Aluminium diboride

P6/mmm

Aluminum boride ( ambiguous )

Black solid

Fixed

3.172 g · cm -3

975 ° C ( decomposition)

Reacts slowly with water

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Aluminum diboride is an inorganic chemical compound of the aluminum from the group of borides.

Production and representation

Aluminum diboride can be obtained by reaction of aluminum with boron in a vacuum at 800 ° C.

Properties

Aluminum diboride is a dark solid, which can be in the form of hexagonal platelets shiny. His reaction behavior is very dependent on the particle size. It decomposes at temperatures above 975 ° C in aluminum and aluminum dodecaboride AlB12. It has a hexagonal crystal structure (a = 30.09 pm, c = 32.62 pm ) with the space group P6/mmm and forms mixed crystals with the crystallized in the same lattice magnesium diboride and Mangandiborid.