- Preparation, structure and properties of low valent oxides and fluorides
- Low valent fluorides of the rare earth elements
- Low valent oxides of Ti, Nb and Ta
- Main group element clusters containing interstitial transition metals in low valent oxides and fluorides
- Titanates of divalent Eu and Sm: possible candidates for multiferroic materials
- Transition metal anions in polar intermetallic phases
- Electronic structures of solids
- Structure systematics on the basis of connected polyhedra