One of the most interesting crystals: have deep green color, beautiful highly symmetric shape and stable on air. Unfortunately, I was not able to prepare aluminium analog: Na and K alumooxalates just crystallized separtely.
- Potassium tris(oxalato) ferrate (III): pure K salt
- Sodium tris(oxalato) ferrate (III): pure Na salt
- Sodium tris(oxalato) aluminate: Al analog