Structural properties of mixtures of charged colloidal particles are studied by solving the Ornstein-Zernike equation together with the Rogers-Young closure relation. The partial radial distribution functions g ij ( r) are found to agree very well with results obtained from molecular dynamics simulations. From g ij ( r) partial structure factors S ij ( k) are determined. They are used to obtain results for the experimentally accessible structure factor S M( k) and for the Bhatia-Thornton structure factors S NN( k), S CC( k) and S CC( k). The latter describe concentration ordering, charge ordering and their coupling. A systematic study of these quantities is presented as a function of relative composition of the two components. It is found that various features of S M( k), such as position and height of the main peak and its value at k = 0, change non-monotonously as a function of composition.