In addition to the well-known alpha and beta modifications, nickel hydroxid
e is shown to exist in a number of poorly crystalline forms-clearly disting
uishable by their signature X-ray powder diffraction patterns. DIFFaX simul
ations combined with compositional analysis and IR spectral data indicate t
hat these are interstratified phases consisting of alpha- and beta-type str
uctural motifs intermixed in varying proportions.