A structural phase transition is always accompanied by a change in the symmetry of the crystal lattice. Assuming that the initial structure was a simple cubic lattice, and during the structural transition the angle between the edges of the square at the base of the lattice changes by q = 3° and it becomes a rhombus, determine how the spectrum of neutrons scattered on such a structure will qualitatively change (from the diagonals). What must be the relative angular resolution of the detector |Dq/q| to detect grating distortion?

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