As-O, Metalloid, Pnictogen, Phase transitions

• As-Fe-La-O
• As-H-K-O
• As-Fe-O-Sm
• As-Fe-Nd-O
• As-Ce-Fe-O
• temperature for congruent melting
• fusion
• structural transitions
• temperature for structural transition
• pnictogen
• chalcogen
• metalloid
• transitional
• monoclinic
• tetragonal
• orthorhombic
• triclinic
• trigonal