As-Fe-Sr, As-x polyhedra, Phase transitions, Pnictogen

• As-F-Fe-Sr
• As-Ca-Fe-Sr
• As-Fe-Na-Sr
• As-Fe-Ru-Sr
• structural transitions
• temperature for structural transition
• temperature for congruent melting
• fusion
• transitional
• metalloid
• alkaline
• pnictogen
• metal
• tetragonal
• orthorhombic
• monoclinic
• trigonal