Iron(II) carbonate
| Names | |
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| Other names
ferrous carbonate
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| Identifiers | |
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3D model (Jmol)
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| ECHA InfoCard | 100.008.418 |
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PubChem CID
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| Properties | |
| Molar mass | 115.854 g/mol |
| Appearance | white powder or crystals |
| Density | 3.9 g/cm3 |
| Melting point | decomposes |
| 0.0067 g/l; Ksp = 1.28 × 10−11 | |
| +11,300·10−6 cm3/mol | |
| Structure | |
| Hexagonal scalenohedral / Trigonal (32/m) Space group: R 3c, a = 4.6916 Å, c = 15.3796 Å |
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| 6 | |
| Related compounds | |
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Other anions
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copper(II) carbonate, zinc carbonate |
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Other cations
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iron(II) sulfate |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
iron(II) carbonate, or ferrous carbonate, is a chemical compound with formula FeCO
3, that occurs naturally as the mineral siderite. At ordinary ambient temperatures, it is a white ionic solid consisting or iron(II) cations Fe2+
and carbonate anions CO2−
3.
Ferrous carbonate can be prepared by reacting solution of the two ions, such as iron(II) chloride and sodium carbonate:
Ferrous carbonate can be prepared also from solutions of an iron(II) salt, such as iron(II) perchlorate, with sodium bicarbonate, releasing carbon dioxide:
Sel and others used this reaction (but with FeCl
2 instead of Fe(ClO
4)2) at 0.2 M to prepare amorphous FeCO
3.
Care must be taken to exclude oxygen O
2 from the solutions, because the Fe2+
ion is easily oxidized to Fe3+
, especially at pH above 6.0.
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