Kemmler sack, Oxide, Quaternary, Transitional

• Fe-O-Pb-Sr
• Fe-O-W-Y
• Bi-Fe-Nb-O
• Ba-Cu-O-Y
• Ba-Co-Ir-O
• structural properties
• magnetic properties
• electronic and electrical properties
• Moessbauer spectra
• conductivity or resistivity
• quaternary
• transitional
• chalcogen
• oxide
• alkaline
• trigonal
• cubic
• hexagonal
• tetragonal
• orthorhombic