Related Experiment Video
Updated: Aug 8, 2026

Molten-Salt Synthesis of Complex Metal Oxide Nanoparticles
Published on: October 27, 2018
Synthesis and crystal structure of NaRbB5O8(OH)·H2O
Xin-Yue Zhang1, Hui-Lin Xiao1, Xiao-Liang Zhou1
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.
None:
A new mixed alkali-metal borate, poly[[sodium rubidium [hydroxido-octa-μ-oxido-penta-borate] monohydrate], NaRbB5O8(OH)·H2O, has been synthesized via a surfactant-thermal method using H3BO3, Rb2CO3, Na2SiO3·9H2O, ethanedi-amine and poly(ethyl-ene glycol)-400 as starting materials. It features a layered boron-oxide framework constructed from penta-borate [B5O10(OH)]6- building units. Adjacent single layers are inter-connected to form double layers through hydrogen-bonding inter-actions. Na+, Rb+ cations and H2O mol-ecules are located in the voids of the framework.
Related Concept Videos
Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Determination of Crystal Structures
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Imperfections in Crystal Structure: Non-Stoichiometric Defects
The Seven Crystal Systems: Overview

