Excess properties of the (Ln2−2xCaxThx)(PO4)2 (Ln = La, Ce) solid solutions |
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| Authors: | R.J.M. Konings M. Walter K. Popa |
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| Affiliation: | aEuropean Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe, Germany;b“Al. I. Cuza” University, Department of Chemistry, 11-Carol I Blvd., 700506 Iasi, Romania |
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| Abstract: | X-ray powder diffraction at room temperature and drop calorimetry at T = 1005 K were performed on LnPO4–CaTh(PO4)2 (Ln = La, Ce) solid solutions. The results show excess molar volume and excess enthalpy indicating deviations from ideal behaviour that have been interpreted in terms of lattice strains resulting from the ion size effects of substitution of the Ln3+ with (Ca2+ + Th4+). |
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| Keywords: | Monazite Lanthanide phosphates Solid solutions Mixing properties Calorimetry |
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