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Yttrium is a chemical element; it has symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a "rare-earth element". [8] Yttrium is almost always found in combination with lanthanide elements in rare-earth minerals and is never found in nature as a free ...
Yttrium nitrate: Y(NO 3) 3: 274.927: Yttrium oxalate tetrahydrate: C 6 O 12 Y 2: 441.86 [9] Yttrium orthovanadate: YVO 4: 203.84: Yttrium(III) oxide: Y 2 O 3: 225.81: Yttrium(III) perchlorate: Y(ClO 4) 3: 387.265: Yttrium(III) perchlorate hexahydrate: Y(ClO 4) 3 ·6H 2 O: 495.361: Yttrium phosphide: YP: 119.88: Yttrium phosphate: YPO 4: 183.877 ...
Natural yttrium (39 Y) is composed of a single isotope yttrium-89. The most stable radioisotopes are 88 Y, which has a half-life of 106.6 days, and 91 Y, with a half-life of 58.51 days. All the other isotopes have half-lives of less than a day, except 87 Y, which has a half-life of 79.8 hours, and 90 Y, with 64 hours.
Yttrium hydroxide can be decomposed by heating. Firstly, basic yttrium oxide (YO(OH)) is formed, and when heating is continued yttrium oxide is obtained. Both yttrium oxide and yttrium hydroxide are easily soluble in strong acids to form corresponding yttrium salts. Yttrium chalcogenides Y 2 S 3, Y 2 Se 3, and Y 2 Te 3 are known. They can be ...
Yttrium hydride is a compound of hydrogen and yttrium. It is considered to be a part of the class of rare-earth metal hydrides. It exists in several forms, the most common being a metallic compound with formula YH 2. YH 2 has a face-centred cubic structure, and is a metallic compound.
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