Aluminium dodecaboride

Aluminium dodecaboride
Names
	IUPAC name Aluminium dodecaboride
	Other names Aluminium boride
Identifiers
CAS Number	12041-54-2 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.031.737
EC Number	234-924-2
PubChem CID	6336895;
	InChI InChI=1S/Al.12B Key: JXOOCQBAIRXOGG-UHFFFAOYSA-N;
	SMILES [B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[B].[Al];
Properties
Chemical formula	AlB12
Molar mass	156.714 g/mol[1]
Appearance	Yellow to black solid[1]
Density	2.55 g/cm3[1]
Melting point	2,070 °C (3,760 °F; 2,340 K)=[1]
Solubility in water	insoluble
Solubility	soluble in hot nitric acid (decomposes),[2]; soluble in nitric acid (decomposes),[3]; soluble in sulfuric acid (decomposes)[3]
Structure
Crystal structure	Tetragonal (α-form) ; Orthorhombic (β-form)
	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.

Properties

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.^[4] The phase β-AlB₁₂ is now believed to be the ternary boride C₂Al₃B₄₈.^[5]

Preparation

The β-form can be prepared by the reaction of boron(III) oxide with sulfur and aluminum, then adding carbon to the mixture.

Uses

AlB₁₂ is used as a grinding compound to replace diamond or corundum.

Footnotes

1 2 3 4 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.45. ISBN 1439855110.
↑ Martienssen, Werner; Warlimont, Hans, eds. (2005). Springer Handbook of Condensed Matter and Materials Data. Springer-Verlag. ISBN 9783540443766.
1 2 Rebekoff Reeve, Martin (1991) Method of producing an aluminium boride. EP 0130016 B1
↑ Higashi, Iwami (2000). "Crystal chemistry of α-AlB₁₂ and γ-AlB₁₂". Journal of solid state chemistry. 154: 168. Bibcode:2000JSSCh.154..168H. doi:10.1006/jssc.2000.8831.
↑ Matkovich, V. I; Giese, R. F; Economy, J (1965). "Phases and twinning in C₂Al₃B₄₈ (β-AlB₁₂)". Zeitschrift für Kristallographie. 122: 108. Bibcode:1965ZK....122..108M. doi:10.1524/zkri.1965.122.1-2.108.

External links

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[b92-1] 1 2 3 4 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.45. ISBN 1439855110.

[2] Martienssen, Werner; Warlimont, Hans, eds. (2005). Springer Handbook of Condensed Matter and Materials Data. Springer-Verlag. ISBN 9783540443766.

[r1-3] 1 2 Rebekoff Reeve, Martin (1991) Method of producing an aluminium boride. EP 0130016 B1

[4] Higashi, Iwami (2000). "Crystal chemistry of α-AlB₁₂ and γ-AlB₁₂". Journal of solid state chemistry. 154: 168. Bibcode:2000JSSCh.154..168H. doi:10.1006/jssc.2000.8831.

[5] Matkovich, V. I; Giese, R. F; Economy, J (1965). "Phases and twinning in C₂Al₃B₄₈ (β-AlB₁₂)". Zeitschrift für Kristallographie. 122: 108. Bibcode:1965ZK....122..108M. doi:10.1524/zkri.1965.122.1-2.108.