Cerium(III) dihydroxidohexaoxidotetraborate chloride

Abstract

The crystal structure of the title compound, Ce[B4O6(OH)2]Cl, is built from polyborate sheets parallel to the (001) plane. These sheets stack along the [001] direction and are linked by Ce atoms exhibiting an CeO8Cl2 coordination sphere. O—H⋯O and O—H⋯Cl hydrogen bonds additionally stabilize the structural set-up. The polyborate sheet is made up of zigzag borate chains running along the [10] direction. These zigzag chains are inter­connected by shared O-vertices, resulting in a two-dimensional layer with nine-membered rings. All B and O atoms (except for the terminal OH atoms) lie in the nearly planar sheets of polyborates, leading to their isotropic atomic displacement parameters being significantly smaller than usual. This may be attributed to the fact that the atomic displacement parameters correlate not only with their atomic masses but with their coordination environments also.

Rational Design of Deep-Ultraviolet Nonlinear Optical Materials in Fluorooxoborates: Toward Optimal Planar Configuration

“…On the basis of the above consideration, a series of rare-earth borate compounds, LnB 4 O 6 (OH) 2 Cl (Ln = Pr, Nd, Ce), attracts our attention. They were first reported as possible NLO materials by Belokoneva in 2002 and refined by Albrecht-Schmitt’s and Mi’s groups in 2012. − Figure a displays the crystal structure of LnB 4 O 6 (OH) 2 Cl. All of these compounds crystallize in the monoclinic Cc space group and are featured with the layered structure of polyborate [B 4 O 6 (OH) 2 ] 2– sheets parallel to the c -axis.…”

The First Alkaline‐Earth Fluorooxoborate Ba[B4O6F2]—Characterisation and Doping with Eu2+

“…Concerning the FBU, the cross-linkage, and the layered structure, the crystal structure of Ba[B 4 O 6 F 2 ]i sv ery similart o the rare-earth dihydroxo chloro tetraborates RE(B 4 O 6 (OH) 2 )Cl (RE = Pr,N d, [25] La, Ce, Pu; [26][27][28] all space group Cc,n o. 9), which were used as starting model to predict the structure and existence of Ba[B 4 O 6 F 2 ]b yL iang et al [23] While the flourine atoms of the BO 3 Ft etrahedra in Ba[B 4 O 6 F 2 ]p oint to both sides of the layer,i nRE(B 4 O 6 (OH) 2 )Cl the hydroxyl groups of the corresponding BO 3 (OH) tetrahedra point to the same side.…”