Английская Википедия:Europium(III) phosphate

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Europium(III) phosphate is one of the phosphates of europium, with the chemical formula of EuPO4. Other phosphates include europium(II) phosphate (Eu3(PO4)2) and europium(II,III) phosphate (Eu3Eu(PO4)3).[1]

Preparation

Europium phosphate can be produced by the sol-gel method of europium(III) oxide. First, europium(III) oxide was dissolved in an equimolar amount of nitric acid, and then an excess of 10% phosphoric acid was added. The process also requires the addition of ammonia to adjust the pH to 4 and form a gel, which is then washed with water and heated to 1200 °C for a day.[2][3]

Properties

Europium(III) phosphate is isotypic to CePO4 and crystallizes in the monazite structure type, in the space group P21/n (no. 14, position 2) with the lattice parameters a = 668.13(10), b = 686.18(9), c = 634.91(8) pm and β = 103.96(1)° with four formula units per unit cell.[4] Its heat capacity is 111.5 J·K−1·mol−1 at 298.15 K,[2][3] and its bulk modulus is 159(2) GPa.[5]

References

Шаблон:Reflist Шаблон:Europium compounds Шаблон:Phosphates

  1. Шаблон:Cite journal
  2. 2,0 2,1 Шаблон:Cite journal
  3. 3,0 3,1 Шаблон:Cite journal
  4. Ошибка цитирования Неверный тег <ref>; для сносок Yunxiang не указан текст
  5. Шаблон:Cite journal