The d value alone can be used to determine the magnitude of the wavevector, Q. Depending on the convention used, Q may be equal to 1/d or 2*pi/d. Usually d is expressed in angstrom units and Q in inverse angstrom units. To progress further from knowing Q to inferring the values of (h,k,l) one must know the crystal structure. The (h,k,l) indices represent vector components of the wavevector. For the simplest case of a cubic crystal with lattice constant a, using the convention that the reciprocal lattice constants a*=2*pi/a, the magnitude of Q will be given by the expression Q = (2*pi/a)*sqrt(h^2+k^2+l^2). Expressions for more general cases are given in many textbooks. Warren's book on x-ray diffraction is one classic resource. Good luck with your investigations.
Hi Ahmed, here is a sheet of my lecture regarding your question, but on RG are a lot of similiar questions, compare for instance:
https://www.researchgate.net/post/How_can_I_calculate_the_lattice_parameters_using_Rietveld_analysis
https://www.researchgate.net/post/How_do_you_find_the_miller_indices_parameters_hkl_for_an_XRD_of_ZnO
https://www.researchgate.net/post/How_to_calculate_lattice_constant_from_XRD_spectrum
https://www.researchgate.net/post/Can_anyone_explain_how_to_determine_the_lattice_constant_a_b_and_c_for_all_crystal_structures3
You may explore this link
https://www.instanano.com/2016/12/xrd-d-value-calculator1.html
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