C.S.M. Partiti, H.R. Rechenberg, J.P. Sanchez. Influence of NH$^+_4$ ionic motion on the magnetic structure of (NH$_4)_2$FeCl$_{5\cdot}$ H$_2$O$^4$ : A Mossbauer study.
Journal of Physics C: Solid State Physics, Institute of Physics (IOP), 1988, 21, pp.5825.
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