三氟化镨

三氟化镨

别名	氟化镨氟化镨(III)
识别
CAS号	13709-46-1 ^Y
SMILES	[Pr+3].[F-].[F-].[F-]
性质
化学式	PrF₃
摩尔质量	197.9028 g·mol⁻¹
密度	6.267 g·cm⁻³^[1]
熔点	1370 °C^[2]
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

三氟化镨是一种无机化合物，化学式为PrF₃，是镨最稳定的氟化物。

制备

三氟化镨通常利用复分解法来制备，如硝酸镨和氟化钠反应，生成的浅绿色沉淀即为三氟化镨：^[3]

Pr(NO₃)₃ + 3 NaF → 3 NaNO₃ + PrF₃

无水氯化镨和三氟化铝共熔，三氯化铝升华后，可以得到三氟化镨。^[4]

也有文献报道三氟化氯和镨的各种氧化物（Pr₂O₃、Pr₆O₁₁以及PrO₂）反应，三氟化镨是唯一产物。三氟化溴和在空气中放置一段时间的氧化镨反应也有三氟化镨生成，但反应不完全；草酸镨的水合物和三氟化溴反应，可以得到三氟化镨，并且有碳生成。^[5]氧化镨和六氟化硫在584 °C反应，也能得到三氟化镨。^[6]

参考文献

^ E. A. Krivandina, Z. I. Zhmurova, B. P. Sobolev, T. M. Glushkova, D. F. Kiselev, M. M. Firsova, A. P. Shtyrkova. Growth of R 1 − y Sr y F3 − y crystals with rare earth elements of the cerium subgroup (R = La, Ce, Pr, or Nd; 0 ≤ y ≤ 0.16) and the dependence of their density and optical characteristics on composition. Crystallography Reports. 2006-10, 51 (5): 895–901 [2019-03-26]. ISSN 1063-7745. doi:10.1134/S106377450605021X （英语）.
^ H. von Wartenberg. The melting points of neodymium and praseodymium fluorides. Naturwissenschaften, 1941. 29: 771. ISSN: 0028-1042.
^ Lin Ma, Wei-Xiang Chen, Yi-Fan Zheng, Jie Zhao, Zhude Xu. Microwave-assisted hydrothermal synthesis and characterizations of PrF3 hollow nanoparticles. Materials Letters. 2007-5, 61 (13): 2765–2768 [2019-03-26]. doi:10.1016/j.matlet.2006.04.124. （原始内容存档于2018-07-02）（英语）. 请检查|date=中的日期值 (帮助)
^ Polyachenok, O. G. Enthalpy of formation of lanthanum and praseodymium fluorides. Zhurnal Neorganicheskoi Khimii, 1965. 10 (8): 1939-1940. ISSN: 0044-457X.
^ Alexander I. Popov, George Glockler. Observations on the Fluorination of Praseodymium and Neodymium Compounds. Journal of the American Chemical Society. 1952-3, 74 (5): 1357–1358 [2019-03-26]. ISSN 0002-7863. doi:10.1021/ja01125a521. （原始内容存档于2020-11-07）（英语）. 请检查|date=中的日期值 (帮助)
^ Opalovskii, A. A.; Lobkov, E. U.; Erenburg, B. G.; Zakhar'ev, Yu. V.; Shingarev, V. G. Reaction of sulfur hexafluoride with rare earth oxides（俄文）. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1972. 10 (8): 1877. ISSN: 0002-337X.

镨化合物

Pr₂(CO₃)₃
Pr(CH₃COO)₃
Pr(acac)₃
Pr₂(C₂O₄)₃
Pr(C₅H₅)₃

Pr(NO₃)₃
Pr(CN)₃

Pr₂O₃
PrO₂
Pr₆O₁₁
Pr(OH)₃

PrF₃
PrF₄

PrPO₄
PrP

Pr₂S₃
Pr₂(SO₄)₃

PrCl₃
Pr(ClO₄)₃

PrScO₃

Pr[Fe(CN)₆]

PrAsO₄

PrSe
Pr₂(SeO₄)₃

PrBr₃
Pr(BrO₃)₃

PrI₂
PrI₃
Pr(IO₃)₃

镧系

Pr₂(WO₄)₃

锕系

↓

镧系

Pr/Nd

锕系

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