page_title: Yttrium compounds
section_title: Binary compounds
hierarchical_section_title: Yttrium compounds / Binary compounds
caption_attribution_description: English: Two single crystals of YB66 grown by zone melting using (100) oriented seeds. In the top crystal, the seed (left from the black line) has same diameter as the crystal. In the bottom crystal (sliced), the seed is much thinner and is on the right.
context_page_description: An yttrium compound is a chemical compound containing yttrium. Among these compounds, yttrium generally has a +3 valence. The solubility properties of yttrium compounds are similar to those of the lanthanides. For example oxalates and carbonates are hardly soluble in water, but soluble in excess oxalate or carbonate solutions as complexes are formed. Sulfates and double sulfates are generally soluble. They resemble the "yttrium group" of heavy lanathanide elements.
context_section_description: Two yttrium hydrides are known at standard conditions, YH₂ and YH₃. Under high pressures, YH₉, a polyhydride is stable under pressure, and is a superconductor at temperatures up to 243K.
  Yttrium and pnictides can form compounds with the chemical formula YE (E = N, P, As, Sb). They can be hydrolyzed in humid air and emit volatile hydrides EH₃.
  Yttrium and carbon can form a variety of compounds, such as Y₂C₃, YC₂. They can be made in several ways:
  2 Y + 3 C → Y₂C₃
  Y₂O₃ + 7 C → 2 YC₂ + 3 CO ↑
  There are also several yttrium silicides, such as YSi₂, Y₅Si₄ and YSi.
  Yttrium and boron can also form many colourful compounds, such as gold YB₄ , blue YB₆ , light blue YB₁₂. They are metallic; YB₆₆ is a semiconductor, and the resistivity at room temperature is 10⁶ Ω·cm.
caption: YB66 grown by zone melting
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