Results 11 to 20 of about 5,714 (305)

Copper-manganese-zinc spinels in zeolites: study of EMR spectra

Nukleonika, 2015
The aim of this study is the application of electron magnetic resonance (EMR) spectroscopy to determine the interactions between NaY and HY zeolites and Cu-Mn-Zn spinels loaded onto the zeolite surfaces.
Decyk Piotr, Więckowski Andrzej B., Najder-Kozdrowska Lidia, Bilkova Iveta   +3 more
doaj   +3 more sources

Inclusions, Chemical Composition, and Spectral Characteristics of Pinkish-Purple to Purple Spinels from Mogok, Myanmar

Crystals
With the increasing market demand for spinels of various colors, purple spinel—long regarded as a symbol of nobility—has attracted growing attention. In this study, pinkish-purple to purple spinels from the Mogok region of Myanmar were systematically ...
Danyu Guo, Geng Li, Liqun Weng, Meilun Zhang, Fabian Dietmar Schmitz   +4 more
doaj   +2 more sources

Ferric iron in chrome-bearing spinels: implications for microprobe correction procedures

, 2023
We investigated the compositions of a suite of 361 chrome-bearing spinels from spinel peridotites, ophiolitic mantle chromitites and from layered igneous intrusions in which the Fe2+/Fe3+ ratio has been determined by Mössbauer spectroscopy.
Adetunji, J., Hugh Rollinson, Rollinson, H., Jacob Adetunji   +3 more
core   +1 more source

Probing magnetic order in EELS of chromite spinels using both multiple scattering (FEFF8.2) and DFT (WIEN2k) [PDF]

, 2010
The electron energy loss near edge structure on the O K-edge from chromite spinels contains fine structure from the hybridisation of the O p-orbitals and the Cr d-orbitals.
McComb, D.W., Eustace, D.A., Craven, A.J.   +2 more
core   +1 more source

Magnetoelectric and multiferroic properties of spinels

, 2021
In the last two decades, significant progress has been made in combining ferroelectricity and magnetism in the same material. Usually, magnetism and ferroelectricity were thought of as independent phenomena.
N. V. Ter-Oganessian, Sundaresan, Athinarayanan, Ter-Oganessian, N. V., Athinarayanan Sundaresan   +3 more
core   +1 more source

Trace Elements in Chromian Spinels from Four Siberian Kimberlites [PDF]

, 2022
We analysed the major, minor and trace elements chemistry of forty-two Cr-spinels from four Siberian kimberlites. They showed a wide range in Mg# (Mg/(Mg + Fe2+); 0.42–0.78) and Cr# (Cr/(Cr + Al); 0.32–0.92) and a common trend of increasing ...
Marco Venier, Maurizio Petrelli, Vanni Lughi, Nikolay V. Sobolev, Luca Ziberna, Alla Logvinova, Davide Lenaz, Gianluca Turco, Francesco Princivalle   +8 more
core   +1 more source

Spinels in meteorites: Observation using Mössbauer spectroscopy [PDF]

, 2019
In this mini-review, we consider the results of various meteorite studies using Mössbauer spectroscopy with a high velocity resolution in order to reveal the minor spectral components related to spinels such as chromite, hercynite, magnesiochromite ...
Chukin, A. V., Felner, I., Oshtrakh, M. I., Maksimova, A. A., Michael I. Oshtrakh, Alevtina A. Maksimova, Andrey V. Chukin, Israel Felner   +7 more
core   +1 more source

Ab-initio computations of CaV2S4 and CaMn2S4 spinels for spintronics and energy storage system applications

Journal of Materials Research and Technology, 2020
Having ferromagnetism capabilities and energy storage capacity, CaV2S4 and CaMn2S4 spinels are interesting materials owing to their potential applications in spintronics applications.
Asif Mahmood, Shahid M. Ramay, Waheed Al-Masry, Ateyah A. Al-Zahrani, Najib Y.A. Al-Garadi   +4 more
doaj   +1 more source

Use of dilatometer to screen refractory raw materials

International Journal of Ceramic Engineering & Science, 2022
Sudden shortage of a particular raw material due to freight disruptions, competitive market, and COVID restrictions have frequently forced the refractory industry to rapidly develop alternative formulations using available low‐cost materials.
Somnath Mandal, Manoj K. Mahapatra
doaj   +1 more source

MINERALOGY AND GENESIS OF ULTRAMAFIC ROCKS FROM THE KURTUSHIBA OPHIOLITE BELT (WESTERN SAYAN) [PDF]

Минералогия, 2022
The studies of minerals and melt inclusions in ultramafic rocks of the Kurtushiba ophiolite belt (Western Sayan) allowed us to establish the conditions of mineral-forming processes during their formation.
V.A. Simonov, A.I. Chernyshov, A.V. Kotlyarov   +2 more
doaj   +1 more source