3D model (JSmol)
CompTox Dashboard (EPA)
FeC2O4 · 2 H2O (dihydrate)
|Molar mass||143.86 g/mol (anhydrous)|
179.89 g/mol (dihydrate)
|Melting point||dihydrate: 150–160 °C (302–320 °F; 423–433 K)|
0.097 g/100ml (25 °C)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
(what is ?)
Anhydrous iron(II) oxalate is as yet (2020) unknown among minerals. However, the dihydrate is known, as humboldtine. A related, though much more complex mineral is stepanovite,
Na[Mg(H2O)6] [Fe3+(C2O4)3]·3H2O - an example of trioxalatoferrate(III).