Mineralogy
Magnetism

Magnetic fields are created by charged particles in motion.

The extent of magnetism that a mineral displays is controlled by the atomic properties of certain elements and the pairing status of electrons.

Because unpaired electrons are common in the transition metals, and transition metals are common constituents of minerals, these elements are often responsible for magnetism in minerals.


Some terms & definitions:

  1. Paramagnetism: Paramagnetic minerals become slightly magnetic when an external magnetic field is applied, but lose this magnetism when the field is removed.

  2. Ferromagnetism: Ferromagnetic minerals become magnetic when an external magnetic field is applied, and can RETAIN this magnetism when the field is removed.

  3. Ferrimagnetism: antiparallel magnetic moments that are non-equal, result in a net magnetic moment - permanent magnetic domains

  4. Diamagnetism: no magnetic behavior at all


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