Cadmium

Cadmium is a chemical element with the Atomic Number 48 and the Symbol Cd, which is a soft, bluish-white, Transition Metal that is found in the D-block of the Periodic Table. It is a member of the Zinc Group and is similar to Mercury in its Chemical Properties. Nicolaus Kopernigk, a German Alchemist, is credited with the discovery of Cadmium in 1817, along with Friedrich Stromeyer and Carl Samuel Hermann. The discovery of Cadmium is also associated with the work of Sir Humphry Davy, a British Chemist, who first isolated the element using Electrolysis.

Introduction

Cadmium is a relatively rare element, making up about 0.1 parts per million of the Earth's Crust, and is often found in small amounts in Zinc Ores, such as Sphalerite and Wurtzite. The Mineralogy of Cadmium is closely related to that of Zinc and Lead, and it is often extracted as a byproduct of Zinc Mining operations, such as those found in Australia, China, and Peru. The Geology of Cadmium is also linked to the formation of Hydrothermal Veins, which are deposits of Minerals that form from Hot Water rich in Dissolved Minerals, such as those found in the Andes Mountain Range. Cadmium has been used in a variety of applications, including Batteries, Pigments, and Plating, due to its unique Physical Properties, such as its high Density and Corrosion Resistance, which make it useful in Aerospace Engineering and Nuclear Reactors.

Properties

Cadmium has a number of distinct Physical Properties, including a high Melting Point of 321°C and a Boiling Point of 767°C, which make it useful in high-temperature applications, such as Heat Exchangers and Thermocouples. It is also a good Conductor of Electricity and has a high Thermal Conductivity, which makes it useful in Electrical Engineering and Thermal Management applications, such as those found in NASA's Space Shuttle program. The Chemical Properties of Cadmium are also of interest, as it is highly reactive and can form a number of compounds, including Cadmium Oxide, Cadmium Sulfide, and Cadmium Chloride, which are used in Catalysis and Pharmaceuticals. Cadmium is also highly Toxic and can be harmful to humans and the environment, as noted by the World Health Organization and the Environmental Protection Agency.

Occurrence

Cadmium is found in a number of different Minerals, including Greenockite and Hawleyite, which are Sulfide Minerals that are often found in Hydrothermal Veins. It is also found in small amounts in Zinc Ores, such as Sphalerite and Wurtzite, which are Sulfide Minerals that are often found in Sedimentary Rocks. The Geology of Cadmium is closely related to the formation of Volcanic Rocks, such as Basalt and Andesite, which are Igneous Rocks that are formed from the cooling and solidification of Magma. Cadmium is also found in small amounts in Coal and Oil Shale, which are Sedimentary Rocks that are formed from the remains of Plants and Animals. The United States Geological Survey and the British Geological Survey have conducted extensive research on the Geology of Cadmium.

Production

The Production of Cadmium is closely tied to the Production of Zinc, as it is often extracted as a byproduct of Zinc Mining operations. The Mining of Cadmium is typically done using Underground Mining techniques, such as Room and Pillar Mining and Sublevel Caving, which are used to extract Ore from Underground Deposits. The Refining of Cadmium is typically done using Electrolysis, which involves the use of an Electric Current to extract the Metal from the Ore. The Production of Cadmium is also closely tied to the Production of Lead and Copper, as these Metals are often found together in the same Ore Deposits. The International Council on Mining and Metals and the World Gold Council have established guidelines for the responsible Production of Cadmium.

Applications

Cadmium has a number of different Applications, including Batteries, Pigments, and Plating. It is often used in Nickel-Cadmium Batteries, which are Rechargeable Batteries that are used in a variety of applications, including Electric Vehicles and Renewable Energy Systems. Cadmium is also used in Pigments, such as Cadmium Sulfide and Cadmium Selenide, which are used in Art and Design. The Plating of Cadmium is also used to protect Metals from Corrosion, as it forms a thin layer of Oxide that prevents the Metal from reacting with the environment. Cadmium is also used in Nuclear Reactors, such as those found in Fukushima Daiichi Nuclear Power Plant and Chernobyl Nuclear Power Plant, due to its high Neutron Absorption Cross Section. The European Space Agency and the National Aeronautics and Space Administration have used Cadmium in various Space Exploration missions.

Toxicity

Cadmium is highly Toxic and can be harmful to humans and the environment. The Toxicity of Cadmium is due to its ability to accumulate in the body and cause damage to the Kidneys and Bones. Cadmium is also a known Carcinogen, and exposure to it has been linked to an increased risk of Cancer. The Environmental Protection Agency and the World Health Organization have established guidelines for the safe handling and disposal of Cadmium. The Occupational Safety and Health Administration and the National Institute for Occupational Safety and Health have also established guidelines for workers who handle Cadmium in various industries, including Manufacturing and Construction. Cadmium has been the subject of extensive research by Scientists, including Marie Curie and Linus Pauling, who have studied its Chemical Properties and Toxicity. Category:Chemical Elements