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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/c3*2-1(3)4;;/h3*(H2,2,3,4);;/q;;;2*+3/p-6Key: XIRHLBQGEYXJKG-UHFFFAOYSA-H
SMILES anhydrous: C(=O)().C(=O)().C(=O)()..
Properties
Chemical formula	Pr2(CO3)3
Molar mass	461.849 (anhydrous) 605.977 (octahydrate)
Appearance	green crystals (octahydrate)
Solubility in water	insoluble (1.99×10mol/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 , 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. They are all insoluble in water.

Preparation

Praseodymium(III) carbonate can be obtained by the hydrolysis of praseodymium(III) chloroacetate:

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.

Chemical properties

Praseodymium(III) carbonate is soluble in acids, and emits carbon dioxide:

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

However, it is insoluble in water.

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/cm.

References

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

• Praseodymium(III) compounds
• Carbonates