Yttrium(III) phosphate

Preparation

Yttrium phosphate can be obtained by reacting yttrium chloride and sodium phosphate, or by reacting yttrium nitrate and diammonium hydrogen phosphate in solution:

: :

Yttrium phosphate can also be prepared by the reaction of yttrium(III) oxide and diammonium hydrogen phosphate:

:

Yttrium chloride and phosphoric acid are mixed at 35~40°C, and then ammonia solution is added dropwise to react:

:

Properties

Yttrium phosphate belongs to the tetragonal crystal system, and the unit cell parameters are a=0.68832 nm, c=0.60208 nm. It can exist as a monohydrate, dihydrate or the anhydrous form. The dihydrate belongs to the monoclinic crystal system, the space group is B 2/b, and the unit cell parameters are a=0.648 nm, b=1.512 nm, c=0.628 nm, β=129.4°, Z=4.

Yttrium phosphate reacts with concentrated alkali to form yttrium hydroxide.

Uses

Yttrium phosphate is used as a catalyst and is a potential containment material for nuclear waste. Double-doped materials such as Ce3+-Tb3+ have also been reported.

References

References

1. {{Greenwood&Earnshaw2nd
2. (1992). "Dictionary of inorganic compounds". Chapman & Hall.
3. minsocam.org: [http://www.minsocam.org/ammin/AM29/AM29_92.pdf WEINSCHENKITE, YTTRIUM PHOSPHATE DIHYDRATE], retrieved 16 May 2014
4. Georg Brauer: Handbuch der Präparativen Anorganischen Chemie. 3., umgearb. Auflage. Band I. Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 1114.
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