However, magnetite can have toxic effects due to its charge or magnetic nature and its involvement in oxidative stress or the production of free radicals. Potentially a human health hazard, airborne magnetite is a result of pollution (specifically combustion).

Magnetite is a common natural phase, occurring in various geological environments, ranging from igneous (e.g., layered ultrabasic rocks, basalts) to sedimentary (e.g., banded iron formations, beach sands) rocks, and to high-grade metamorphic rocks (e.g., schists, skarns), where it can be produced through a multitude of …

What is Magnetite? Magnetite is a very common iron oxide (Fe3O4) mineral that is found in igneous, metamorphic, and sedimentary rocks. It is the most commonly mined ore of iron.

13.3. Magnetite, (Fe3O4) takes a long time to form, in the range of months to years. Magnetite shavings will be hard, brittle and magnetic.

Magnetite is in the hexoctahedral crystal class; in the 3-D crystal structure, the purple atoms are iron, and the red atoms are oxygen. Magnetite’s greatest use is as an important iron ore for steel manufacture.

Magnetite is strongly magnetic. It was used by the ancient Chinese to make the first magnetic compasses. The chemical formula is Fe3O4, commonly called ferrous-ferric oxide, and is valuable as an iron ore. Magnetite reacts with oxygen to produce hematite, another iron ore.

Each group needs:

1. nail, 3-inch (7.6 cm) or longer (made of zinc, iron or steel, but not aluminum)
2. 2 feet (. 6 m) insulated copper wire (at least AWG 22 or higher)
3. D-cell battery.
4. several metal paperclips, tacks or pins.
5. wide rubber band.
6. Building an Electromagnet Worksheet.

Magnets are only attracted to special metals. Iron, cobalt and nickel are magnetic. Metals that have iron in them attract magnets well. Steel is one.

What are 4 Ways to Make an Electromagnet Stronger?

• Increase more number of turns to the coil.
• Increase the flow of current through the coil.
• Wrap the coil around the iron piece.
• Increase in current or voltage.

Use a pair of wire strippers to remove a few centimeters of insulation from each end of the wire. Neatly wrap the wire around the nail. The more wire you wrap around the nail, the stronger your electromagnet will be. Make certain that you leave enough of the wire unwound so that you can attach the battery.

Electromagnets are found in doorbells, hard drives, speakers, MagLev trains, anti-shoplifting systems, MRI machines, microphones, home security systems, VCRs, tape decks, motors, and many other everyday objects.

You can get electromagnets at cheaper rates than the permanent magnets. This is because the cost of materials used in the electromagnet is lesser. You can alter the magnetic strength of an Electromagnet according to your need. This is not possible in case of a permanent magnet.

Use of magnet:

• Magnets are used in magnetic compass, doorbells, refrigerators.
• Magnets are used in dynamos, motors, loudspeakers, microphones etc.
• Ceramic magnets are used in computers.
• Magnets are used in toys to give a magic effect.

Magnets don’t have to be iron or even metal: Most of the magnets we use are made of iron (like fridge magnets). Magnets can be made of any material with unpaired electrons. That includes many metals and alloys, such as neodymium, which is used in disk drives.

Who invented magnets? The first magnets were not invented, but rather were found from a naturally occurring mineral called magnetite. Traditionally, the ancient Greeks were the discoverers of magnetite. There is a story about a shepherd named Magnes whose shoe nails stuck to a rock containing magnetite.