assuming the above is correct, I'm stuck.
I think I need a table or something of each element.

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