[{"from": "human", "value": "Provide a brief overview of this molecule. [Al+3].[Al+3].[S-2].[S-2].[S-2]"}, {"from": "gpt", "value": "The molecule is a sulfide of aluminum. Aluminum is the most abundant metal in the earth's crust and is always found combined with other elements such as oxygen, silicon, and fluorine.  (L739, L740)"}]