Abstract
Physical data are given for the two polymorphs, ancylite type (A-type) and bastnaesite type (B-type), of the rare-earth hydroxycarbonates [Ln(OH)CO3]. They include infrared absorption spectra and, in the case of neodymium electronic absorption spectra for the 4f 3 configuration recorded at 4 K.
From the spectra one concludes that the rare-earth ion largely occupies a single site for both compounds. The OH infrared bands are very sharp. The optical data are compared with the results of structural investigations.
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Dexpert, H., Antic-Fidancev, E., Coutures, J.P. et al. An optical and structural investigation of rare-earth hydroxycarbonates. Journal of Crystallographic and Spectroscopic Research 12, 129–142 (1982). https://doi.org/10.1007/BF01161010
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DOI: https://doi.org/10.1007/BF01161010