[{"from": "human", "value": "Provide a description of this molecule. [O].[O-1][Si][Branch1][C][O-1][Branch1][C][O-1][O-1].[O-1][Si][Branch1][C][O-1][Branch1][C][O-1][O-1].[O-1][Si][Branch1][C][O-1][Branch1][C][O-1][O-1].[Al+3].[Al+3].[Ca+2].[Ca+2].[Fe+2]"}, {"from": "gpt", "value": "The molecule is a mineral with formula of Ca2Fe3+Al2(Si2O7)(SiO4)O(OH) or Ca2(Al2Fe3+)[Si2O7][SiO4]O(OH). The corresponding IMA (International Mineralogical Association) number is  . The IMA symbol is Ep."}]