A family of borate compounds containing an isolated (finite) nonaborate anion
with
the structural formula [B9O12(OH)6]3-;.
Preferred amine nonaborate compounds have a resolved oxide formula of A2O.3B2O3.2H2O,
where A is the monovalent cation of an amine salt, such as guanidinium and imidazolium.
Also provided is a method for preparing these compounds by crystallization from
an aqueous solution under mild conditions without the formation of significant
amounts of by-products. These compounds have potential application as precursors
for the production of advanced boron nitride ceramic materials, and as flame retardants,
corrosion inhibitors, and biocides.
