Sites are separable in garnets with ALCHEMI

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Abstract

It is shown in this paper that - in contrast to the accepted belief in the literature - it is possible to determine if a minority component is located on the dodecahedral, octahedral or tetrahedral sites in a garnet single crystal. Previous literature regarded the dodecahedral sites indistinguishable form the tetrahedral sites. Our prediction about the separability is based upon dynamical Bloch-wave calculations and proved experimentally in a transmission electron microscope (TEM) on two different natural garnets (almandine and grossular). The crystallographic positions of the minority components are determined in an ALCHEMI experiment that makes use of the channeling of electrons in special directions of a single-crystal sample.

Original languageEnglish
Pages (from-to)489-492
Number of pages4
JournalMikrochimica Acta
Volume132
Issue number2-4
Publication statusPublished - Dec 1 2000

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Keywords

  • ALCHEMI
  • Channeling
  • Crystallographic site separation
  • Garnet
  • TEM

ASJC Scopus subject areas

  • Analytical Chemistry

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