* Iron(II) sulfate heptahydrate (FeSO₄·7H₂O): This is a common compound often used as a dietary supplement.
* Iron(III) sulfate (Fe₂(SO₄)₃): This is used in various industrial processes.
* Iron(II) sulfide (FeS): This is a naturally occurring mineral.
* Iron(III) oxide-hydroxide sulfate (FeO(OH)SO₄): This is a mineral found in some rocks and soils.
To give you a more specific answer, I need more information about the compound. Could you tell me:
* What is the color of the compound?
* What is the physical state of the compound (solid, liquid, gas)?
* What are the relative amounts of iron, sulfur, and oxygen in the compound?
With more details, I can help you pinpoint the specific compound you are looking for.