Related Experiment Video
Updated: May 21, 2026

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
A new noncentrosymmetric vanadoborate: synthesis, crystal structure and characterization of K2SrVB5O12
Songjie Chen1, Shilie Pan, Wenwu Zhao
1Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 40-1 South Beijing Road, Urumqi 830011, China.
Abstract:
A new noncentrosymmetric vanadoborate compound, K(2)SrVB(5)O(12), is synthesized by the high temperature solution method. It crystallizes in the monoclinic space group P2(1) (no. 4) with lattice constants a = 6.618(3) Å, b = 8.378(4) Å, c = 9.974(5) Å, β = 99.789(6)°, Z = 2. The structure consists of vanadoborate anionic layers with K(+) and Sr(2+) cations filling the void spaces via electrostatic interactions to form the three-dimensional network. The TG-DSC curves and the UV-Vis-NIR diffuse reflectance spectrum were measured. Band structures and density of states were calculated. The powder second harmonic generation (SHG) effect of K(2)SrVB(5)O(12) is similar to that of KH(2)PO(4) (KDP).
Related Concept Videos
Determination of Crystal Structures
Imperfections in Crystal Structure: Non-Stoichiometric Defects
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...
Molecular and Ionic Solids
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Valence Bond Theory
Symmetry Elements in a Crystal

