Characteristic
Tantalum borides are compounds of tantalum and boron most remarkable for their extreme hardness.
The Vickers hardness of TaB and TaB2 films and crystals is ~30 GPa. Those materials are stable to oxidation below 700 °C and to acid corrosion.
TaB2 has the same hexagonal structure as most diborides (AlB2, MgB2, etc.). The mentioned borides have the following space groups: TaB (orthorhombic, Thallium(I) iodide-type, Cmcm), Ta5B6 (Cmmm), Ta3B4 (Immm), TaB2 (hexagonal, aluminum diboride-type, P6/mmm).
.jpg "Tantalum Diboride (TaB2)-Powder")
.jpg "Nickel(II) formate dihydrate (Ni(HCO2)2•2H2O)-Powder")
.jpg "Cobalt Sulfide (CoS2)-Powder")
.jpg "Boron (B)-Powder")
.jpg "Zinc Oxide-Molybdenum Oxide (ZnO-MoO3 (3 Wt%))-Sputtering Target")
.jpg "Atomized Aluminum Magnesium Alloy (AlMg(90:10))-Powder")
.jpg "Magnesium chloride hexahydrate (MgCl2•6H2O)-Powder")
