Transparent single crystals of KSrVO4 were grown at 1500 degrees C by the direct melt and slow cooling technique. X-ray crystallography has shown that this compound crystallizes in the orthorhombic system with the space group P2(1)2(1)2(1) (No. 9). The lattice parameters are a = 5.865, b = 7.491, c = 10.021 Angstrom, and Z = 4. The structure is isotypical with beta-K2SO4, hut with a different space group. It can be regarded as made of independent [VO4](3-) tetrahedra arranged in such way as to delimit large cavities where Sr2+ and K+ are located in eight- and ninefold coordination spheres, respectively. The mean interatomic distances K-O, Sr-O, and V-O are equal to 2.952, 2.645, and 1.720 Angstrom, respectively.