[{"from": "human", "value": "Provide a brief overview of this molecule. [O-2].[O][=Al][O][Al][=O].[O][=Si][=O].[K+1].[K+1]"}, {"from": "gpt", "value": "The molecule are the two major micas of commerce. Micas are commonly found in ordinary rocks. Inhalation of mica dust presents an occupational hazard."}]