Assertion: cesium | /r/AtLocation | mineral
Facets:
value: naturally
type: MANNER
Source sentences:
text: Cesium is the most abundant element of the 45sten on Earth and occurs in the minerals Pollucit, Avogadrit, Pezzottaite, Londonite, Rhoditic, Beryl and some potassium ores.
text: Cesium is a metal that occurs naturally in various minerals in a nonradioactive stable form, or as produced from uranium and plutonium during fission in nuclear reactors that is radioactive and unstable.
text: Cesium occurs in small quantities in a number of minerals.