O-Pr, Pr-x polyhedra, Structural properties, Trigonal

• Al-O-Pr
• Al-Mg-Na-O-Pr
• Bi-Fe-O-Pr
• Al-O-Pr-Sr-Ti
• thermal and thermodynamic properties
• thermal expansion
• temperature dependence of cell parameter
• volume change at phase transition
• cell volume change at phase transition
• chalcogen
• lanthanoid
• rare earth
• oxide