title: Aluminium oxide (data page)
text: # Aluminium oxide (data page)
  
  This page provides supplementary chemical data on aluminium oxide.
  
  ## Material Safety Data Sheet
  
  * SIRI
  * Science Stuff
  
  ## Structure and properties
  
  Structure and properties :
  
  | Dielectric constant, $ε_{11}=ε_{22}$ | 9.34 $ε_0$ at 25 °C |
  | - | - |
  | Dielectric constant, $ε_{33}$ | 11.54 $ε_0$ at 25 °C |
  | Bond strength | ? |
  | Bond length | ? |
  | Bond angle | ? |
  | Magnetic susceptibility | ? |
  
  Table of Refractive index :
  
  | Wavelength(µm) | $n_o$ | $n_e$ |
  | - | - | - |
  | 0.193 | 1.92879 | 1.91743 |
  | 0.213 | 1.88903 | 1.87839 |
  | 0.222 | 1.8754 | 1.86504 |
  | 0.226 | 1.87017 | 1.85991 |
  | 0.244 | 1.85059 | 1.84075 |
  | 0.248 | 1.84696 | 1.83719 |
  | 0.257 | 1.83932 | 1.82972 |
  | 0.266 | 1.83304 | 1.82358 |
  | 0.280 | 1.82437 | 1.81509 |
  | 0.308 | 1.81096 | 1.80198 |
  | 0.325 | 1.80467 | 1.79582 |
  | 0.337 | 1.80082 | 1.79206 |
  | 0.351 | 1.79693 | 1.78825 |
  | 0.355 | 1.79598 | 1.78732 |
  | 0.442 | 1.78038 | 1.77206 |
  | 0.458 | 1.77843 | 1.77015 |
  | 0.488 | 1.7753 | 1.76711 |
  | 0.515 | 1.77304 | 1.76486 |
  | 0.532 | 1.7717 | 1.76355 |
  | 0.590 | 1.76804 | 1.75996 |
  | 0.633 | 1.7659 | 1.75787 |
  | 0.670 | 1.76433 | 1.75632 |
  | 0.694 | 1.76341 | 1.75542 |
  | 0.755 | 1.76141 | 1.75346 |
  | 0.780 | 1.76068 | 1.75274 |
  | 0.800 | 1.76013 | 1.7522 |
  | 0.820 | 1.75961 | 1.75168 |
  | 0.980 | 1.75607 | 1.74819 |
  | 1.064 | 1.75449 | 1.74663 |
  | 1.320 | 1.75009 | 1.74227 |
  | 1.550 | 1.74618 | 1.73838 |
  | 2.010 | 1.73748 | 1.72973 |
  | 2.24929 | 1.73232 | 1.72432 |
  | 2.703 | 1.719 | 1.711 |
  | 2.941 | 1.712 | 1.704 |
  | 3.333 | 1.701 | 1.693 |
  | 3.704 | 1.687 | 1.679 |
  | 4.000 | 1.674 | 1.666 |
  | 4.348 | 1.658 | 1.65 |
  | 4.762 | 1.636 | 1.628 |
  | 5.000 | 1.623 | 1.615 |
  | 5.263 | 1.607 | 1.599 |
  
  Table of Coefficients of Sellmeier equation :
  
  | Coefficient | for ordinary wave | for extraordinary wave |
  | - | - | - |
  | $B_1$ | 1.43134930 | 1.5039759 |
  | $B_2$ | $6.5054713x10^{−1}$ | $5.5069141x10^{−1}$ |
  | $B_3$ | 5.3414021 | 6.5937379 |
  | $C_1$ | $5.2799261^{−3}µm^2$ | $5.48041129^{−3}µm^2$ |
  | $C_2$ | $1.42382647^{−2}µm^2$ | $1.47994281^{−2}µm^2$ |
  | $C_3$ | $3.25017834^2µm^2$ | $4.0289514^2µm^2$ |
  
  ## Thermodynamic properties
  
  Phase behavior :
  
  | Triple point | ? K (? °C), ? Pa |
  | - | - |
  | Critical point | ? K (? °C), ? Pa |
  | Std enthalpy change of fusion, $Δ_{fus}H^o$ | ? kJ/mol |
  | Std entropy change of fusion, $Δ_{fus}S^o$ | ? J/(mol·K) |
  | Std enthalpy change of vaporization, $Δ_{vap}H^o$ | ? kJ/mol |
  | Std entropy change of vaporization, $Δ_{vap}S^o$ | ? J/(mol·K) |
  | Solid properties ||
  | Std enthalpy change of formation, $Δ_fH^o_{solid}$ | -1675.7 kJ/mol |
  | Standard molar entropy, $S^o_{solid}$ | 50.92 J/(mol K) |
  | Heat capacity, $c_p$ | 89.7248 J/(mol K) |
  | Liquid properties ||
  | Std enthalpy change of formation, $Δ_fH^o_{liquid}$ | -1620.57 kJ/mol |
  | Standard molar entropy, $S^o_{liquid}$ | 67.24 J/(mol K) |
  | Heat capacity, $c_p$ | 192.5 J/(mol K) |
  | Gas properties ||
  | Std enthalpy change of formation, $Δ_fH^o_{gas}$ | ? kJ/mol |
  | Standard molar entropy, $S^o_{gas}$ | ? J/(mol K) |
  | Heat capacity, $c_p$ | ? J/(mol K) |
  
  ## Spectral data
  
  UV-Vis :
  
  | $λ_{max}$ | ? nm |
  | - | - |
  | Extinction coefficient, ε | ? |
  | IR ||
  | Major absorption bands | ? $cm^{−1}$ |
  | NMR ||
  | Proton NMR | |
  | Carbon-13 NMR | |
  | Other NMR data | |
  | MS ||
  | Masses of main fragments | |
  