  In this paper we consider gauged N=2 supergravities which arise in the
low-energy limit of type II string theories and study examples which exhibit
spontaneous partial supersymmetry breaking. For the quantum STU model we derive
the scalar field space and the scalar potential of the N=1 supersymmetric
low-energy effective action. We also study the properties of the Minkowskian
N=1 supersymmetricground states for a broader class of supergravities including
the quantum STU model.
