Names | |
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IUPAC name
Aluminium dodecaboride
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Other names
Aluminium boride
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Identifiers | |
3D model (JSmol)
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ECHA InfoCard | 100.031.737 |
EC Number | 234-924-2 |
PubChem CID
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Properties | |
AlB12 | |
Molar mass | 156.714 g/mol |
Appearance | Yellow to black solid |
Density | 2.56 g/cm3 |
Melting point | 2,200 °C (3,990 °F; 2,470 K) |
insoluble | |
Solubility | soluble in hot nitric acid(decomposes), soluble in nitric acid(decomposes), soluble in sulfuric acid(decomposes) |
Structure | |
Tetragonal (α-form) Orthorhombic (β-form) |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references | |
Aluminium dodecaboride (AlB12) is a chemical compound made from the metal aluminium and the non-metal boron. It is one of two chemical compounds that are commonly called aluminium boride; the other is aluminium diboride, AlB2.
There are two crystalline forms, α-AlB12, and γ-AlB12. Both forms are very similar and consist of a framework with three-dimensional networks of B12 and B20 units. The phase β-AlB12 is now believed to be the ternary boride C2Al3B48.
The β-form can be prepared by the reaction of boron(III) oxide with sulfur and aluminum, then adding carbon to the mixture.
AlB12 is used as a grinding compound to replace diamond or corundum.