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Published on: April 9, 2018
Synthesis and crystal structure of NaCsB5O8(OH)·H2O
Mei-Jun Zou1, Xiao-Liang Zhou1, Jian-Wen Cheng1
1Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry Zhejiang Normal University,Jinhua Zhejiang 321004 People's Republic of China.
Summary
Researchers synthesized a novel sodium caesium borate, NaCsB5O8(OH)·H2O, featuring a unique layered crystal structure with penta-borate units. This discovery expands the field of mixed alkali metal borates.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Crystallography
Background:
- Mixed alkali metal borates are a class of compounds with diverse structures and properties.
- Understanding the synthesis and structural characteristics of novel borates is crucial for developing new materials.
Purpose of the Study:
- To synthesize and characterize a new mixed alkali metal borate compound.
- To elucidate the crystal structure and bonding of the synthesized material.
Main Methods:
- Solvothermal reaction using boric acid, caesium carbonate, sodium borate tetrahydrate, formic acid, and ethanol.
- Single-crystal X-ray diffraction for crystal structure determination.
Main Results:
- A new mixed alkali metal borate, sodium caesium penta-borate hydroxide monohydrate (NaCsB5O8(OH)·H2O), was successfully synthesized.
- The crystal structure features penta-borate [B5O10(OH)]6- building units arranged in layers parallel to the ab plane.
- Na+ and Cs+ cations, along with water molecules, occupy inter-layer spaces, exhibiting specific coordination numbers and hydrogen bonding.
Conclusions:
- The solvothermal method is effective for synthesizing novel mixed alkali metal borates.
- The layered structure with nine-membered rings and inter-layer cations/water molecules defines the unique characteristics of NaCsB5O8(OH)·H2O.
- This study contributes to the understanding of borate chemistry and crystal engineering.
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