SEARCH Articles Figures Tables Concerted Phenomenon Coupled with Spin Equilibrium and Valence Fluctuation Finite valence fluctuations Fluctuating valence compounds Fluctuating valence state Interconfiguration fluctuation valence K.H. Fischer, Valence-fluctuation and heavy-fermion 4f systems Mossbauer spectroscopy valence fluctuation Valence fluctuation Valence fluctuation Valence fluctuation phenomena Valence fluctuations compounds Valence-fluctuation regime