Samarium(III) phosphate explained

Samarium(III) phosphate is an inorganic compound, with the chemical formula of SmPO₄. It is one of the phosphates of samarium.

Preparation

Samarium(III) phosphate can be obtained by reacting sodium metaphosphate with any soluble samarium(III) salt:

SmCl _{3} +NaPO _{3} +H _{2O} \xrightarrow{ 2 SmPO _{4\downarrow} + NaCl + 2 HCl }

Samarium(III) phosphate can also be obtained by reacting phosphoric acid and samarium(III) chloride.^[1]

Properties

Samarium(III) phosphate reacts with sodium fluoride at 750 °C to form Na₂SmF₂PO₄.^[2] Samarium(III) phosphate forms crystals of the monoclinic crystal system, with space group P2₁/n, and lattice parameters a = 0.6669 nm, b = 0.6868 nm, c = 0.6351 nm, β = 103.92 °, Z = 4.^[3]

Notes and References

1. HIKICHI . Yasuo . MURAYAMA . Kyouhei . OHSATO . Hitoshi . NOMURA . Tsuyoshi . Thermal changes of rare earth phosphate minerals . Journal of the Mineralogical Society of Japan . Japan Association of Mineralogical Sciences . 19 . 3 . 1990 . 1883-7018 . 10.2465/gkk1952.19.117 . 117–126 . ja. free .
2. Zimina, G. V.; Smirnova, I. N.; Gorkovenko, M. Yu.; Spiridonov, F. M.; Komissarova, L. N.; Kaloev, N. I. Synthesis and study of rare earth element fluorophosphates Na2LnF2PO4. Zhurnal Neorganicheskoi Khimii, 1994. 39 (9): 1571-1574. .
3. Inorganica Chimica Acta. 109. 2. en. March 1985. 105–110. 10.1016/S0020-1693(00)84549-1. Coordination geometry and structural determinations of SmPO4,EuPO4 and GdPO4. 2021-11-19. D.F. Mullica, David A. Grossie, L.A. Boatner.