Potassium dithioferrate is the
inorganic compound with the formula KFeS
2. It is a purple solid that is insoluble in water. Regarding its chemical structure, the compound consists of infinite chains of edge-shared anionic FeS
4 tetrahedra. Associated with these chains are potassium ions. A related family of one-dimensional materials with the formula MFe
2S
3 (M = K, Rb, Cs). These
mixed-valence compound
Mixed valence complexes contain an element which is present in more than one oxidation state. Well-known mixed valence compounds include the Creutz–Taube complex, Prussian blue, and molybdenum blue. Many solids are mixed-valency including ...
s are represented by the mineral rasvumite.
The compound is prepared by heating
iron
Iron () is a chemical element with Symbol (chemistry), symbol Fe (from la, Wikt:ferrum, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 element, group 8 of the periodic table. It is, Abundanc ...
powder,
sulfur, and
potassium carbonate
Potassium carbonate is the inorganic compound with the formula K2 CO3. It is a white salt, which is soluble in water. It is deliquescent, often appearing as a damp or wet solid. Potassium carbonate is mainly used in the production of soap and gl ...
at 900 °C. According to the idealized stoichiometry, this reaction is proposed to cogenerate potassium sulfate:
:6Fe + 13S + 4K
2CO
3 → 6KFeS
2 + K
2SO
4 + 4{{nbspCO
2
References
Iron compounds
Sulfides
Thiometallates