The luminescent Eu3+ ion as a probe of lanthanide impurities in crystallized gypsum

D. Van Der Voort*, G. Blasse, G. J. Witkamp, G. M. Van Rosmalen, L. H. Brixner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The luminescence of the Eu3+ ion in gypsum, CaSO4·2H2O, crystallized from aqueous solutions, is investigated in order to contribute to the unravelling of the precipitation mechanism of gypsum in industrial processes where all kinds of impurities are distributed between the solution and the crystals. Na+-containing solutions show NaEu(S04)2·H2O crystallization next to Eu3+ incorporated into the gypsum lattice. The Eu3+ ion in gypsum shows extraordinary luminescence characteristics, caused by a strong linear crystal-field. The quantum efficiency of the luminescence is low due to the strong relaxation in the excited charge-transfer state and the quenching by the water molecules coordinating the Eu3+ ion in the gypsum lattice. The Eu3+ ion can be used as a probe to investigate lanthanide impurities in crystallized gypsum.

Original languageEnglish (US)
Pages (from-to)175-187
Number of pages13
JournalMaterials Chemistry and Physics
Volume24
Issue number1-2
DOIs
StatePublished - Jan 1 1989
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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