  The BaFe2(As1-xPx)2 compounds with x = 0 (parent), x = 0.10 (under-doped), x
= 0.31, 0.33, 0.53 (superconductors with Tc = 27.3 K, 27.6 K, 13.9 K,
respectively) and x = 0.70, 0.77 (over-doped) have been investigated versus
temperature using 57Fe M\"ossbauer spectroscopy. Special attention was paid to
regions of the spin-density-wave (SDW) antiferromagnetic order, spin-nematic
phase, and superconducting transition. The BaFe2(As0.90P0.10)2 compound
exhibits a reduced amplitude of SDW as compared to the parent compound and
preserved universality class of two-dimensional magnetic planes with
one-dimensional spins. The spin-nematic phase region for x = 0.10 is
characterized by an incoherent magnetic order. BaFe2(As0.69P0.31)2 shows
coexistence of a weak magnetic order and superconductivity due to the vicinity
of the quantum critical point. The charge density modulations in the
BaFe2(As0.67P0.33)2 and BaFe2(As0.47P0.53)2 superconductors are perturbed near
Tc. Pronounced hump of the average quadrupole splitting across superconducting
transition is observed for the system with x = 0.33. The phosphorus
substitution increases the Debye temperature of the BaFe2(As1-xPx)2 compound.
Moreover, experimental electron charge densities at Fe nuclei in this material
conclusively show that it should be recognized as a hole-doped system. The
measured M\"ossbauer spectral shift and spectral area are not affected by
transition to the superconducting state. This indicates that neither the
average electron density at Fe nuclei nor the dynamical properties of the
Fe-sublattice in BaFe2(As1-xPx)2 are sensitive to the superconducting
transition. Theoretical calculations of hyperfine parameters determining the
patterns of M\"ossbauer spectra of BaFe2(As1-xPx)2 with x = 0, 0.31, 0.5, and
1.0 are performed within the framework of the density functional theory.
