Where is chromium found in the world

Without chromium, emeralds would not be green and rubies would not be red. Trivalent chromium Cr III is an important micronutrient and improves the efficiency of insulin in individuals with impaired glucose tolerance. Meats, vegetables, fruits and grains are metabolic sources of chromium.

Visit minerals. All rights reserved. While China is the leading chromium-consuming country and the leading stainless steel producer, it is not a large producer of chromite ore.

The mining method used for extracting chromite depends greatly on the characteristics of the deposit. These characteristics include whether it is stratiform or podiform, high grade or low grade, subsurface or near surface, or massive or disseminated. Because surface mining typically is less expensive than underground mining, it is preferred, but not always possible. Like mining, beneficiation processing, crushing, separating, smelting, refining, etc.

When combined with other elements, chromium makes vibrant colors and is used as a dye, which is what originally earned it its name from the Greek word chroma for "color. It is naturally found in compounds in the earth's crust.

However, consuming high levels of chromium in polluted drinking water or inhaling fumes of the heated element can cause ulcers, cancer and other health problems. French chemist Louis Nicolas Vauquelin first isolated chromium from a bright red mineral called Siberian red lead, now known as lead chromate PbCrO 4 in He mixed the chromium in a variety of solutions and was intrigued by the many colors it produced, thereby naming the element after the Greek word chroma meaning "color.

Chromium is the 21st most common element found in the Earth's crust, but it is not found in its free metal form. Instead, it is principally found in chromite ore, according to Robert E. About 20, tons of chromium metal are produced each year, and there are still about a billion tons of unexploited deposits in Greenland, Canada, and the United States, according to Emsley. Chromium metal is then obtained by heating the chromite ore in the presence of aluminum or silicon, according to the Jefferson Lab.

Chromium is a transition metal in Group 6 on the Periodic Table of Elements. This is calculated by combining the scores for crustal abundance, reserve distribution, production concentration, substitutability, recycling rate and political stability scores.

The percentage of a commodity which is recycled. A higher recycling rate may reduce risk to supply. The availability of suitable substitutes for a given commodity. The percentage of an element produced in the top producing country. The higher the value, the larger risk there is to supply. The percentage of the world reserves located in the country with the largest reserves.

A percentile rank for the political stability of the top producing country, derived from World Bank governance indicators. A percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators.

Specific heat capacity is the amount of energy needed to change the temperature of a kilogram of a substance by 1 K. A measure of the stiffness of a substance. It provides a measure of how difficult it is to extend a material, with a value given by the ratio of tensile strength to tensile strain.

A measure of how difficult it is to deform a material. It is given by the ratio of the shear stress to the shear strain. A measure of how difficult it is to compress a substance. It is given by the ratio of the pressure on a body to the fractional decrease in volume. A measure of the propensity of a substance to evaporate. It is defined as the equilibrium pressure exerted by the gas produced above a substance in a closed system. This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site.

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Jump to main content. Periodic Table. Glossary Allotropes Some elements exist in several different structural forms, called allotropes. Discovery date Discovered by Nicholas Louis Vauquelin Origin of the name The name is derived from the Greek 'chroma', meaning colour. Glossary Group A vertical column in the periodic table. Fact box. Glossary Image explanation Murray Robertson is the artist behind the images which make up Visual Elements.

Appearance The description of the element in its natural form. Biological role The role of the element in humans, animals and plants. Natural abundance Where the element is most commonly found in nature, and how it is sourced commercially. Uses and properties.

Image explanation. Chromium plating can be used to give a polished mirror finish to steel. Chromium-plated car and lorry parts, such as bumpers, were once very common. It is also possible to chromium plate plastics, which are often used in bathroom fittings. However, the waste effluent is toxic so alternatives are being investigated. Chromium compounds are used as industrial catalysts and pigments in bright green, yellow, red and orange colours.

Rubies get their red colour from chromium, and glass treated with chromium has an emerald green colour. Biological role. Chromium is an essential trace element for humans because it helps us to use glucose. However, it is poisonous in excess. We take in about 1 milligram a day. Natural abundance. Chromium is found mainly in chromite. Chromium metal is usually produced by reducing chromite with carbon in an electric-arc furnace, or reducing chromium III oxide with aluminium or silicon. Help text not available for this section currently.

Elements and Periodic Table History.