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

Phase Transitions01:21

Phase Transitions

A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
Phase Transitions02:31

Phase Transitions

Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to occupy...
Lattice Energies of Ionic Crystals01:27

Lattice Energies of Ionic Crystals

Lattice energy represents the energy released when gaseous cations and anions combine to form an ionic solid, reflecting the strength of electrostatic interactions within the crystal. This process is fundamentally governed by Coulombic attraction between oppositely charged ions, where the potential energy varies inversely with the interionic distance and directly with the product of ionic charges. As ions approach one another, the electrostatic energy becomes increasingly negative, indicating a...
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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...
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:

You might also read

Related Articles

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

Sort by
Same author

FKRP-dependent glycosylation of fibronectin regulates muscle pathology in muscular dystrophy.

Nature communications·2021
Same author

Fluoroscopic-guided laparoscopic ileocolic resection with retrieval of retained (PillCam<sup>®</sup>) wireless capsule endoscope.

Techniques in coloproctology·2019
Same author

Evaluation of a scapula spinal marker cluster to track the scapula kinematics during manual wheelchair propulsion.

Computer methods in biomechanics and biomedical engineering·2017
Same author

Tracking the scapula motion through multibody kinematics optimisation to study manual wheelchair propulsion.

Computer methods in biomechanics and biomedical engineering·2017
Same author

Erratum: Lattice Dynamics of EuO: Evidence for Giant Spin-Phonon Coupling [Phys. Rev. Lett. 116, 185501 (2016)].

Physical review letters·2017
Same author

Anomalous Lattice Dynamics of EuSi_{2} Nanoislands: Role of Interfaces Unveiled.

Physical review letters·2017

Related Experiment Video

Updated: May 23, 2026

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
11:25

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

Structural phase transition in LiFeSi2O6 from ab initio calculations.

A Siegel1, P Piekarz, K Parlinski

  • 1Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Kraków, Poland.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|April 14, 2012
PubMed
Summary

Density functional theory reveals a soft mode at the Z point, driving the crystal structure phase transition in LiFeSi(2)O(6) between high-temperature C2/c and low-temperature P2(1)/c phases.

More Related Videos

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Related Experiment Videos

Last Updated: May 23, 2026

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
11:25

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Area of Science:

  • Solid-state physics
  • Materials science
  • Computational materials science

Background:

  • LiFeSi(2)O(6) exhibits distinct high-temperature (C2/c) and low-temperature (P2(1)/c) crystal structures.
  • Understanding the mechanism of structural phase transitions is crucial for materials design.

Purpose of the Study:

  • To investigate the crystal structure changes in LiFeSi(2)O(6) during its phase transition.
  • To elucidate the role of phonon modes in inducing the structural transformation.
  • To explore the pressure dependence of the phase transition mechanism.

Main Methods:

  • Density functional theory (DFT) calculations.
  • Phonon dispersion curves and density of states analysis.
  • Infrared absorption coefficient calculations.

Main Results:

  • Calculated phonon dispersion curves and density of states for both C2/c and P2(1)/c phases.
  • Identified a soft mode at the Z point in the high-symmetry C2/c phase, responsible for the transition.
  • Analyzed infrared absorption coefficients for both phases.
  • Investigated the pressure dependence of the soft mode.

Conclusions:

  • The phase transition in LiFeSi(2)O(6) is driven by a soft phonon mode at the Z point.
  • DFT calculations provide insights into the mechanism of structural phase transitions in this material.
  • The study contributes to understanding the relationship between crystal structure, phonons, and phase transitions.