Europium(III) phosphate

Europium(III) phosphate
Identifiers
CAS Number	13537-10-5; hydrate: 14913-20-3; 15259-63-9 semihydrate; dihydrate: 34377-51-0; trihydrate: 49836-68-2;
3D model (JSmol)	Interactive image; hydrate: Interactive image; dihydrate: Interactive image; trihydrate: Interactive image;
ChemSpider	4896052;
ECHA InfoCard	100.033.532
EC Number	236-901-2; hydrate: 693-463-9;
PubChem CID	6365242; hydrate: 16217374;
CompTox Dashboard (EPA)	DTXSID80928975 ; hydrate: DTXSID20584352;
	InChI InChI=1S/Eu.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/p-3 Key: VTZYNNDLDPSINP-UHFFFAOYSA-K; hydrate: InChI=1S/Eu.H3O4P.H2O/c;1-5(2,3)4;/h;(H3,1,2,3,4);1H2/q+3;;/p-3 Key: BOCFVANIXFYKBV-UHFFFAOYSA-K;
	SMILES [O-]P(=O)I([O-])[O-].[Eu+3]; hydrate: [O-]P(=O)I([O-])[O-].[Eu+3].O; dihydrate: [O-]P(=O)I([O-])[O-].[Eu+3].O.O; trihydrate: [O-]P(=O)I([O-])[O-].[Eu+3].O.O.O;
Properties
Chemical formula	EuO4P
Molar mass	246.934 g·mol−1
Appearance	colourless solid
Density	5.81 g·cm−3
Melting point	2,200 °C (3,990 °F; 2,470 K)
Solubility in water	insoluble
Structure
Crystal structure	Monazite
Space group	P21/n (No. 14)
Lattice constant	a = 668.13(10), b = 686.18(9), c = 634.91(8) pm α = 90°, β = 103.96(1)°, γ = 90°
Thermochemistry
Heat capacity (C)	111.5 J/mol·K
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

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).^[7]

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.^[5]^[6]

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.^[2] Its heat capacity is 111.5 J·K⁻¹·mol⁻¹ at 298.15 K,^[5]^[6] and its bulk modulus is 159(2) GPa.^[8]

References

^ Macintyre, J. E.; Chapman and Hall (1992). Dictionary of inorganic compounds. London: Chapman & Hall. p. 3124. ISBN 0-412-30120-2. OCLC 26338506.
^ ^a ^b ^c Ni, Yunxiang; Hughes, John M.; Mariano, Anthony N. (1995-02-01). "Crystal chemistry of the monazite and xenotime structures". American Mineralogist. 80 (1–2). Mineralogical Society of America: 21–26. Bibcode:1995AmMin..80...21N. doi:10.2138/am-1995-1-203. ISSN 0003-004X. S2CID 55776047.
^ "Europium Phosphate – ProChem, Inc". prochemonline.com. Archived from the original on 2021-06-22. Retrieved 2022-06-08.
^ Hughes, John M.; Kohn, Matthew J.; Rakovan, John (2018). Phosphates : Geochemical, Geobiological and Materials Importance. Berlin. p. 91. ISBN 978-1-5015-0963-6. OCLC 1083603252.{{cite book}}: CS1 maint: location missing publisher (link)
^ ^a ^b ^c Popa, K.; Konings, R.J.M. (2006). "High-temperature heat capacities of EuPO₄ and SmPO₄ synthetic monazites". Thermochimica Acta. 445 (1). Elsevier BV: 49–52. doi:10.1016/j.tca.2006.03.023. ISSN 0040-6031.
^ ^a ^b ^c Gavrichev, K. S.; Ryumin, M. A.; Tyurin, A. V.; Gurevich, V. M.; Komissarova, L. N. (2009). "The heat capacity and thermodynamic functions of EuPO₄ over the temperature range 0–1600 K". Russian Journal of Physical Chemistry A. 83 (6). Pleiades Publishing Ltd: 901–906. Bibcode:2009RJPCA..83..901G. doi:10.1134/s0036024409060053. ISSN 0036-0244. S2CID 98200684.
^ Grunwald, Waldemar; Wittich, Knut; Glaum, Robert (2018-08-06). "Anhydrous Europium Phosphates: A Comprehensive Report on Syntheses, Crystal Structures, and Phase Relations". Zeitschrift für anorganische und allgemeine Chemie. 644 (22). Wiley: 1403–1414. doi:10.1002/zaac.201800193. ISSN 0044-2313. S2CID 104565178.
^ Lacomba-Perales, R.; Errandonea, D.; Meng, Y.; Bettinelli, M. (2010-02-24). "High-pressure stability and compressibility of A PO 4 ( A = La , Nd, Eu, Gd, Er, and Y) orthophosphates: An x-ray diffraction study using synchrotron radiation". Physical Review B. 81 (6): 064113. arXiv:0911.5669. doi:10.1103/PhysRevB.81.064113. ISSN 1098-0121. S2CID 119249866.

[1] Macintyre, J. E.; Chapman and Hall (1992). Dictionary of inorganic compounds. London: Chapman & Hall. p. 3124. ISBN 0-412-30120-2. OCLC 26338506.

[Yunxiang-2] Ni, Yunxiang; Hughes, John M.; Mariano, Anthony N. (1995-02-01). "Crystal chemistry of the monazite and xenotime structures". American Mineralogist. 80 (1–2). Mineralogical Society of America: 21–26. Bibcode:1995AmMin..80...21N. doi:10.2138/am-1995-1-203. ISSN 0003-004X. S2CID 55776047.

[3] "Europium Phosphate – ProChem, Inc". prochemonline.com. Archived from the original on 2021-06-22. Retrieved 2022-06-08.

[4] Hughes, John M.; Kohn, Matthew J.; Rakovan, John (2018). Phosphates : Geochemical, Geobiological and Materials Importance. Berlin. p. 91. ISBN 978-1-5015-0963-6. OCLC 1083603252.{{cite book}}: CS1 maint: location missing publisher (link)

[:0-5] Popa, K.; Konings, R.J.M. (2006). "High-temperature heat capacities of EuPO₄ and SmPO₄ synthetic monazites". Thermochimica Acta. 445 (1). Elsevier BV: 49–52. doi:10.1016/j.tca.2006.03.023. ISSN 0040-6031.

[:1-6] Gavrichev, K. S.; Ryumin, M. A.; Tyurin, A. V.; Gurevich, V. M.; Komissarova, L. N. (2009). "The heat capacity and thermodynamic functions of EuPO₄ over the temperature range 0–1600 K". Russian Journal of Physical Chemistry A. 83 (6). Pleiades Publishing Ltd: 901–906. Bibcode:2009RJPCA..83..901G. doi:10.1134/s0036024409060053. ISSN 0036-0244. S2CID 98200684.

[7] Grunwald, Waldemar; Wittich, Knut; Glaum, Robert (2018-08-06). "Anhydrous Europium Phosphates: A Comprehensive Report on Syntheses, Crystal Structures, and Phase Relations". Zeitschrift für anorganische und allgemeine Chemie. 644 (22). Wiley: 1403–1414. doi:10.1002/zaac.201800193. ISSN 0044-2313. S2CID 104565178.

[8] Lacomba-Perales, R.; Errandonea, D.; Meng, Y.; Bettinelli, M. (2010-02-24). "High-pressure stability and compressibility of A PO 4 ( A = La , Nd, Eu, Gd, Er, and Y) orthophosphates: An x-ray diffraction study using synchrotron radiation". Physical Review B. 81 (6): 064113. arXiv:0911.5669. doi:10.1103/PhysRevB.81.064113. ISSN 1098-0121. S2CID 119249866.

[1]