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DOE OSTI2020

Materials Data on DyCl3 by Materials Project

DyCl3 crystallizes in the orthorhombic Cmcm space group. The structure is two-dimensional and consists of two DyCl3 sheets oriented in the (0, 1, 0) direction. Dy3+ is bonded in a 8-coordinate geometry to eight Cl1- atoms. There are a spread of Dy–Cl bond distances ranging from 2.65–2.94 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted trigonal non-coplanar geometry to three equivalent Dy3+ atoms. In the second Cl1- site, Cl1- is bonded in an L-shaped geometry to two equivalent Dy3+ atoms.

36 MATERIALS SCIENCE↗

DOE OSTI2022

Synthesis of dysprosium oxychloride (DyOCl)

Dysprosium oxychloride, DyOCl, was synthesized using a simple dehydration method with DyCl3·6H2O. X-ray powder diffraction data was used to determine the crystal structure. The DyOCl compound is isostructural to the matlockite (PbFCl) crystal structure and crystallizes in the tetragonal P4/nmm (#129) space group. The crystal structure contains the alternating cationic layers of (DyO)n and anionic layers of nCl– along the c-axis. The structural data including unit cell, volume, and density of DyOCl were compared to other REOCl data from Inorganic Crystal Structure Database (ICSD) and our previous study on TbOCl. Fourier-transform infrared spectroscopy (FTIR) was performed, and the vibrations of DyOCl possibly from Dy–O and Dy–Cl were observed at 543 and 744 cm-1. Scanning electron microscopy analysis (SEM) showed irregularly shaped crystals.

Chong, Saehwa↗