Script assisted update of identifiers from ChemSpider, CommonChemistry and FDA for the Chem/Drugbox validation project - Updated: StdInChI StdInChIKey. |
Updating {{chembox}} (no changed fields - added verified revid - updated 'UNII_Ref', 'ChemSpiderID_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref') per Chem/Drugbox validation (report [[Wikipedia_talk:Wi |
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| verifiedrevid = 399502050 |
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| Name = Aluminium sulfide |
| Name = Aluminium sulfide |
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| OtherNames = Aluminum sulfide |
| OtherNames = Aluminum sulfide |
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| ImageFile2 = Sulfid hlinitý.PNG |
| ImageFile2 = Sulfid hlinitý.PNG |
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| Section1 = {{Chembox Identifiers |
| Section1 = {{Chembox Identifiers |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID = 140154 |
| ChemSpiderID = 140154 |
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| InChI = 1/2Al.3S/q2*+3;3*-2 |
| InChI = 1/2Al.3S/q2*+3;3*-2 |
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| InChIKey = COOGPNLGKIHLSK-UHFFFAOYAY |
| InChIKey = COOGPNLGKIHLSK-UHFFFAOYAY |
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| SMILES = [Al+3].[Al+3].[S-2].[S-2].[S-2] |
| SMILES = [Al+3].[Al+3].[S-2].[S-2].[S-2] |
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| StdInChI_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChI = 1S/2Al.3S/q2*+3;3*-2 |
| StdInChI = 1S/2Al.3S/q2*+3;3*-2 |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChIKey = COOGPNLGKIHLSK-UHFFFAOYSA-N |
| StdInChIKey = COOGPNLGKIHLSK-UHFFFAOYSA-N |
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| CASNo = 1302-81-4 |
| CASNo = 1302-81-4 |
Revision as of 11:47, 29 November 2010
Names | |
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Other names
Aluminum sulfide
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.013.736 |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
Al2S3 | |
Molar mass | 150.158 g/mol |
Appearance | gray solid |
Density | 2.02 g/cm3 |
Melting point | 1100 °C |
Boiling point | 1500 °C (sublimes) |
decomposes | |
Solubility in other solvents | none |
Structure | |
Trigonal, hP30, SpaceGroup = P61, No. 169 | |
Hazards | |
NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Aluminium sulfide (British English: aluminum sulphide) is the name for the chemical compound with the formula Al2S3. This colorless species has an interesting structural chemistry, existing in three different forms. The material is sensitive to moisture, hydrolyzing readily to hydrated aluminium oxides/hydroxides.[1] The hydrolysis reaction also generates the odoriferous and toxic gas hydrogen sulfide (H2S).
Unlike Al2O3, in which the Al(III) centers occupy octahedral holes, the more expanded framework of Al2S3 stabilizes the Al(III) centers into one third of the tetrahedral holes of a hexagonally close-packed arrangement of the sulfide anions. At higher temperature, the Al(III) centers become randomized to give a "defect wurtzite" structure. And at still higher temperatures stabilize the γ-Al2S3 forms, with a structure akin to γ-Al2O3.
Molecular derivatives of Al2S3 are not known. Mixed Al-S-Cl compounds are however known. Al2Se3 and Al2Te3 are also known.
It can decompose in an oxidizing environment to release sulfur dioxide gas.
Preparation
Aluminium sulfide is readily prepared by ignition of the elements
- 2 Al + 3 S → Al2S3
This reaction is extremely exothermic and it is not necessary or desirable to heat the whole mass of the sulfur-aluminium mixture; (except possibly for very small amounts of reactants). The product will be created in a fused form; it reaches a temperature greater than 1100°C and may melt its way through steel. The cooled product is very hard.
References
- ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.