Journal Article

PUBDB-2026-01762

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High-Pressure Synthesis and Structural Studies of La, Sm, Gd, and Dy Chlorides and Chloride Carbides

Akbar, F. I. (Corresponding author) ; Aslandukova, A.Extern* ; Aslandukov, A. ; Yin, Y.Extern* ; Bykova, E.Extern* ; Bykov, M.Extern* ; Laniel, D.Extern* ; Milkin, P.Extern* ; Fedotenko, T.Extern*DESY* ; Wright, J. ; Pakhomova, A.Extern* ; Garbarino, G. ; Mezouar, M. ; Hanfland, M. ; Dubrovinskaia, N. ; Dubrovinsky, L. (Corresponding author)Extern*XFEL.EU*

2026
ACS Publications Washington, DC

This record in other databases:  

Please use a persistent id in citations: doi:10.1021/acsomega.5c09373  doi:10.3204/PUBDB-2026-01762

Abstract: High-pressure synthesis provides unique pathways to materials with unprecedented structures and properties. Here we report the synthesis and structural characterization of novel rare-earth (La, Sm, Gd, Dy) chlorides, chloride carbides, and oxychloride phases obtained due to complex chemical reactions in diamond anvil cells after laser heating of rare-earth metals and NaCl at pressures of 39–127 GPa and temperatures of 2500–2800 K. Synchrotron single-crystal X-ray diffraction analysis allowed us to solve previously unknown crystal structures of binary (La$_2$Cl, LaCl, LaCl$_3$, DyCl) and ternary (DyNa$_2$Cl$_5$, Sm$_2$ClC$_2$, Gd$_2$ClC$_2$, Dy$_2$ClC$_2$, Sm$_{19}$ClC$_{18}$, Gd$_{19}$ClC$_{18}$, Dy$_5$Cl$_3$C, DyOCl) compounds. Significantly, we identified trans-polyacetylene-like carbon chains in lanthanide chloride carbides, a structural motif previously hypothesized but not observed experimentally. Our findings highlight the enhanced chemical reactivity of alkali halides under extreme conditions, uncovering novel chemical bonding and expanding the landscape of potential functional materials accessible through high-pressure synthesis.

---

Contributing Institute(s):

1. Experimentebetreuung PETRA III (FS-PET-D)
2. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20231053 (I-20231053) (I-20231053)

Experiment(s):

1. PETRA Beamline P02.2 (PETRA III)

Appears in the scientific report 2026

---

Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; Fees ; IF < 5 ; JCR ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---