X-ray diffraction pattern showed that in unit cell of fluorotrioxochroamte the ions arranged in a hexagonal closest packing with Z = 4. The cation and anion moieties are separated from each other and arranged in an alternative AB layering pattern. In the molybdenum and tungsten derivatives the powder diffractions data show the new prepared compounds. The crystalline forms are similar to those reported for NaMoO3F and CuNbO3F. NaMoO3F and CuNbO3F have been described as infinite zig-zag strings of edge-sharing M(O, F)6 (where M= Mo and Nb in NaMoO3F and CuNbO3F respectively) octahedral along the c-axis direction
