Aluminium dodecaboride
| Names | |
|---|---|
| IUPAC name
Aluminium dodecaboride | |
| Other names
Aluminium boride | |
| Identifiers | |
12041-54-2  | |
| ECHA InfoCard | 100.031.737 |
| EC Number | 234-924-2 |
| 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),[1] soluble in nitric acid(decomposes),[2] soluble in sulfuric acid(decomposes)[3] |
| 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). | |
 verify (what is ?) | |
| 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.
See also
Footnotes
- ↑ http://www.springer.com/us/book/9783540443766
- ↑ http://www.google.com/patents/EP0130016B1?cl=en
- ↑ http://www.google.com/patents/EP0130016B1?cl=en
- ↑ Crystal chemistry of α-AlB12 and γ-AlB12., Higashi, Iwami; Journal of solid state chemistry 2000, vol. 154, no 1, 168-176,doi:10.1006/jssc.2000.8831
- ↑ Phases and twinning in C2Al3B48 (β-AlB12), Matkovich V. I. , Giese R. F. ; Economy J. Z. Krist. 122, 108-15. (1965)
External links
This article is issued from Wikipedia - version of the 7/7/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.