Kemmler sack, Quaternary, Transitional

• Bi-Fe-O-Sr
• Fe-O-Pb-Sr
• Bi-Fe-Nb-O
• Bi-Fe-O-Pt
• Fe-O-W-Y
• structural properties
• magnetic properties
• electronic and electrical properties
• optical properties
• Moessbauer spectra
• transitional
• quaternary
• chalcogen
• oxide
• alkaline
• trigonal
• cubic
• tetragonal
• hexagonal
• orthorhombic