Cobalt

Cobalt is a hard, gray metal.

It can make things look bright blue. This metal is used to color glass and paint.

Long ago, miners called it "goblin ore." They thought mine spirits lived in it.

These ores gave off bad fumes.

Today, we use cobalt in many ways. It is used to make batteries. It also helps make strong metal tools.

Cobalt is even in our bodies. It is part of a vitamin for animals. This vitamin helps animals stay healthy.

It is a very useful metal.

Cobalt is a hard, gray metal.

It is often found mixed with other metals. Scientists get pure cobalt through a way called smelting.

Long ago, miners called this ore "kobold ore." This name comes from German words for a goblin. Miners thought spirits lived in the rocks. These ores were hard to use. They gave off poisonous fumes when heated.

Today, cobalt is very important. We use it to make lithium-ion batteries. These batteries power many things. Cobalt also helps make strong metal alloys. These are mixtures of metals that resist wear.

Cobalt can also make beautiful colors. It gives a deep blue tint to glass and paint. This is often called cobalt blue.

Even living things need cobalt. It is part of Vitamin B12. This is an essential vitamin for all animals. Without it, animals cannot stay healthy. Cobalt is also helpful for bacteria and algae. It is a tiny but vital part of life.

Cobalt is a hard and shiny gray metal.

It is a chemical element with the symbol Co. It also has the atomic number 27. This metal is very important for our modern world. We use it to make many different things. It helps create strong materials and even powers our gadgets.

Without it, many technologies would not work the same way.

There are many ways that cobalt works in science. One way is by adding color to things. Cobalt compounds like cobalt blue give a deep blue tint to glass and ceramics. You can also find this blue color in paints and inks. Another way it works is in batteries. Cobalt is a key part of lithium-ion batteries. It is also used to make alloys that are very strong. These metal mixtures can resist wear and tear very well.

Cobalt even helps clean oil by acting as a catalyst.

History tells us that people have used cobalt for a long time. People used cobalt blue pigments for jewelry and paints in antiquity.

Long ago, German silver miners had a hard time with it. They called the ore "kobold ore." This name comes from the German word for a goblin or spirit. Miners thought these spirits were responsible for the ore. The ore was difficult because it released poisonous fumes when heated. In 1735, scientists found that these ores could be turned into a new metal.

Today, most cobalt comes from mining other metals. It is often a by-product of mining copper and nickel.

A huge amount of the world's cobalt comes from the Copperbelt. This area is in the Democratic Republic of the Congo and Zambia. In 2024, global production was more than 300,000 tons. The Democratic Republic of the Congo produced more than 80% of that amount.

This shows how much the world relies on certain places for this metal.

Cobalt is also a part of life itself. It is the active center of something called cobalamins. The most famous example is Vitamin B12.

This is an essential vitamin for all animals to stay healthy. Cobalt is also a tiny nutrient for things like bacteria and algae. It is amazing that a hard metal can be so important for living things. From tiny bacteria to big machines, cobalt plays a huge role everywhere.

Cobalt is a chemical element with the symbol Co and atomic number 27. It is a hard, lustrous, and somewhat brittle gray metal.

In nature, cobalt is rarely found as a pure metal. Instead, it usually exists in the Earth's crust in a chemically combined form. It can sometimes be found in small amounts within alloys of natural meteoric iron. Cobalt is a ferromagnetic metal, which means it can be magnetized. It also has a specific gravity of 8.9. This element is essential to modern technology, biology, and industry.

The chemical properties of cobalt allow it to act in many different ways. It is a weakly reducing metal. This means it is protected from oxidation by a thin, passivating oxide film. However, it can be attacked by halogens and sulfur. When heated in oxygen, it produces cobalt(IV) oxide, known as Co3O4. This substance can lose oxygen at high temperatures to become cobalt monoxide, or CoO. Cobalt also reacts with several other elements. It reacts with fluorine at 520 K to create cobalt(III) fluoride. It also reacts with chlorine, bromine, and iodine to produce binary halides. Interestingly, it does not react with hydrogen or nitrogen gas, even when those gases are heated.

Cobalt exists in several different chemical forms and oxidation states. Common oxidation states for cobalt include +2 and +3. Many simple compounds use the +2 state, known as cobalt(II). These salts often form a pink-colored metal aquo complex when they are in water. If you add chloride to this solution, it turns into an intense blue color. Cobalt also forms various oxides. Cobalt(II) oxide is green and has a rocksalt structure. At temperatures between 600 and 700 °C, it oxidizes into the blue cobalt(II,III) oxide. Cobalt can also form complex coordination compounds. The chemist Alfred Werner won a Nobel Prize for his extensive work on these complex structures.

History shows that humans have interacted with cobalt for thousands of years. Since antiquity, cobalt-based blue pigments have been used for paints and jewelry.

These pigments also provide a distinctive blue tint to glass. For a long time, people mistakenly believed the blue color came from the metal bismuth. The name "cobalt" itself has a mysterious history tied to 16th-century German silver miners. They called certain ores "kobold ore," which means "goblin ore" in German. Miners believed these ores were caused by mischievous spirits or gnomes. These ores were a nuisance because they were poor in useful metals. They also released poisonous, arsenic-containing fumes when they were smelted. In 1735, scientists discovered that these ores could be reduced to a new metal. This was the first new metal discovered since ancient times.

Today, cobalt production is a massive global industry. It is mostly produced as a by-product of mining for copper and nickel. It can also be extracted from metallic-lustered ores like cobaltite. The Copperbelt region, located in the Democratic Republic of the Congo (DRC) and Zambia, produces most of the world's cobalt.

In 2016, the DRC alone accounted for more than 50% of global production. By 2024, total world production exceeded 300,000 tons. During that same year, the DRC accounted for more than 80% of the total supply.

Cobalt has many vital uses in our modern world. It is a primary component in lithium-ion batteries. It is also used to manufacture high-strength, wear-resistant, and magnetic alloys.

In the petroleum industry, cobalt acts as a catalyst. It is used to refine crude oil by purging it of sulfur. Removing sulfur is important because sulfur is a major pollutant that causes acid rain when burned. Cobalt is also used in the form of radioisotopes. Cobalt-60 is a commercially important radioisotope. It is used as a radioactive tracer and to produce high-energy gamma rays.

Beyond machines and industry, cobalt is essential for life. It is the active center of a group of coenzymes called cobalamins. The most famous example is Vitamin B12, which is an essential vitamin for all animals.

Even in its inorganic form, cobalt serves as a micronutrient for fungi, algae, and bacteria. This shows how a heavy metal can be deeply connected to the biological systems of living things. From the tiny cells of a bacterium to the massive batteries in electric vehicles, cobalt plays a central role in our planet's systems.