*** Welcome to piglix ***

Aluminium dodecaboride

Aluminium dodecaboride
Names
IUPAC name
Aluminium dodecaboride
Other names
Aluminium boride
Identifiers
3D model (JSmol)
ECHA InfoCard 100.031.737
EC Number 234-924-2
PubChem CID
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)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YesYN ?)
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.


...
Wikipedia

...