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Broad distribution of crystal-field environments for Nd3+ in calcite

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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 linewidths and smooth line profiles that are characteristic of glassy hosts, though the samples are well crystallized.

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Acknowledgments.

This research was supported by DOE grant DE-FG07–99ER15013 through the Environmental Management Science Program, and an AWU fellowship. The authors wish to express their gratitude to B.P. Tonner, B.H.T. Chai, and É.J. Elzinga for their useful suggestions, to S. Heald and R. Gordon for assistance with EXAFS data collection at the APS, and to C. Rivero for assistance with fluorescence measurements.

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Authors and Affiliations

  1. University of Central Florida, Department of Physics, Orlando, Florida, 32816

    S. H. Withers, R. E. Peale, A. F. Schulte & G. Braunstein

  2. William R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington

    K. M. Beck & W. P. Hess

  3. Department of Geosciences, Center for Environmental Molecular Science, State University of New York, Stony Brook, New York, 11794-2100

    R. J. Reeder

Authors
  1. S. H. Withers
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  2. R. E. Peale
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  3. A. F. Schulte
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  4. G. Braunstein
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  5. K. M. Beck
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  6. W. P. Hess
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  7. R. J. Reeder
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Correspondence to R. E. Peale.

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Withers, S., Peale, R., Schulte, A. et al. Broad distribution of crystal-field environments for Nd3+ in calcite. Phys Chem Minerals 30, 440–448 (2003). https://doi.org/10.1007/s00269-003-0331-5

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

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