[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a mineral with formula of Fe3+2O3 or Fe2O3. The corresponding IMA (International Mineralogical Association) number is  . The IMA symbol is Hem."}, {"from": "gpt", "value": "[O-2].[O-2].[O-2].[Fe+3].[Fe+3]"}]