![]() ![]() As of 2009, the price of 99.8% pure cesium metal was around $10 per gram or $280 per ounce.Another rich source of pollucite is the Karibib Desert in Namibia. One of the richest sources of pollucite, an ore that contains cesium, is the Tanco Mine at Bernic Lake in Manitoba, Canada. Cesium is estimated to be present at an abundance of 1 to 3 parts per million in the Earth's crust, which is a fairly average abundance for a chemical element.Calcium metal may be combined with fused cesium chloride or electric current may be passed through a molten cesium compound. There are two methods used to prepare pure cesium.Nonradioactive cesium and its compounds are used for infrared flares, to make specialty glasses, and in beer brewing. The isotope Cs-137 is used in cancer treatments, to irradiate foods, and as a tracer for drilling fluids in the petroleum industry. Cesium is used in atomic clocks, photoelectric cells, as a catalyst to hydrogenate organic compounds, and as a 'getter' in vacuum tubes.Radioactive cesium presents a health hazard because of the radioactivity, not chemistry. Non-radioactive cesium is not a nutritional requirement for plants or animals, but it's not particularly toxic, either.Some radioisotopes are produced in nature by slow neutron capture within old stars or by the R-process in supernovae. Numerous artificial radioactive isotopes have been produced. ![]()
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