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Thallium - Element information, properties and uses ...

In particular, the conductivity of thallium sulphide alters on exposure to infrared light, making it an important compound in photocells. Thallium bromide-iodide crystals have also been used in infrared detectors. The addition of metals like thallium to glass can also reduce its melting point to as low as 150 degrees centigrade.

Acute Tellurium Toxicity From Ingestion of Metal-Oxidizing ...

Tellurium is an element used in the vulcanization of rubber and in metal-oxidizing solutions to blacken or tarnish metals. Descriptions of human toxicity from tellurium ingestion are rare. We report the clinical course of 2 children who ingested metal-oxidizing solutions containing substantial concentrations of tellurium. Clinical features included vomiting, black discoloration of the oral ...

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Thallium - Wikipedia

Thallium is a chemical element with the symbol Tl and atomic number 81. It is a gray post-transition metal that is not found free in nature. When isolated, thallium resembles tin, but discolors when exposed to air.Chemists William Crookes and Claude-Auguste Lamy discovered thallium independently in 1861, in residues of sulfuric acid production. Both used the newly developed method of flame ...

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Thallium Element Facts - chemicool.com

Thallium Telluride (Tl 2 Te) is a crystal grown product generally immediately available in most volumes. Technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

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Tellurium - Element information, properties and uses ...

Tellurium is present in the Earth's crust only in about 0.001 parts per million. Tellurium minerals include calaverite, sylvanite and tellurite. It is also found uncombined in nature, but only very rarely. It is obtained commercially from the anode muds produced during the electrolytic refining of copper. These contain up to about 8% tellurium.

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Tellurium - Wikipedia. Tellurium is a chemical element with symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid.Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens.It is occasionally found in native form as elemental crystals.

Thallium - United States Court of Appeals for the Ninth ...

Thallium is found in the minerals crookesite TlCu7Se4, hutchinsonite TlPbAs5S9, and lorandite TlAsS2.[23] Thallium also occurs as a trace element in iron pyrite, and thallium is extracted as a by-product of roasting this mineral for the production of sulfuric acid.[2][24] Thallium can also be obtained from the smelting of lead and zinc ores.

FIRST SCHEDULE (REGULATION 2) CODE DESCRIPTION SW 1 …

antimony, tellurium, thallium or selenium excluding slag from iron and steel factory SW 105 . Galvanic sludges : SW 106 . Residues from recovery of acid pickling liquor : SW 107 . Slags from copper processing for further processing or refining containing arsenic, lead or cadmium SW 108 : Leaching residues from zinc processing in dust and ...

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Tellurium (Te) | AMERICAN ELEMENTS

Tellurium is a p-type semiconductor, and shows greater conductivity in certain directions, depending on alignment of the atoms. Many tellurium compounds exhibit photoconductivity--their conductivity increases slightly with exposure to light--which makes many tellurides candidates for …

Thallium Element Facts - chemicool.com

Thallium can also be obtained from the smelting of lead and zinc ores. Isotopes: Thallium has 31 isotopes whose half-lives are known, with mass numbers from 179 to 210. Naturally occurring thallium is a mixture of its two stable isotopes, 203 Tl and 205 Tl with natural abundances of …

Tellurium (UK PID) - inchem.org

EPIDEMIOLOGY Tellurium is used as an additive in many metallurgical processes such that it is often involved in multiple metal exposures, notably with lead, zinc, arsenic, selenium, cadmium and thallium. Tellurium exposure also occurs during electrolytic copper refining where tellurium …

What describes the element tellurium? - Answers.com

Tellurium is a metalloid chemical element which is used in a variety of industries, primarily in the form of an additive to an assortment of compounds and alloys.

EP0799161B1 - Process for treating waste water containing ...

The invention concerns a process for treating thalium-containing waste water produced in particular in the oxidation leaching of the fine dusts produced in the metallurgical processing of sulphide ores, and also containing several other metals such as zinc, lead, cadmium, copper, arsenic, selenium and tellurium. The process involves the addition to the effluent of a solution of alkali ...

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Thallium Poisoning | California Poison Control System | UCSF

Thallium Poisoning. Sun Sep 23, 2007. By Cyrus Rangan, MD. Introduction. Thallium was accidentally discovered in 1861 by Sir William Crookes, who noted an unexpected green banding on colorimetric spectroscopy, while researching tellurium ore (Greek, thallos: "green young shoot"). Thallium is a metal with a storied history of medicinal and ...

Tellurium - Wikipedia

Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally found in native form as elemental crystals.

Tellurium - Wikipedia

Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid.Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens.It is occasionally found in native form as elemental crystals.

Colic induced by lead - PubMed Central (PMC)

Jun 15, 2010· Because of the patient's occupation, urine was screened for toxic metals (antimony, arsenic, bismuth, cadmium, copper, manganese, mercury, nickel, lead, tellurium, thallium, zinc). The lead concentration in the blood and urine was very high at 6.3 (normal < 1.9) μmol/L and 3.9 (normal < 1.1) μmol/L, respectively.

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