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Refractive Index and Optical Dispersion of In2O3, InBO3 and Gahnite

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  • Refractive indices of In₂O₃, In₂₋ₓSnₓO₃, InBO₃ and 2 different gahnite crystals (ZnAl₂O₄ and Zn.₉₅Fe.₀₅Al₂O₄) were measured at wavelengths of 435.8 to 643.8 nm and were used to calculate n at λ = 589.3 nm ( nD ) and at λ = ∞ (n∞) using the one-term Sellmeier equation 1/(n²-1) = -A/λ² + B. Total polarizabilities, αₜₒₜₐₗ, were calculated from n∞ and the Lorenz-Lorentz equation. Refractive indices, nD and dispersion values, A, were, respectively, 2.093 x 10-16 m² and 133 x 10⁻¹⁶ m² for In₂O₃; 2.0755 and 138 x 10⁻¹⁶ m² for In₂₋ₓSnₓO₃; 1.7940 and 57 x 10⁻¹⁶ m² for ZnAl₂O₄ and 1.7995 and 56 x 10⁻¹⁶ m² for Zn.₉₅Fe.₀₅Al₂O₄ and n₀ = 1.8782 and ne = 1.7756 and <63> x 10⁻¹⁶ m² for InBO₃.
  • Please note: Authors differ slightly in the published version.
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  • Medenbach, O., Siritanon, T., Subramanian, M. A., Shannon, R. D., Fischer, R. X., & Rossman, G. R. (2013). Refractive index and optical dispersion of In₂O₃, InBO₃ and gahnite. Materials Research Bulletin, 48(6), 2240-2243. doi:10.1016/j.materresbull.2013.02.057
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  • 48
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  • 6
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  • The published article can be found at Materials Research Bulletin - Journal - Elsevier.
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  • The analyses were supported, in part, by the National Science Foundation grant EAR-0947956 to GRR. Work at Oregon State University was supported by National Science Foundation grant DMR-0804167 to MAS.
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  • This is an author's peer-reviewed final manuscript, as accepted by the publisher.
  • Author acknowledgements: We are indebted to Chi Ma at the Caltech Analytical Facility for microprobe analyses of the In2O3, InBO3 and gahnite samples and to Dieter Dettmar for skillful preparation of crystal prisms. Brian Cook originally provided the specimen of gahnite1 from his mine and Prof. Robert Dymek originally provided the specimen and analysis of gahnite2 from the Harvard mineral collection.

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