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<p>A theoretical study has been conducted to evaluate the amount of timely existing astatine on Earth. Natural uranium series (<sup>238</sup>U) and actinide series (<sup>235</sup>U), as well as artificial neptunium series (<sup>237</sup>Np) were selected as astatine sources, contributing <sup>215</sup>At, <sup>217</sup>At, <sup>218</sup>At and <sup>219</sup>At. The results mass of current naturally-existing astatine is estimated to be 101.27–130.20&#xa0;mg, with the abundances of <sup>215</sup>At, <sup>217</sup>At, <sup>218</sup>At, and <sup>219</sup>At being 4.14 × 10<sup>–8</sup>, 3.89 × 10<sup>–10</sup>, 9.91 × 10<sup>–1</sup>, and 8.36 × 10<sup>–3</sup>, respectively.</p>

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How much astatine is existing in nature?

  • 期刊论文

  • 发表日期：

    2025年7月12日

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  • Long Qiu,
  • Yadong Wang,
  • Ruitong Hou,
  • Wenliang Li,
  • Jiali Liao,
  • Yuanyou Yang,
  • Ning Liu,
  • Feize Li

摘要

A theoretical study has been conducted to evaluate the amount of timely existing astatine on Earth. Natural uranium series (238U) and actinide series (235U), as well as artificial neptunium series (237Np) were selected as astatine sources, contributing 215At, 217At, 218At and 219At. The results mass of current naturally-existing astatine is estimated to be 101.27–130.20 mg, with the abundances of 215At, 217At, 218At, and 219At being 4.14 × 10–8, 3.89 × 10–10, 9.91 × 10–1, and 8.36 × 10–3, respectively.