2003/06/30 by D. Errandonea, Daniel Errandonea, F. J. Manjón +5 · 2 citations
Chemistry · Materials Science · Physics and Astronomy · #Crystal Structures and Properties #Inorganic Fluorides and Related Compounds #X-ray Diffraction in Crystallography #cond-mat.mtrl-sci
paper · pdf · doi:10.1016/j.jssc.2003.10.017
38 pages, 10 figures (Figure 5 corrected), accepted for publication in Journal of Solid State Chemistry
openalex publication_date 2003/12/09 · arxiv created 2004/03/08 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The pressure response of the scheelite phase of CaWO4 (YLiF4) and the occurrence of the pressure induced scheelite-to-wolframite (M-fergusonite) transition are reviewed and discussed. It is shown that the change of the axial parameters under compression is related with the different pressure dependence of the W-O (Li-F) and Ca-O (Y-F) interatomic bonds. Phase transition mechanisms for both compounds are proposed. Furthermore, a systematic study of the phase transition in 16 different scheelite ABX4 compounds indicates that the transition pressure increases as the packing ratio of the anionic BX4 units around the A cations increases.