Al-O, Corundum, Oxide, Hexagonal

• C406605-5
• C1400206-3
• C403997-3
• C404045-2
• C207150-2
• C209002-2
• C209129-4
• C209237-3
• C211193-5
• C216123-4
• C217116-3
• C217126-5
• C219168-3
• C219210-2
• C219211-2