Yttrium borides

（重定向自Yttrium boride）

Crystal structure of YB25. Black and green spheres indicate Y and B atoms, respectively.[13]

Yttrium boride refers to a crystalline material composed of different proportions of yttrium and boron, such as YB₂, YB₄, YB₆, YB₁₂, YB₂₅, YB₅₀ and YB₆₆. They are all gray-colored, hard solids having high melting temperatures. The most common form is the yttrium hexaboride YB₆. It exhibits superconductivity at relatively high temperature of 8.4 K and, similar to LaB₆, is an electron cathode. Another remarkable yttrium boride is YB₆₆. It has a large lattice constant (2.344 nm), high thermal and mechanical stability, and therefore is used as a diffraction grating for low-energy synchrotron radiation (1–2 keV).

单词	Yttrium boride
释义	Yttrium boride 英语百科 Yttrium borides （重定向自Yttrium boride） Yttrium boride refers to a crystalline material composed of different proportions of yttrium and boron, such as YB₂, YB₄, YB₆, YB₁₂, YB₂₅, YB₅₀ and YB₆₆. They are all gray-colored, hard solids having high melting temperatures. The most common form is the yttrium hexaboride YB₆. It exhibits superconductivity at relatively high temperature of 8.4 K and, similar to LaB₆, is an electron cathode. Another remarkable yttrium boride is YB₆₆. It has a large lattice constant (2.344 nm), high thermal and mechanical stability, and therefore is used as a diffraction grating for low-energy synchrotron radiation (1–2 keV).
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