Demagnetisation of iron. Image 3 of 3. Iron sulphide being tested for magnetism with a bar magnet. The iron sulphide is not magnetic. Metallic iron is magnetic, and is attracted to a magnet. When iron is reacted with sulphur, as it has been here, the resulting compound does not retain the magnetism of the iron. See images A230/083-085 for a sequence showing the iron being demagnetised by a reaction with sulphur.
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