P4/nmm, Rare earth, Transitional

• As-Fe-La-O
• As-F-Fe-La-O
• As-F-Fe-O-Sm
• As-Ce-F-Fe-O
• As-Fe-O-Sm
• magnetic properties
• structural properties
• electronic and electrical properties
• conductivity or resistivity
• magnetic susceptibility
• transitional
• rare earth
• lanthanoid
• metalloid
• non-disordered
• tetragonal
• orthorhombic
• hexagonal
• monoclinic