Related Experiment Video
Updated: Jan 12, 2026
04:36
Production of Synthetic Nuclear Melt Glass
Published on: January 4, 2016
9.8K
Nanolite cargo evolution in trachybasaltic glass comparing magnetite and augite
Michele Cassetta1,2,3, Gian Carlo Capitani4, Rajat Chaudhary5
1Department of Earth Sciences, University of Torino, 10125, Turin, Italy. michele.cassetta@unito.it.
Scientific Reports
|November 7, 2025
Summary
This study reveals how thermal treatments control crystallization in volcanic glass, altering magnetic and mechanical properties. Tailoring crystal content impacts material strength and crack resistance.
Area of Science:
- Geoscience
- Materials Science
- Solid State Physics
Background:
- Volcanic glasses undergo natural crystallization influenced by thermal history.
- Understanding this process is key to predicting material properties and failure mechanisms.
Purpose of the Study:
- To investigate the link between crystallization, magnetic/mechanical properties, and crack formation in trachybasaltic glass.
- To explore how different thermal treatments affect these properties.
Main Methods:
- Differential scanning calorimetry (DSC)
- Raman spectroscopy
- X-ray powder diffraction (XRD)
- Transmission electron microscopy (TEM)
- Vibrating sample magnetometry (VSM)
- Vickers indentation
Main Results:
- Single-step annealing (850°C) rapidly formed nanocrystals, boosting mechanical strength and inducing ferromagnetism.
- Two-step annealing (750°C → 850°C) promoted gradual magnetite formation, enhancing hardness and reducing cracks, with a paramagnetic response.
- Altering crystal content directly influenced hardness, crack resistance, and magnetic behavior.
Conclusions:
- Thermal treatment is a critical factor in controlling the properties of volcanic glasses.
- Natural volcanic heating patterns may drive crystallization, influencing material failure dynamics.
- This research offers insights into the relationship between geological processes and material science.
Related Concept Videos
02:54Trends in Lattice Energy: Ion Size and Charge
26.5K
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:
26.5K
02:42Ionic Crystal Structures
16.8K
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...
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...
16.8K
01:18Other Unique Bacteria
401
Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
401
01:30Magnetism
8.2K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
8.2K
01:25Crystal Growth: Principles of Crystallization
4.7K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
4.7K
01:24Potential Due to a Magnetized Object
757
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
The vector...
757