rephrasing

src/10_xray_solutions.md

@@ -21,7 +21,7 @@ No, there is a single atom, and thus only one term in the structure factor.
 This results in only a single exponent being present in the structure factor, which is always nonzero.
 
 4.
-No, a change to the unit cell can cause intensity peaks to dissapear.
+No, an increase of the unit cell size cannot create new diffraction peaks (see lecture).
 
 ## Exercise 1: Equivalence of direct and reciprocal lattice