Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Jahn-Teller effect and features of divalent copper ion behavior in multicomponent borate crystals
View through CrossRef
AbstractCrystals of YGa3(BO3)4, YAl3(BO3)4, EuGa3(BO3)4 and EuAl3(BO3)4 with copper alloy were studied by electron paramagnetic resonance and X-ray diffraction analysis. The lattice parameters and coordinates of copper-doped boron atoms were determined. The study of EPR spectra showed that copper is in the divalent state and replaces aluminum ions with C2 node symmetry. In YAl3(BO3)4:Cu crystals, a ligand structure exists due to the interaction of copper electrons with yttrium nuclei. The parameters of the spin Hamiltonian describing the behavior of the Cu2+ spectrum have been determined. The deviation of the Z-axis spectra from the C3 axis by 54(1)° is due to Jahn-Teller vibronic interaction and monoclinic distortion. In the EuGa3(BO3)4 crystal, a new spectrum 2 was found, which also belongs to divalent copper but is observed at an excited state 31 cm−1 away from the ground state. Above 70 K, an isotropic EPR line with a width of 450 Gs, g = 2.1, appears and exists up to room temperature.
Springer Science and Business Media LLC
Title: Jahn-Teller effect and features of divalent copper ion behavior in multicomponent borate crystals
Description:
AbstractCrystals of YGa3(BO3)4, YAl3(BO3)4, EuGa3(BO3)4 and EuAl3(BO3)4 with copper alloy were studied by electron paramagnetic resonance and X-ray diffraction analysis.
The lattice parameters and coordinates of copper-doped boron atoms were determined.
The study of EPR spectra showed that copper is in the divalent state and replaces aluminum ions with C2 node symmetry.
In YAl3(BO3)4:Cu crystals, a ligand structure exists due to the interaction of copper electrons with yttrium nuclei.
The parameters of the spin Hamiltonian describing the behavior of the Cu2+ spectrum have been determined.
The deviation of the Z-axis spectra from the C3 axis by 54(1)° is due to Jahn-Teller vibronic interaction and monoclinic distortion.
In the EuGa3(BO3)4 crystal, a new spectrum 2 was found, which also belongs to divalent copper but is observed at an excited state 31 cm−1 away from the ground state.
Above 70 K, an isotropic EPR line with a width of 450 Gs, g = 2.
1, appears and exists up to room temperature.
Related Results
A Unified Hamiltonian Formalism of Jahn-Teller and Pseudo-Jahn-Teller Problems in Axial Symmetries
A Unified Hamiltonian Formalism of Jahn-Teller and Pseudo-Jahn-Teller Problems in Axial Symmetries
A formalism for expansions of all Jahn-Teller and pseudo-Jahn-Teller Hamiltonian
operators in all axial symmetries is presented. The formalism provides Hamiltonian
expansions up ...
SIMPLE FORMS OF ZIRCON CRYSTALS FROM CRYSTALLINE ROCKS OF THE UKRAINIAN SHIELD AND THEIR MORPHOLOGICAL TYPES
SIMPLE FORMS OF ZIRCON CRYSTALS FROM CRYSTALLINE ROCKS OF THE UKRAINIAN SHIELD AND THEIR MORPHOLOGICAL TYPES
The main basics in geometric crystallography of zircon, developed by many researchers in the 18th - 20th centuries, are briefly described. The data of goniometric study of zircon f...
Ice Growth and Platelet Crystals in Antarctica
Ice Growth and Platelet Crystals in Antarctica
<p>First-year land-fast sea ice growth in both the Arctic and the Antarctic is characterised by the formation of an initial ice cover, followed by the direct freezing of seaw...
Asymmetric Domino Reactions Based on the Use of Chiral Metal Catalysts
Asymmetric Domino Reactions Based on the Use of Chiral Metal Catalysts
This chapter illustrates how much asymmetric organometallic catalysis has contributed to the development of enantioselective domino and multicomponent reactions. It updates the maj...
Diffusion and Ion Conduction in Cation-Conducting Oxide Glasses
Diffusion and Ion Conduction in Cation-Conducting Oxide Glasses
In this Chapter we review knowledge about diffusion and cation conduction in oxide glasses. We first remind the reader in Section 1 of major aspects of the glassy state and recall ...
IMPROVED SOLUBILITY NOVEL MULTICOMPONENT CRYSTALS OF FENOFIBRIC ACID-ACETYLSALISYLIC ACID
IMPROVED SOLUBILITY NOVEL MULTICOMPONENT CRYSTALS OF FENOFIBRIC ACID-ACETYLSALISYLIC ACID
Solubility is an important physicochemical property of active pharmaceutical ingredients. Poor water solubility of active pharmaceutical ingredients leads to low bioavailability; t...
Chemical pre-intercalation synthesis approach for novel layered cathode materials for Li-ion and beyond Li-ion batteries
Chemical pre-intercalation synthesis approach for novel layered cathode materials for Li-ion and beyond Li-ion batteries
Beyond-lithium ion (BLI) alkali ion-based batteries are rising in interest among researchers because of their utilization of more abundant, cost-effective charge carriers, includin...
Asymmetric Domino Reactions Based on the Use of Chiral Substrates
Asymmetric Domino Reactions Based on the Use of Chiral Substrates
This chapter updates the recent developments in asymmetric one-, two-, and multicomponent domino reactions which involve chiral substrates. It is divided into two sections, dealing...