[{"from": "human", "value": "Could you provide a description of this molecule? [S-2].[S-2].[S-2].[S-2].[Fe+2].[Fe+3].[Fe+3]"}, {"from": "gpt", "value": "The molecule is a mineral with formula of Fe2+Fe3+2S4. The corresponding IMA (International Mineralogical Association) number is IMA1963-007. The IMA symbol is Grg."}]