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Praseodymium(III) carbonate
Names
	IUPAC name Praseodymium(III) carbonate
Identifiers
CAS Number	anhydrous: 5895-45-4 ; octahydrate: 14948-62-0 ;
3D model (JSmol)	anhydrous: Interactive image;
EC Number	anhydrous: 227-578-9;
PubChem CID	anhydrous: 165369;
CompTox Dashboard (EPA)	anhydrous: DTXSID00648481 ;
	InChI anhydrous: InChI=1S/3CH2O3.2Pr/c32-1(3)4;;/h3(H2,2,3,4);;/q;;;2*+3/p-6 Key: XIRHLBQGEYXJKG-UHFFFAOYSA-H;
	SMILES anhydrous: C(=O)([O-])[O-].C(=O)([O-])[O-].C(=O)([O-])[O-].[Pr+3].[Pr+3];
Properties
Chemical formula	Pr2(CO3)3
Molar mass	461.849 (anhydrous); 605.977 (octahydrate)
Appearance	green crystals (octahydrate)
Solubility in water	insoluble; (1.99×10−6mol/L)
Related compounds
Other anions	Praseodymium(III) chloroacetate; Praseodymium(III) sulfate; Praseodymium(III) nitrate
Other cations	cerium carbonate; neodymium carbonate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Praseodymium(III) carbonate is an inorganic compound, with a chemical formula of Pr₂(CO₃)₃. The anhydrous form is olive green, and many of its hydrates such as heptahydrate and octahydrate are known.^[3] They are all insoluble in water.^[2]

Preparation

Praseodymium(III) carbonate can be obtained by the hydrolysis of praseodymium(III) chloroacetate:^[2]^[4]

2 Pr(C₂Cl₃O₂)₃ + 3 H₂O → Pr₂(CO₃)₃ + 6 CHCl₃ + 3 CO₂

It can also be obtained by reacting sodium bicarbonate saturated with carbon dioxide with a praseodymium chloride solution.^[4]

Chemical properties

Praseodymium(III) carbonate is soluble in acids, and emits carbon dioxide:^[5]

Pr₂(CO₃)₃ + 6 H⁺ → 2 Pr³⁺ + 3 H₂O + 3 CO₂↑

However, it is insoluble in water.^[2]

Other compounds

Praseodymium(III) carbonate forms compounds with N₂H₄, such as Pr₂(CO₃)₃•12N₂H₄•5H₂O which is a pale green crystal that is slightly soluble in water but insoluble in benzene, with d20°C = 1.873 g/cm³.^[6]

References

^ 《化学化工物性数据手册》 (无机卷) . 化学工业出版社. P₃₂₀. 7.2 碳酸盐. ISBN 7-5025-3591-8
^ ^a ^b ^c ^d 《无机化学丛书》. 第七卷钪稀土元素. 易宪武黄春晖等编.科学出版社. P₁₇₄. 碳酸盐. ISBN 978-7-03-030574-9
^ Rare earth elements: Main volume, Phần 3 (Leopold Gmelin; Verlag Chemie, 1994), page 22; 68. Retrieved 4 Feb 2021.
^ ^a ^b 冯天泽. 稀土碳酸盐的制法、性质和组成. 《稀土》. 1989年第3期. pp.45～49
^ PubChem. "Praseodymium Carbonate Octahydrate". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-07-10.
^ Uchenye zapiski: Serii︠a︡ khimicheskikh nauk (S.M. Kirov adyna Azărbai̐jan Dȯvlăt Universiteti; 1977), page 37. Retrieved 7 Feb 2021.

[sc-1] 《化学化工物性数据手册》 (无机卷) . 化学工业出版社. P₃₂₀. 7.2 碳酸盐. ISBN 7-5025-3591-8

[wj-2] 《无机化学丛书》. 第七卷钪稀土元素. 易宪武黄春晖等编.科学出版社. P₁₇₄. 碳酸盐. ISBN 978-7-03-030574-9

[gmelin-3] Rare earth elements: Main volume, Phần 3 (Leopold Gmelin; Verlag Chemie, 1994), page 22; 68. Retrieved 4 Feb 2021.

[f-4] 冯天泽. 稀土碳酸盐的制法、性质和组成. 《稀土》. 1989年第3期. pp.45～49

[5] PubChem. "Praseodymium Carbonate Octahydrate". pubchem.ncbi.nlm.nih.gov. Retrieved 2022-07-10.

[6] Uchenye zapiski: Serii︠a︡ khimicheskikh nauk (S.M. Kirov adyna Azărbai̐jan Dȯvlăt Universiteti; 1977), page 37. Retrieved 7 Feb 2021.

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