Let A ⊂ S 2 be a "well-spread" sample of k points on the boundary of the sphere of radius ∥a ⋆ ∥ using the Fibonacci lattice spiral . The set A contains candidates for the crystal lattice basis vector a * . We want to define a score for the vectors of A that ranks higher those vectors where the Laue condition is "closer" to being satisfied. To this end, for a fixed hyperparameter δ, let