硼化镨

Praseodymium Boride, also called Praseodymium Hexaboride, is one of the rare earth borides, the molecular formula is PrB₆. The rare-earth hexaborides have the cubic CaB₆ structure , with rare-earth ions lying on a simple cubic lattice enclosing an octahedral B₆ cage. Praseodymium hexaboride PrB₆ and neodymium hexaboride NdB₆ are also antiferromagnetic metals in which the magnetic properties are treated as being governed by localized magnetic moments of rare earth ions that interact with each other through conduction electrons (the Ruderman–Kittel–Kasuya–Yosida mechanism). praseodymium hexaboride is believed to have a higher emission constant, and a lower volatility and congruent vaporization, which give rise to a lower operation temperature and longer service life comparing with conventional cathodic emission materials.