a) A monochromatic x-ray beam gives diffraction of a 18 °C
degree cubic crystal at an angle of 2θ = 150.8 °. When the same
experiment is repeated at a temperature of 318 degrees, the
diffraction angle is 141.6 °. What is the linear expansion
coefficient of this crystal? Calculate.
b) Find the lattice vectors and the angles between the lattice
vectors of conventional and primitive unit cells for surface
centered cubic (FCC) lattice. Find the volume of the unit cells and
obtain the ratio of the volume of the conventional cell to the
volume of the primitive cell. Find out if your result is
correct.
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