Aluminium oxide

  • aluminium oxide
    (aluminum oxide)
    corundum-3d-balls.png
    aluminium oxide2.jpg
    identifiers
    cas number
    • 1344-28-1 ☑y
    3d model (jsmol)
    • interactive image
    • interactive image
    chembl
    • chembl3707210
    chemspider
    • 8164808 ☑y
    drugbank
    • db11342
    echa infocard 100.014.265
    ec number
    • 215-691-6
    pubchem cid
    • 9989226
    rtecs number
    • bd120000
    unii
    • lmi26o6933 ☑y
    comptox dashboard (epa)
    • dtxsid1052791
    properties
    chemical formula
    al2o3
    molar mass 101.960 g·mol−1
    appearance white solid
    odor odorless
    density 3.987g/cm3
    melting point 2,072 °c (3,762 °f; 2,345 k)[3]
    boiling point 2,977 °c (5,391 °f; 3,250 k)[4]
    solubility in water
    insoluble
    solubility insoluble in diethyl ether
    practically insoluble in ethanol
    log p 0.31860[1]
    magnetic susceptibility (χ)
    −37.0×10−6 cm3/mol
    thermal conductivity 30 w·m−1·k−1[2]
    refractive index (nd)
    nω=1.768–1.772
    nε=1.760–1.763
    birefringence 0.008
    structure
    crystal structure
    trigonal, hr30, space group = r3c, no. 167
    lattice constant
    a = 478.5 pm, c = 1299.1 pm
    coordination geometry
    octahedral
    thermochemistry
    std molar
    entropy
    (so298)
    50.92 j·mol−1·k−1[5]
    std enthalpy of
    formation
    fh298)
    −1675.7 kj/mol[5]
    pharmacology
    atc code
    who)
    hazards
    safety data sheet see: data page
    ghs pictograms ghs07: harmful
    nfpa 704 (fire diamond)
    nfpa 704 four-colored diamond
    0
    0
    0
    flash point non-flammable
    niosh (us health exposure limits):
    pel (permissible)
    osha 15 mg/m3 (total dust)
    osha 5 mg/m3 (respirable fraction)
    acgih/tlv 10 mg/m3
    rel (recommended)
    none[6]
    idlh (immediate danger)
    n.d.[6]
    related compounds
    other anions
    aluminium hydroxide
    aluminium sulfide
    aluminium selenide
    other cations
    boron trioxide
    gallium oxide
    indium oxide
    thallium oxide
    supplementary data page
    structure and
    properties
    refractive index (n),
    dielectric constantr), etc.
    thermodynamic
    data
    phase behaviour
    solid–liquid–gas
    spectral data
    uv, ir, nmr, ms
    except where otherwise noted, data are given for materials in their standard state (at 25 °c [77 °f], 100 kpa).
    ☑y verify (what is ☑y☒n ?)
    infobox references

    aluminium oxide (iupac name) or aluminum oxide (american english) is a chemical compound of aluminium and oxygen with the chemical formula al2o3. it is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium(iii) oxide. it is commonly called alumina and may also be called aloxide, aloxite, or alundum depending on particular forms or applications. it occurs naturally in its crystalline polymorphic phase α-al2o3 as the mineral corundum, varieties of which form the precious gemstones ruby and sapphire. al2o3 is significant in its use to produce aluminium metal, as an abrasive owing to its hardness, and as a refractory material owing to its high melting point.[7]

  • natural occurrence
  • properties
  • structure
  • production
  • applications
  • see also
  • references
  • external links

Aluminium oxide
(Aluminum oxide)
Corundum-3D-balls.png
Aluminium oxide2.jpg
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.014.265
EC Number
  • 215-691-6
RTECS number
  • BD120000
UNII
Properties
Al2O3
Molar mass 101.960 g·mol−1
Appearance white solid
Odor odorless
Density 3.987g/cm3
Melting point 2,072 °C (3,762 °F; 2,345 K)[3]
Boiling point 2,977 °C (5,391 °F; 3,250 K)[4]
insoluble
Solubility insoluble in diethyl ether
practically insoluble in ethanol
log P 0.31860[1]
−37.0×10−6 cm3/mol
Thermal conductivity 30 W·m−1·K−1[2]
nω=1.768–1.772
nε=1.760–1.763
Birefringence 0.008
Structure
Trigonal, hR30, space group = R3c, No. 167
a = 478.5 pm, c = 1299.1 pm
octahedral
Thermochemistry
50.92 J·mol−1·K−1[5]
−1675.7 kJ/mol[5]
Pharmacology
WHO)
Hazards
Safety data sheet See: data page
GHS pictograms GHS07: Harmful
NFPA 704 (fire diamond)
Flammability code 0: Will not burn. E.g. waterHealth code 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
0
0
0
Flash point Non-flammable
NIOSH (US health exposure limits):
PEL (Permissible)
OSHA 15 mg/m3 (Total Dust)
OSHA 5 mg/m3 (Respirable Fraction)
ACGIH/TLV 10 mg/m3
REL (Recommended)
none[6]
IDLH (Immediate danger)
N.D.[6]
Related compounds
Other anions
aluminium hydroxide
aluminium sulfide
aluminium selenide
Other cations
boron trioxide
gallium oxide
indium oxide
thallium oxide
Supplementary data page
Refractive index (n),
Dielectric constantr), etc.
Thermodynamic
data
Phase behaviour
solid–liquid–gas
UV, IR, NMR, MS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☑Y verify (what is ☑Y☒N ?)
Infobox references

Aluminium oxide (IUPAC name) or aluminum oxide (American English) is a chemical compound of aluminium and oxygen with the chemical formula Al2O3. It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium(III) oxide. It is commonly called alumina and may also be called aloxide, aloxite, or alundum depending on particular forms or applications. It occurs naturally in its crystalline polymorphic phase α-Al2O3 as the mineral corundum, varieties of which form the precious gemstones ruby and sapphire. Al2O3 is significant in its use to produce aluminium metal, as an abrasive owing to its hardness, and as a refractory material owing to its high melting point.[7]