[en] The hypothesis that there exists a nonet of scalars mainly composed of a valence quark-antiquark pair and mixed according to near singlet-octet separation: f₀(980) singlet, a₀^+,0,- (980) , K₀*^+,0(1430), K-bar₀*^-,0 (1430) f₀(1500) octet, is put to further tests from the three body decays D^±, D_s^± → PS^± = π⁺, ^- with PS^± π^± , K^±. The analysis of decay phases supports the singlet nature of f₀(980)