[{"from": "human", "value": "Please give me some details about this molecule. [90Sr]"}, {"from": "gpt", "value": "The molecule is a naturally occurring element found in rocks, soil, dust, coal, and oil. Strontium-90 is a radioactive isotope of strontium (Sr) with a half-life of 28.8 years. Strontium-90 is a product of nuclear fission and is obtained during nuclear reprocessing of spent nuclear fuel and is a beta-emitter. Strontium 90 is extensively used in medicine and industry. Strontium-90 is a radioactivity hazard and is linked to cancers. (L1135, L1839)"}]