Yttrialite

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Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. A rare, highly radioactive yttrium thorium sorosilicate mineral with conchoidal fracture.
  • The Century Dictionary and Cyclopedia
  • n. A silicate of thorium and the yttrium earths, occurring in massive forms of a dark olive-green color. It is found with gadolinite and other rare species in Llano county, Texas.
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