YB6 is a black odorless powder having density of 3.67 g/cm3; it has the same cubic crystalline structure as other hexaborides (CaB6, LaB6, etc., see infobox). High-quality YB6 crystals of few centimeters in size can be grown by the multiple-pass floating zone technique. YB6 is a superconductor with the relatively high transition temperature (onset) of 8.4 K.
