The 3d-electrons angular anisotropy parameter of the free Mn⁺ ion is calculated using the 'spin-polarized' random phase approximation with exchange. Strong resonance structure is discovered, which is due to interference with powerful 3p to 3d discrete excitation. The effect of the 3p to 4s transition is also noticeable. The ordering of these respective resonances with phonon energy increase proved to be opposite in angular anisotropy parameter to that in 3d photoionization cross section.