Aluminum oxide, single crystal

• CAS: 1344-28-1
• Catalog Number: ACM1344281-8
• Category: Single Crystal Substrates
• Molecular Weight: 101.961g/mol
• Molecular Formula: Al2O3;Al2O3;Al2O3
• Description: Aluminum oxide is a white odorless crystalline powder. Water insoluble. Properties (both physical and chemical) vary according to the method of preparation; different methods give different crystalline modifications. The variety formed at very high temperature is quite inert chemically.;DryPowder; DryPowder, OtherSolid; DryPowder, PelletsLargeCrystals; DryPowder, WetSolid; Liquid; OtherSolid; PelletsLargeCrystals; PelletsLargeCrystals, OtherSolid; WetSolid; WetSolid, Liquid;WHITE POWDER.;White, odorless, crystalline powder.;White, odorless, crystalline powder.
• IUPAC Name: dialuminum;oxygen(2-)
• Canonical SMILES: [O-2].[O-2].[O-2].[Al+3].[Al+3]
• InChI: InChI=1S/2Al.3O/q2*+3;3*-2
• InChI Key: PNEYBMLMFCGWSK-UHFFFAOYSA-N
• Boiling Point: 5396 °F at 760 mm Hg (NIOSH, 2016);2977 °C;3000 °C;5396°F;5396°F
• Melting Point: 3632 °F (NIOSH, 2016);2030 °C;2054 °C;3632°F;3632°F
• Density: 4 (NIOSH, 2016);Density: 3.4-4.0;3.97 g/cm³;4;4.0
• Solubility: Insoluble (NIOSH, 2016);Difficult solubility in mineral acids and strong alkali;Insoluble in water;Solubility in water: none;Insoluble
• Color/Form: White crystalline powder;White powder, balls or lumps or various mesh
• Complexity: 0
• Covalently-Bonded Unit Count: 5
• Diameter: 8-10 nm
• EC Number: 215-691-6
• Exact Mass: 101.947821g/mol
• Formal Charge: 0
• H-Bond Acceptor: 3
• H-Bond Donor: 0
• Heavy Atom Count: 5
• ICSC Number: 0351
• Monoisotopic Mass: 101.947821g/mol
• Odor: Odorless
• Other Experimental: Very hygroscopic; an electrical insulator, electrical resistivity at 300 °C about 1.2x10+13 ohms-cm; very hard, about 8.8 on Mohs' scale; when heated above 800 °C, becomes insoluble in acid; specific gravity increases from 2.8 to 4.0 when heated above 800 °C;White powder, hexagonal; MP: 2054 °C; BP: 2977 °C; density: 3.99 g/cu cm; insoluble in water, organic solvents; slightly soluble in alkaline solutions /Alpha-alumina/;Soft white powder; transforms to corundum at 1200 °C; density: 3.97 g/cu cm; insoluble in water; soluble in acid; slightly soluble in alkaline solutions /Gamma-alumina/;Heat of formation: -130.0 kJ/mol; Gibbs energy of formation: -159.0 kJ/mol; molar entropy: 259.4 J/mol-K; molar heat capacity at constant pressure: 45.7 J/mol-K at 298.15 K;Vapor pressures: 100 Pa at 2122 °C; 1 kPa at 2351 °C; 10 kPa at 2629 °C; 100 kPa at 2975 °C;Enthalpy of fusion: 111.1 kJ/mol /Alpha-alumina/;Index of refraction: 1.7598 /alpha-alumina/; 1.7598 /gamma-alumina/;Density: 3.97 g/cu cm; Mohs' hardness: 9; index of refraction: 1.761 (alpha), 1.769 (beta) /Corundum/;Ridgeway's hardness scale: 12; Knoop hardness: 21 kN/sq m;Mean specific heat: 795.5 J/kg-K from 25-1,800 °C; thermal conductivity: 10.9 W/m-K at 500 °C, 6.2 W/m-K at 1000 °C; linear thermal expansion coefficient: 8.6/deg C X 10+6, from 20-1000 °C
• Refractive Index: Index of refraction: 1.768, 1.760
• Rotatable Bond Count: 0
• RTECS Number: BD1200000
• UNII: LMI26O6933
• Vapor Pressure: 0 mm Hg (approx) (NIOSH, 2016);1 mm Hg at 2158 °C;0 mmHg (approx);0 mmHg (approx)