// Workers AI · dad joke modeWhy did thulium phosphate go to therapy? It had a bonding issue.
| Names | |
|---|---|
| Other names
Thulium orthophosphate | |
| Identifiers | |
CompTox Dashboard (EPA) |
|
| Properties | |
| TmPO4 | |
| Molar mass | 263.90 g/mol |
| Appearance | Solid |
| Very slightly soluble in water | |
| Structure | |
| Tetragonal, xenotime type | |
| I41/amd, No. 141 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Thulium phosphate is an inorganic compound of thulium and phosphate with the chemical formula TmPO4. Hydrated forms are also known.
Preparation
[edit]Hydrated thulium phosphate can be prepared by precipitation from aqueous solutions of thulium(III) chloride and sodium phosphate. A dihydrate has been reported, which can be converted to anhydrous TmPO4 by heating.[1]
Single crystals of anhydrous TmPO4 can also be grown from a melt containing thulium(III) oxide, ammonium dihydrogen phosphate, lead(II) oxide and phosphorus pentoxide.[2]
Structure and properties
[edit]Anhydrous thulium phosphate crystallizes in the tetragonal crystal system with the xenotime structure, which is closely related to the zircon structure. It belongs to space group I41/amd (No. 141).[2]
The structure consists of isolated PO4 tetrahedra and eight-coordinate Tm3+ ions. Single-crystal X-ray diffraction and first-principles calculations have been used to study its compression, elastic properties and structural stability.[2] TmPO4 is more resistant to volume compression than to shear deformation, and its elastic anisotropy increases under pressure.[2]
TmPO4 is also a Van Vleck paramagnet. Its magnetic behaviour is dominated by the crystal-field splitting of the Tm3+ 4f levels, and high-field measurements show a field-induced crossover near 30 T at low temperature.[3]
Crystal-field excitations in TmPO4 have also been studied by inelastic neutron scattering.[4]
Reactions
[edit]Thulium phosphate reacts with sodium fluoride under suitable solid-state conditions to form the fluorophosphate Na3Tm2F3PO4.[5]
References
[edit]- ↑ Kalieva, K.; Stretkova, Z. V.; Babynina, N. A.; Gordienko, L. N.; Votoyarov, M.; Yakimov; Sakavov, I. E.; Mustaev, A. K. "X-ray diffraction studies of praseodymium, neodymium, europium, terbium, dysprosium, erbium, holmium, and terbium orthophosphates". Tr. Kirg. Univ., Ser. Khim. Nauk. 1972. 2: 84–89.
- 1 2 3 4 Gomis, O.; Lavina, B.; Rodríguez-Hernández, P.; Muñoz, A.; Errandonea, R.; Errandonea, D.; Bettinelli, M. (2017). "High-pressure structural, elastic, and thermodynamic properties of zircon-type HoPO4 and TmPO4". Journal of Physics: Condensed Matter. 29 (9) 095401. arXiv:1705.10721. doi:10.1088/1361-648X/aa516a. PMID 28106012.
- ↑ Kirste, A.; von Ortenberg, M.; Demidov, A. A.; Kazei, Z. A.; Kolmakova, N. P.; Platonov, V. V.; Sidorenko, A. A.; Tatsenko, O. M. (2003). "Crossover in the Van Vleck paramagnet TmPO4". Physica B: Condensed Matter. 336 (3–4): 335–343. doi:10.1016/S0921-4526(03)00300-4.
- ↑ Loong, C.-K.; Soderholm, L.; Abraham, M. M.; Boatner, L. A. (1993). "Crystal-field excitations and magnetic properties of TmPO4". The Journal of Chemical Physics. 98 (5): 4214–4222. doi:10.1063/1.465028.
- ↑ ZIMINA, G. V.; SMIRNOVA, I. N.; GORKOVENKO, M. YU.; SPIRIDONOV, F. M.; KOMISSAROVA, L. N.; KALOEV, N. I. (1995-02-21). "ChemInform Abstract: Synthesis and Studies of Fluorophosphates of Rare Earth Elements Na2LnF2PO4". ChemInform. 26 (8). doi:10.1002/chin.199508015. ISSN 0931-7597.