inorganic compounds
The title compounds, sodium titanyl phosphate and potassium titanyl phosphate, are isostructural, belonging to a family of compounds with interesting non-linear optical properties. The effect of substitution of K by Na has been analysed by X-ray diffraction at 110 K. The substitution does not modify the geometry of the phosphate groups; however, the Ti-O coordination distances are changed, as well as the relative orientation of the Ti and P polyhedra.