Broad Distribution of Crystal Field Environments for Nd3+ in Calcite
Calcite micro-crystals were grown from solution with single crystal dimensions up to 3 mm and doped up to ~0.1% 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 indicates 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. These results suggest a broad distribution of crystal-field environments for Nd3+ as a result of charge compensation and inhomogeneous lattice strain.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 15004368
- Report Number(s):
- PNNL-SA-35648; 1638; KP1301020
- Journal Information:
- Physics and Chemistry of Minerals, 30(7):440 - 448, Journal Name: Physics and Chemistry of Minerals, 30(7):440 - 448 Journal Issue: 7 Vol. 30; ISSN 0342-1791; ISSN PCMIDU
- Country of Publication:
- United States
- Language:
- English
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