TY  - JOUR
AU  - Grzechnik, Andrzej
AU  - Comer, Sara
AU  - Kolis, Joseph W.
AU  - Friese, Karen
TI  - Crystal structure and high-pressure stability of hydrothermally grown LiKTmF$_{5}$
JO  - Solid state sciences
VL  - 39
SN  - 1293-2558
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2015-02434
SP  - 40 - 44
PY  - 2015
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000348952700008
DO  - DOI:10.1016/j.solidstatesciences.2014.11.002
UR  - https://juser.fz-juelich.de/record/189246
ER  -