Aluminium oxide

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Aluminium oxide
Aluminium oxide2.jpg
1344-28-1 YesY
ATC code
ChemSpider 8164808 YesY
Jmol-3D images Image
RTECS nummer BD120000
UNII LMI26O6933 YesY
Molar mass 101.96 g·mol−1
Appearance white solid
Odor odorless
Density 3.95–4.1 g/cm3
Meltin pynt 2,072 °C (3,762 °F; 2,345 K)[1]
Boilin pynt 2,977 °C (5,391 °F; 3,250 K)[2]
Solubility insoluble in diethyl ether
practically insoluble in ethanol
Thermal conductivity 30 W·m−1·K−1[3]
Refractive index (nD) nω=1.768–1.772
Birefringence 0.008
Crystal structur Trigonal, hR30, space group = R3c, No. 167
Std enthalpy o
−1675.7 kJ·mol−1[4]
Staundart molar
50.92 J·mol−1·K−1[4]
EU classification {{{value}}}
NFPA 704
Flammability code 0: Will nae burn. E.g., watter Health code 1: Exposur would cause irritation but anly minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even unner fire exposur condeetions, an is nae reactive wi watter. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash pynt {{{value}}}
US health exposure limits (NIOSH):
OSHA 15 mg/m3 (Total Dust)
OSHA 5 mg/m3 (Respirable Fraction)
ACGIH/TLV 10 mg/m3
Related compounds
Ither anions aluminium hydroxide
Ither cations boron trioxide
gallium oxide
indium oxide
thallium oxide
Except whaur otherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
 YesY verify (whit isYesY/N?)
Infobox references

Aluminium oxide is a chemical compoond o aluminium an oxygen wi the chemical formula Template:Aluminium2O3. It is the maist commonly occurring o several aluminium oxides, an specifically identified as aluminium(III) oxide. It is commonly cried alumina, an mey an aa be cried aloxide, aloxite, or alundum dependin on particular furms or applications. It commonly occurs in its crystalline polymorphic phase α-Al2O3, in which it comprises the mineral corundum, varieties o which furm the precious gems ruby an sapphire. Al2O3 is signeeficant in its uise tae produce aluminium metal, as an abrasive owin tae its hairdness, and as a refractory material owin tae its heich meltin pynt.[5]

References[eedit | eedit soorce]

  1. Patnaik, P. (2002). Handbook of Inorganic Chemicals. McGraw-Hill. ISBN 0-07-049439-8. 
  2. Roew, Raymond (2009). "Handbook of Pharmaceutical Excipients": 11–12.  |contribution= ignored (help)
  3. Material Properties Data: Alumina (Aluminum Oxide). Retrieved on 2013-04-17.
  4. 4.0 4.1 Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. ISBN 0-618-94690-X. 
  5. "Alumina (Aluminium Oxide) – The Different Types of Commercially Available Grades". The A to Z of Materials. Archived frae the oreeginal on 10 October 2007. Retrieved 2007-10-27.