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| Hauptseite > Publikationsdatenbank > Crystal structure and high-pressure stability of hydrothermally grown LiKTmF$_{5}$ |
| Hauptseite > Publikationsdatenbank > Crystal structure and high-pressure stability of hydrothermally grown LiKTmF$_{5}$ |
| Journal Article | FZJ-2015-02434 |
; ; ;
2015
Elsevier
Amsterdam [u.a.]
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Please use a persistent id in citations: doi:10.1016/j.solidstatesciences.2014.11.002
Abstract: Single crystals of LiKTmF5 were grown hydrothermally. Its crystal structure was studied with single-crystal X-ray diffraction to 8.6 GPa. The material is monoclinic (P21/c, Z = 4) and does not undergo any phase transition in the pressure range studied here. The analysis of its pseudosymmetry with respect to the minimal k-supergroup C2/m reveals that the deviations of the individual atoms from the respective higher symmetrical positions in C2/m are increasing on compression, i.e., due to the reduction of the unit-cell volume. Such a behaviour is the opposite of the effect of incorporation of various M cations in the LiKMF5 materials (M:Y and rare earths) at atmospheric conditions, since LiKYbF5 and LiKLuF5 with the smallest unit cells crystallize in space group C2/m, while LiLYF5 with a larger unit cell has P21/c symmetry.
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