crystal lattice of a material

Question

What is the crystal lattice of a material having the CFC crystal structure with a unit cell consisting of copper (Cu) and silver (Ag) atoms?

how the choice of atoms that make up the crystalline structure can have a significant impact on the electronic properties of the material.?

Answer 1

OK, Jessie T.,

You're going to have to do some calculating here, for sure. You need: the atomic radii of Cu and Ag respectively; a diagram of CFC structure so you can see how the atoms fit geometrically; and possibly some additional info -- if the Ag can only fit into some positions, how do you know that your alloy is in the proper proportions to achieve a perfect CFC lattice long-range?

I suspect the question is aimed at 1) allowing you to glimpse a bit of alloy composition design (do certain atoms need to be touching to pass electrons easily), and after that 2) specifics of conduction band energies in mixed-composition materials. You can look up conduction bands for pure Cu and Ag -- do they overlap?