How are cesium and thallium utilized in various industries?

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Cesium and thallium have significant applications in various fields, particularly in nuclear medicine. Radioisotopes of cesium, such as Cs-137, are utilized in radiotherapy to target and kill cancer cells. Thallium is also important in medical diagnostics and is used in thallium bromide-iodide crystals for infrared optical materials. Additionally, thallium combined with sulfur, selenium, and arsenic is employed to create low melting glasses that remain durable and insoluble in water at room temperature. Thallium oxide is known for producing high refractive index glasses. However, thallium's toxicity raises concerns, as it has been associated with criminal activities. The discussion also touches on the availability of cesium and thallium in chemist stores, with skepticism regarding the necessity or legality of purchasing these elements.
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It goes like this, very simple:

How and where can cesium and thallium be used?
 
Chemistry news on Phys.org
Here are two:

Radioisotopes of both elements are used in nuclear medicine for the diagnosis of various medical conditions.

Cs-137 is also used as a source for radiotherapy machines, to kill cancer cells.

- Warren
 
Here is another for thallium..


Thallium bromide-iodide crystals have been used as infrared optical materials.


Thallium along with sulfur or selenium and arsenic is used to produce low melting glasses witch become fluid between 125 and 150C. These glasses have properties at room temperatures similar to ordinary glasses and are said to be durable and insoluble in water.

Thallium oxide has been used to produce glasses with a high index of refraction
 
But thallium is poisonous as well isn't it? I once saw a crime programme on Discovery Channel where a murderer had used thallium to kill a man.

Can I buy cesium or thallium at a chemist's store?
 
Originally posted by Thallium
Can I buy cesium or thallium at a chemist's store?
Why would you want to do that?
 
Cannot answer that.
 

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