Alkali, Rare earth, Eu-K, Trigonal

• C-Eu-F-K-O
• Eu-K-O
• Ca-Eu-K-O-P
• B-Ba-Eu-K-O
• Eu-K-Mo-O
• thermal and thermodynamic properties
• electronic and electrical properties
• structural properties
• optical properties
• crystal electric field
• rare earth
• lanthanoid
• alkali
• chalcogen