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The positions of lanthanum (actinium) and lutetium (lawrencium) in the periodic table: an update


This article updates the author’s 1982 argument that lutetium and lawrencium, rather than lanthanum and actinium, should be assigned to the d-block as the heavier analogs of scandium and yttrium, whereas lanthanum and actinium should be considered as the first members of the f-block with irregular configurations. This update is embedded within a detailed analysis of Lavelle’s abortive 2008 attempt to discredit this suggestion.

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Correspondence to William B. Jensen.

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Jensen, W.B. The positions of lanthanum (actinium) and lutetium (lawrencium) in the periodic table: an update. Found Chem 17, 23–31 (2015).

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  • Periodic table
  • Group 3
  • Lanthanum
  • Lutetium
  • Actinium
  • Lawrencium