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Magnesium sulfide

physical science Maturity 11-13 Next article →

Magnesium sulfide is a special inorganic compound. Its chemical formula is MgS. You might see it as a white crystalline material. Often, it appears as a brown, non-crystalline powder instead. This material is very useful in many industries. It helps us make strong metals like iron.

There are a few ways this substance forms. It can be made by reacting magnesium with sulfur. It also forms when magnesium reacts with hydrogen sulfide. In a lab, scientists use molecular beam epitaxy to make it. This process creates specific shapes called zinc blende or wurtzite. Its most stable form has a rock salt structure.

People have studied this material for a long time. In 1916, E. Tiede wrote about its properties. He looked at its phosphorescence, which is a type of glow. This material is also a wide band-gap direct semiconductor. This means it can help control electricity. It can even act as a blue-green light emitter.

Magnesium sulfide plays a big role in making steel. In the BOS steelmaking process, sulfur must be removed first. Workers use a lance to add magnesium powder to hot iron. This creates magnesium sulfide in the molten metal. The new material floats on top of the liquid iron. Then, workers can easily remove it from the batch.

This material is also found in the far reaches of space. It is a part of a mineral called niningerite. You can find niningerite inside some meteorites. It is also found near certain evolved carbon stars. These stars have a specific carbon to oxygen ratio. MgS can also be found in some slags.

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