[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a mineral with formula of Ca10Si18O46\u00b718H2O. The corresponding IMA (International Mineralogical Association) number is  . The IMA symbol is Oke."}, {"from": "gpt", "value": "[O-1][Si][=Branch1][C][=O][O-1].[Ca+2]"}]