Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

49.4K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
49.4K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

31.5K
Crystal Field Theory
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...
31.5K
Ionic Crystal Structures02:42

Ionic Crystal Structures

19.8K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
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...
19.8K
Crystallographic Point Groups01:29

Crystallographic Point Groups

35
Crystallographic point groups represent the various symmetry operations that can occur within crystals. They are unique in that at least one point will always remain unchanged during these actions. For instance, consider the triclinic system. This system, devoid of any axis or plane of symmetry, aligns with the C1 and Ci point groups.where Cᵢ is characterized solely by a center of inversion.Contrastingly, the monoclinic system introduces an element of symmetry. This system with one plane...
35
The Seven Crystal Systems: Overview01:24

The Seven Crystal Systems: Overview

82
Crystals with various point group symmetries belong to different crystal classes, which are synonymous terms. Despite being in the same class, crystals may have distinct shapes, like cubes and octahedra. There are 32 three-dimensional point groups, all of which are systematically divided into seven crystal systems.The basic cubic crystal system, exemplified by NaCl, features orthogonal vectors (α = β = �� = 90°) of equal lengths (a = b = c). When specific...
82
Unit Cells01:18

Unit Cells

44
A crystal's internal structure is an orderly array of atoms, ions, or molecules, and the details of this array significantly influence the solid's properties. In a crystal, periodically repeating 'structural motifs' - which could be atoms, molecules, or groups thereof - create a 'space lattice.' This is essentially a three-dimensional, infinite array of points, each surrounded by its neighbors in an identical way, forming the basic structure of the crystal.A 'unit cell' is a theoretical...
44

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Vacancy-Mediated NiAs-Ni<sub>2</sub>In-Type Intermetallic Phases: Ni<sub>1+δ</sub>(In/Sb).

Inorganic chemistry·2026
Same author

Sometimes Mother Nature only whispers.

IUCrJ·2025
Same author

Water under hydrophobic confinement: entropy and diffusion.

The Journal of chemical physics·2025
Same author

Iron <i>N</i>-Heterocyclic Carbene Photoactive Complexes with Rigid Phenylethynyl Substituents as Ligand π-System Extensions.

Inorganic chemistry·2025
Same author

Sine Ydun Larsen (1943-2025).

Acta crystallographica. Section A, Foundations and advances·2025
Same author

The entropic origin of the enhancement of liquid diffusion close to a neutral confining surface.

The Journal of chemical physics·2024
Same journal

Nanopore sequencing with proteins: synchronization and dischronization of molecular dynamics simulations with laboratory and industrial developments.

Soft matter·2026
Same journal

Catanionics from biosurfactants and regular surfactants: miscibility and structure.

Soft matter·2026
Same journal

Adhesives with a thickness smaller than the fractocohesive length enhance adhesion.

Soft matter·2026
Same journal

Non-equilibrium phase transitions in hybrid Voronoi models of cell colonies.

Soft matter·2026
Same journal

Effects of methoxy substituents on self-assembly and gelation performance of benzamide-based organogelators.

Soft matter·2026
Same journal

Rheology of <i>Escherichia coli</i> suspensions with various bacterial morphologies and motion characteristics.

Soft matter·2026
See all related articles

Related Experiment Video

Updated: Mar 13, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

9.0K

A smectic dodecagonal quasicrystal.

Alfredo Metere1, Peter Oleynikov2, Mikhail Dzugutov3

  • 1Physical and Life Sciences Directorate, Computational Materials Science in the Condensed Matter and Materials Division, Lawrence Livermore National Laboratory, 7000 East Avenue L-367, Livermore, CA - 94550, USA. metere1@llnl.gov.

Soft Matter
|October 11, 2016
PubMed
Summary
This summary is machine-generated.

Researchers discovered a novel solid smectic phase with dodecagonal order. This quasicrystal structure, formed via molecular dynamics, has implications for colloidal systems and smectic-B crystal formation.

More Related Videos

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
04:09

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Published on: August 30, 2024

845
Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

9.7K

Related Experiment Videos

Last Updated: Mar 13, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

9.0K
Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics
04:09

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Published on: August 30, 2024

845
Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

9.7K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Crystallography

Background:

  • Smectic liquid crystals exhibit layered structures.
  • Quasicrystals possess long-range orientational order but lack translational periodicity.
  • Previous quasicrystal formation often required complex multi-component systems.

Purpose of the Study:

  • To report the discovery of a dodecagonal quasicrystal in a single-component system.
  • To investigate the formation mechanism of this novel quasicrystalline phase.
  • To explore potential applications and similar systems.

Main Methods:

  • Molecular-dynamics simulations were employed.
  • A single-component system with a spherically-symmetric potential was simulated.
  • Constant-density cooling was applied to induce phase transitions.

Main Results:

  • A solid smectic phase with dodecagonal global order was observed.
  • The structure features hexagonally ordered particle layers with 30° rotation between adjacent layers.
  • This quasicrystal formed via a first-order phase transition from an isotropic liquid state.

Conclusions:

  • The findings suggest that dodecagonal quasicrystals can form in simple, single-component systems.
  • This structure may be achievable in systems forming smectic-B crystals.
  • Colloidal particle systems with tuned potentials could also exhibit this quasicrystal.