___ Origin

Cesium is the 40th most abundant element within the periodic system. The commercially most important cesium bearing ore is pollucite, a cesium aluminum silicate with the chemical composition (Cs,Na)2Al2Si4O12.(H2O).
This ore was formed a long time ago, when the earth´s surface was much hotter than today and molten silicates solidified to form huge granite bodies. During solidification, some chemical elements, including cesium, were concentrated in the last fractions to freeze and crystallize as separate minerals.
Pollucite is mined in Canada, Africa and at other locations throughout the world, from where it is shipped to Chemetall´s factory at Langelsheim, Germany. Here it is processed into a full range of cesium containing products.
Although cesium has a large number of isotopes, naturally occuring cesium is exclusively the nonradioactive isotope cesium-133.

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