Bi-Fe-Nb-O, Chalcogen, Oxide, Quaternary, Transitional, Kemmler sack

• P1103517-6
• P1103517-9
• P1103517-8
• P1103517-7
• P1103517-1
• P1103517-2
• P1103517-3
• P1103517-4
• P1103517-5
• P1103517-10