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Under construction
Taxon: Species francium Marguerite Perey, 1939 - Fr (chemical element)
Classification by:

Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           chemical substances
             chemical elements
               francium Marguerite Perey, 1939 - Fr

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Last updated: 1 Feb 2024