[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a mineral with formula of Mg2Al3(AlSi5)O18 or Mg2Al4Si5O18. The corresponding IMA (International Mineralogical Association) number is  . The IMA symbol is Crd."}, {"from": "gpt", "value": "[O-1][Si][O][Al][Branch2][Ring2][=Branch1][O][Al][Branch1][Ring2][O][Ring1][=Branch1][O][Si][Branch1][C][O-1][Branch1][C][O-1][O][Al][O][Al][O][Si][=Branch1][C][=O][O][Si][Branch1][Ring2][O][Ring1][#Branch1][Branch1][Ring2][O][Ring1][#Branch2][O-1][O][Si][=Branch1][C][=O][O][Ring2][Ring1][#Branch2].[Mg+2].[Mg+2]"}]