Edge-Sharing BO 4 Tetrahedra in the Structure of Hydrothermally Synthesized Barium Borate: α-Ba 3 [B 10 O 17 (OH) 2 ]

Two polymorphs of a new barium borate, α- and β-Ba [B O (OH) ], have been synthesized through hydrothermal reactions at 500 °C and 1000 bar and their structures determined by single-crystal X-ray diffraction. The 3D framework structure of the α-form is formed of two different fundamental building bl...

Full description

Saved in:
Bibliographic Details
Published in:Inorganic chemistry 2019-04, Vol.58 (7), p.4085-4088
Main Authors: Jen, I-Hsuan, Lee, Yi-Chang, Tsai, Cheng-En, Lii, Kwang-Hwa
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two polymorphs of a new barium borate, α- and β-Ba [B O (OH) ], have been synthesized through hydrothermal reactions at 500 °C and 1000 bar and their structures determined by single-crystal X-ray diffraction. The 3D framework structure of the α-form is formed of two different fundamental building blocks (FBB) with the descriptors 4Δ6□:[⧄⧅]--|--| and 2Δ3□:-. The former FBB is unique and contains unusual edge-sharing BO tetrahedra. The β-form has a double layer structure which is formed of two stereoisomers of a pentaborate polyanion with the descriptor 2Δ3□:-. Within a double layer, one sheet composed of FBBs in l configuration is connected by sharing tetrahedral vertices to the other sheet of FBBs in d configuration. The α-form is the first compound with edge-sharing BO tetrahedra synthesized in aqueous solution under hydrothermal conditions.
ISSN:0020-1669
1520-510X
DOI:10.1021/acs.inorgchem.9b00345