Title

Broad Distribution Of Crystal-Field Environments For Nd3+ In Calcite

Keywords

Calcite; Calcium carbonate; Carbonate minerals; Neodymium; Nuclear waste

Abstract

Calcite crystals were grown from solution with single-crystal dimensions up to 3 mm and doped up to ∼0.1 at% with Nd3+ ions. Phase purity was verified by powder X-ray diffraction. The concentration of Nd3+ was measured by energy-dispersive spectrometry and Rutherford backscattering spectrometry. Micro X-ray fluorescence mapping of the calcite grains indicates uniform Nd distribution in as-grown crystal grains X-ray absorption fine structure suggests that Nd3+ is substituted for Ca2+ with local lattice distortion. Temperature-dependent near-infrared spectroscopy of Nd3+ impurities in calcite reveals large inhomogeneous line-widths and smooth line profiles that are characteristic of glassy hosts, though the samples are well crystallized.

Publication Date

8-1-2003

Publication Title

Physics and Chemistry of Minerals

Volume

30

Issue

7

Number of Pages

440-448

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s00269-003-0331-5

Socpus ID

0141723674 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0141723674

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