selenium tellurium developed

Home > product >

selenium tellurium developed

selenium tellurium developed

  • Tellurium - Wikipedia

    OverviewApplicationsCharacteristicsHistoryProductionCompoundsBiological rolePrecautions

    The largest consumer of tellurium is metallurgy in iron, stainless steel, copper, and lead alloys. The addition to steel and copper produces an alloy more machinable than otherwise. It is alloyed into cast iron for promoting chill for spectroscopy, where the presence of electrically conductive free graphite tends to interfere with spark emission testing results. In lead, tellurium improves strength and durability, and decreases the corrosive action of sulfuric acid.

  • Wikipedia CC-BY-SA 许可下的文字
  • Selenium - Wikipedia

    Selenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic.It rarely occurs in its elemental state or as pure ore compounds in the Earth's crust.

  • Pronunciation: /sɪˈliːniəm/ ​(sə-LEE-nee-əm)
  • 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. We know its evolution in plants goes back a ...

  • Tellurium - an overview ScienceDirect Topics

    16.2 Occurrence of Selenium and Tellurium. Tellurium was discovered in 1782 by F. J. Müller von Reichenstein, and selenium was discovered in 1817 by J. J. Berzelius. Polonium was discovered in 1898 by Marie Curie, but of the nearly 30 known isotopes of polonium, none are stable so the element is of much less importance chemically.

  • Sulfur, Selenium, and Tellurium - PDF Free Download

    Sulfur, Selenium, and Tellurium 359 The selenium and tellurium compounds of nitrogen are much less numerous than the sulfur compounds. Selenium forms the compound Se4N4, but tellurium gives a compound that has a composition between Te3N4 and Te4N4. Both the selenium and tellurium compounds are dangerously explosive. A series of polymeric ...

  • Tellurium chemical element Britannica

    Tellurium (Te), semimetallic chemical element in the oxygen group (Group 16 [VIa] of the periodic table), closely allied with the element selenium in chemical and physical properties. Tellurium is a silvery white element with properties intermediate between those of metals and nonmetals; it makes up approximately one part per billion of Earth’s crust.

  • Selenium and tellurium chemistry: historical background

    1. Historical Background. The 3 rd Brazilian Meeting on the Chemistry of Selenium and Tellurium was held in Florianopolis, SC in 2010. These meetings began in 2006 as an initiative of the professors from the Universidade Federal de Santa Maria, RS, who dedicated their research efforts to selenium and tellurium chemistry.

  • 发布位置:Journal of the Brazilian Chemical Society 2010作者:Joao V Comasseto从属关系: University of Sao Paulo
  • 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 ...

  • Rarer than rare earths, the trials and tribulations of ...

    2014-09-23  Tellurium is a chemical element, with the symbol Te, and atomic number 52. In refined form it is a brittle, mildly toxic, rare, silver-white metalloid which looks similar to tin, tellurium is chemically related to selenium and sulfur. It is occasionally found in native form, as elemental crystals.

  • It's Elemental - The Element Selenium

    Selenium was discovered by Jöns Jacob Berzelius, a Swedish chemist, in 1817 after analyzing an impurity that was contaminating the sulfuric acid (H 2 SO 4) being produced at a particular factory in Sweden.Originally believing the material was tellurium, Berzelius eventually realized that it was actually a previously unknown element.Selenium occurs in minerals such as eucairite (CuAgSe ...

  • Sulfur, Selenium, and Tellurium - PDF Free Download

    Sulfur, Selenium, and Tellurium 359 The selenium and tellurium compounds of nitrogen are much less numerous than the sulfur compounds. Selenium forms the compound Se4N4, but tellurium gives a compound that has a composition between Te3N4 and Te4N4. Both the selenium and tellurium compounds are dangerously explosive. A series of polymeric ...

  • SELENIUM AND TELLURIUM

    selenium, 0.64 kg/mt copper for Canada and Chemical uses of selenium, including 0.215 kg/mt copper for the rest of the world. industrial, pharmaceutical, agricultural, and For tellurium, 0.065 kg/mt. World reserves for biological applications, accounted for 10% of selenium are 70,000 tons and resources are domestic usage. Dietary supplements for

  • SELENIUM AND TELLURIUM [ADVANCE RELEASE]

    Selenium and Tellurium—2016 [ adVanCe releaSe ] 65.1 Selenium and Tellurium By C. Schuyler anderson Domestic survey data and tables were prepared by Robin C. Kaiser, statistical assistant. In 2016, selenium and tellurium were not refined in the United States. Three copper refineries produced either

  • 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 ...

  • STDA---Selenium Tellurium Development Association -

    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.

  • Where did the name selenium come from - Answers

    2016-03-24  Selenium, Se (from Greek "σελήνη" , selene, meaning "Moon") was discovered in 1817 by Jöns Jakob Berzelius, who found the element associated with Te and S 1. Tellurium (from Latin tellus ...

  • Facts About Selenium Live Science

    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 ...

  • Tellurium - Element information, properties and uses ...

    Tellurium was discovered in 1783 by Franz Joseph Müller von Reichenstein at Sibiu, Romania. He became intrigued by ore from a mine near Zalatna which had a metallic sheen and which he suspected was native antimony or bismuth.

  • It's Elemental - The Element Tellurium

    Tellurium was discovered by Franz Joseph Müller von Reichenstein, a Romanian mining official, in 1782. Reichenstein was the chief inspector of all mines, smelters and saltworks in Transylvania. He also had an interest in chemistry and extracted a new metal from an ore of ...

  • Tellurium (Te) AMERICAN ELEMENTS

    The tellurium atom has a radius of 140.pm and its Van der Waals radius is 206.pm. Tellurium is most commonly sourced from the anode sludges produced as a byproduct of copper refining. Tellurium was first discovered by Franz Muller von Reichenstein in 1782. The name Tellurium originates from the Greek word 'Tellus' meaning Earth.

  • 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 ...

  • v116n6a16 Selenium minerals and the recovery of selenium ...

    tellurium, which had been discovered a few years earlier and named from the Latin word tellus (Earth). After the first observation of selenium in the laboratory, selenium received considerable interest. In 1954, E.P. Kaiser pointed out that Se is enriched in sulphide ores and often associated with Bi, Co, Sn etc. (Kaiser 1954). In 1959, Hawley and Nichol investigated selenium in Canadian ...

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

    From Selenium- to Tellurium-Based Glass Optical Fibers for Infrared Spectroscopies ... New glass compositions only based on tellurium were discovered [14–16]. For both selenide and telluride fibers, a crucial difficulty in the fabrication of this type of fiber is how to carefully control the impurity levels of the starting products as well as of the final fibers. In order to get a preform ...

  • (PDF) Selenium– and tellurium–halogen reagents

    Selenium and tellurium form binary halides in which the chalcogen can be in formal oxidation states (IV), (II) or (I). They are versatile reagents for the preparation of a wide range of inorganic ...

  • Engineering Lateral Heterojunction of Selenium‐Coated ...

    Herein, a core–shell tellurium–selenium (Te–Se) nanomaterial with polymer‐tailed and lateral heterojunction structures is developed as a photothermal absorber in a bionic solar‐evaporation system. It is further revealed that the amorphous Se shell surrounds the crystalline Te core, which not only protects the Te phase from oxidation ...

  • Where did the name selenium come from - Answers

    2016-03-24  Selenium, Se (from Greek "σελήνη" , selene, meaning "Moon") was discovered in 1817 by Jöns Jakob Berzelius, who found the element associated with Te and S 1. Tellurium (from Latin tellus ...

  • DETERMINATION OF SELENIUM AND TELLURIUM OXYANION

    was used as a reducing agent to convert soluble selenium and tellurium oxyanions to their elemental forms whose optical density was measured at 500 nm. Findings Specific growth rate and zone of inhibition experiments showed that tellurite was the most toxic among the selenium and tellurium oxyanions examined. Headspace

  • Selenium Pertaleme Wiki FANDOM powered by Wikia

    Selenium is one of the main characters of the Pertaleme series. Selenium is the twin brother of Tellurium. He is known for being the class' shy and soft-spoken artist who likes drawing sketch illustrations, relying on his sister for the coloring. Together, the two of them form an amazing...

  • Tellurium What is it, characteristics, history ...

    Tellurium is an element located within the group of semi-metals, with a shiny, crystalline, fragile appearance and a characteristic silvery white color. It is generally available as a dark grey powder. This is an element that has the properties of both, metals and non-metals. Tellurium forms many compounds corresponding to sulphur and selenium.

  • Selenium History - News-Medical.net

    2018-08-23  Selenium is a group 16 element with the atomic number 34. It is a metalloid, and shares several of its properties with oxygen and sulfur, which are the most well-known members of this group.

  • 1 2 3 4 5 ... 14