The distortion undergone by BaF2: Mn2+below 50 K is examined here through the analysis of the experimental isotropic (As) and anisotropic (Ap) superhyperfne constants. This quantitative analysis support that the “short” Mn2+-F−distance experiences a decrement of 8(4) pm with respect to the distance R= 232(2) existing in the OhMnF86-complex in BaF2at room temperature. By contrast the “long” Mn2+-F−distance becomes 250(3) pm.