Experimental Investigation of the Cd-Pr Phase Diagram
- Author(s)
- Thomas Reichmann, Herta Silvia Effenberger, Herbert Ipser
- Abstract
The complete Cd-Pr equilibrium phase diagram was investigated with a combination of powder-XRD, SEM and DTA. All intermetallic compounds within this system, already reported in literature, could be confirmed: CdPr, Cd2Pr, Cd3Pr, Cd45Pr11, Cd58Pr13, Cd6Pr and Cd11Pr. The corresponding phase boundaries were determined at distinct temperatures. The homogeneity range of the high-temperature allotropic modification of Pr could be determined precisely and a limited solubility of 22.1 at.% Cd was derived. Additionally, single-crystal X-ray diffraction was employed to investigate structural details of Cd2Pr; it is isotypic to the AlB2-type structure with a z value of the Cd site of 0.5. DTA results of alloys located in the adjacent two-phase fields of Cd2Pr suggested a phase transformation between 893 and 930°C. For the phase Cd3Pr it was found that the lattice parameter a changes linearly with increasing Cd content, following Vegard’s rule. The corresponding defect mechanism could be evaluated from structural data collected with single-crystal XRD. Introduction of a significant amount of vacancies on the Pr site and the reduction in symmetry of one Cd position (8c to 32f) resulted in a noticeable decrease of all R-values.
- Organisation(s)
- Department of Functional Materials and Catalysis, Department of Mineralogy and Crystallography
- Journal
- PLoS ONE
- Volume
- 9
- No. of pages
- 14
- ISSN
- 1932-6203
- DOI
- https://doi.org/10.1371/journal.pone.0094025
- Publication date
- 04-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104003 Inorganic chemistry, 104017 Physical chemistry, 105113 Crystallography
- Keywords
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/362ac0b5-c038-41e6-bab8-941cc319707c