Apatite, Lanthanoid, Rare earth, Electrical conductivity

• La-O-Si
• Ge-La-O
• La-O-Si-Sr
• Al-Nd-O-Si
• Nd-O-Si
• rare earth
• apatite
• chalcogen
• lanthanoid
• disordered
• hexagonal
• trigonal
• triclinic
• monoclinic