[{"from": "human", "value": "What can you tell me about this molecule? [S].[S].[S].[S].[Fe].[Cu].[Cu].[Sn]"}, {"from": "gpt", "value": "The molecule is a mineral with formula of Cu1+2Fe2+Sn4+S2-4 or Cu2FeSnS4. The corresponding IMA (International Mineralogical Association) number is  . The IMA symbol is Stn."}]