title: Alternative transformation behavior in sulfides: direct observations by transmission electron microscopy.
abstract: Structural phase transformations in Ni(7)S(6) and Cu(7)S(4) have been observed dynamically by in situ experiments in a transmission electron microscope. In this way it is possible to demonstrate the possibility of two fundamentally different types of behavior: (i) the ideal transformation from the stable high-temperature form to the stable low-temperature form and vice versa and (ii) alternative metastable processes which operate when the formation of the low-temperature state is impeded.
authors.forename: A
authors.initials: A
authors.lastname: Putnis