[en] It is shown that a double-Gaussian-shaped probability distribution of moment directions is an adequate model of the spin structures in as-cast, stress-relieved and field-annealed samples of Fe₇₈B₁₃Si₉ at room temperature and in zero applied field. The distribution comprises the convolution of two independent Gaussian distributions, one in the ribbon plane, and the other normal to the ribbon plane. The double-Gaussian distribution is more physically realistic than some alternative models of the moment distribution in amorphous metals. (orig.)