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Selenium tellurium developed

  • Selenium - Element information, properties and uses

    It was Berzelius who discovered selenium in 1817, as an impurity in sulphuric acid. Tellurium had already been discovered, and named after the Greek word for earth, so he named selenium using the Greek word for moon, selene. It occurs in various minerals, together with sulphur as you would expect.

  • Mineral Resource of the Month: Selenium - EARTH Magazine

    Jan 27, 2015· Selenium was named for the Greek word selene, meaning moon, because of its chemical similarity to tellurium, which had been discovered a few years earlier and named for the Latin word tellus, meaning Earth. Alexander Graham Bell used selenium to produce the photophone in 1879, which transmitted speech patterns on a beam of light.

  • From Selenium- to Tellurium-Based Glass Optical Fibers for

    Fibers enabling to observe the CO2 absorption band spreading around 15 µm should be developed. Tellurium-based glasses, due to their atoms heaviness, can transmit light further in the infrared region up to 28 µm [14]. Therefore, the telluride glass family has been revisited for the DARWIN mission led by the European Space Agency (ESA).

  • Selenium, Tellurium and Polonium - ScienceDirect

    Jan 01, 1997· Selenium and tellurium are rare elements, being 66th and 73rd, respectively, in order of crustal abundance. However, polonium, on account of its radioactive decay, is less abundant. The main source of selenium and tellurium is the anode slime deposited during the electrolytic refining of copper. Selenium is also recovered from the sludge

  • Selenium, Tellurium and Polonium - ScienceDirect

    Jan 01, 1997· Selenium and tellurium are rare elements, being 66th and 73rd, respectively, in order of crustal abundance. However, polonium, on account of its radioactive decay, is less abundant. The main source of selenium and tellurium is the anode slime deposited during the electrolytic refining of copper.

  • ChemInform Abstract: Compounds of Selenium and Tellurium

    In the last three decades the field of the traditionally more exotic selenium nitrogen and tellurium nitrogen compounds has developed considerably. This

  • Selenium-Tellurium Development Association Inc - GuideStar

    a: Maintain a website containing information on the organization and recent publications concerning selenium and tellurium. b: Be a clearinghouse for research, environmental or medical information concerning selenium and tellurium. c: Sponsor basic research in improving and increasing the use of selenium and tellurium in photovoltaic applications (solar panels).

  • Selenium stories Nature Chemistry

    Jun 23, 2011· Selenium is a semi-metallic element that belongs to the family of chalcogens (group 15). Placed just between sulfur and tellurium in that column of the periodic table, it resembles both elements

  • Selenium Metallicum 30c Uses, Benefits - Selenium

    May 06, 2020· Introduction and History: Selenium was discovered in 1818 by Berzelius, and it was named by him after the moon because it is found associated with Tellurium (Tellus the earth). Preparation: Triturations are prepared from the element with sugar of milk, from which higher potencies are prepared. Constitution and Physiognomy: It is adapted to people with

  • Web - STDA

    Welcome to Selenium Tellurium Development Association The unique properties of selenium and tellurium and their compounds have led to these elements being used in an ever changing number of applications over the years in which they have been commercially available.

  • Selenium and Tellurium Statistics and Information

    Selenium and Tellurium Statistics and Information Commercial quantities of selenium are recovered as a byproduct of the electrolytic refining of copper where it accumulates in anode residues. Growth in consumption was driven by the development of new uses, including applications in rubber compounding, steel alloying, and selenium rectifiers.

  • Developing a Method for Determining the Mass Balance of

    tellurium that was bioreduced when a selenium-resistant facultative anaerobe was amended with either selenium or tellurium; and (2) methods to analyze for these metalloids in biological samples. Methods Analytical methods were developed for the determination of selenium and tellurium in biological samples by hydride generation-atomic absorption.

  • 9.1: The Group 16 Elements- The Chalcogens - Chemistry

    Sep 08, 2020· The element was discovered in 1817 by Berzelius (Figure 9.1. 15), who found the element associated with tellurium. It was discovered as a byproduct of sulfuric acid production. Figure 9.1. 15: Swedish chemist Jöns Jacob Berzelius (1779 - 1848).

  • Selenium Telluride AMERICAN ELEMENTS

    The number of electrons in each of tellurium's shells is 2, 8, 18, 18, 6 and its electron configuration is [Kr] 4d 10 5s 2 5p 4. Tellurium was discovered by Franz Muller von Reichenstein in 1782 and first isolated by Martin Heinrich Klaproth in 1798. In its elemental form, tellurium has a silvery lustrous gray appearance.

  • Determination of Selenium and Tellurium in Basalt Rock

    Jun 01, 2009· Promising methods have been developed recently for the determination of selenium (Se) and tellurium (Te) in geological materials at ng g 1 and lower levels, using hydride generationinductively coupled plasmamass spectrometry. Here we report on a new isotope dilutionhydride generationinductively coupled plasmamass spectrometry

  • Selenium: Contrary Stuff ETF

    The metal was discovered in 1817 (35 years after tellurium) by the Swedish chemistry professors J. J. Berzelius and J G Gahn. Source: Selenium-Tellurium Development Association

  • The Discovery of Selenium Selen 2017

    Klaproth had assigned tellurium (Latin: tellus, earth) to Müller von Rechensteins new element in 1784. Berzelius chose the name selenium (Greek: selene, moon) for the new element, noting its resemblance to tellurium. From Berzelius Discovery of Selenium

  • Facts About Selenium Live Science

    Nov 29, 2016· Berzelius discovered selenium after analyzing an impurity in sulfuric acid being produced at a factory in Sweden. He thought it was tellurium at first, and then realized it was unknown element

  • Selenium - Element information, properties and uses

    It was Berzelius who discovered selenium in 1817, as an impurity in sulphuric acid. Tellurium had already been discovered, and named after the Greek word for earth, so he named selenium using the Greek word for moon, selene. It occurs in various minerals, together with sulphur as

  • DETERMINATION OF SELENIUM AND TELLURIUM

    Selenium and tellurium in the environment and their speciation are major research to the discussion of the antagonistic activities developed by different organisms to overcome the problems caused by these elements. Introduction to Selenium Selenium (Se) was discovered and named by Jöns Jacob Berzelius in the year


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