[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a mineral with formula of Fe2+Al2O4. The corresponding IMA (International Mineralogical Association) number is  . The IMA symbol is Hc."}, {"from": "gpt", "value": "[O-1][Al][=O].[O-1][Al][=O].[Fe+2]"}]