[{"from": "human", "value": "Could you provide a description of this molecule? [C][=Branch1][C][=O][Branch1][C][O-1][O-1].[C][=Branch1][C][=O][Branch1][C][O-1][O-1].[Mg+2].[Ca+2]"}, {"from": "gpt", "value": "The molecule is a mineral with formula of CaMg(CO3)2. The corresponding IMA (International Mineralogical Association) number is  . The IMA symbol is Dol."}]