FeS2 (Pyrite) | PVEducation
It has a crystal structure that resembles the fluorite structure. Iron disulfide has a yellow-brass, metallic luster that is sometimes incorrectly recognized as gold. ... Specifying targets of future research in …
First-principles study of high-pressure stability, structure, …
The pressure-dependent elastic properties of the Fe–S system are important to understand the dynamic properties of the Earth's interior. We have therefore undertaken a first-principles study of the structural and elastic properties of FeS2 polymorphs under high pressure using a method based on plane-wave pseudopotential density function …
Accurate Prediction of Band Structure of FeS2: A Hard Quest …
In the present work, we investigate the electronic band structures of the pyrite and marcasite polymorphs of FeS 2 by applying the state-of-the-art all-electron …
Crystalline structure and magnetic properties of pyrite FeS 2
The refined XRD patterns confirmed that the crystalline structure of FeS2 was cubic (Pa-3 space group) with lattice constant a0 = 5.417 Å. The temperature dependence of the zero-field-cooled and ...
Pyrite (FeS2)
Pyrite (FeS2) Formula: FeS 2; Molecular weight: 119.975; CAS Registry Number: ; Information on this page: IR Spectrum; References; Notes; Other data available: Condensed phase thermochemistry data; Data at other public NIST sites: X-ray Photoelectron Spectroscopy Database, version 5.0; Options: Switch to calorie-based …
Raspberry-like hierarchical structure FeS2 decorated by dual …
Further structure characterization was performed by Raman spectroscopy, and the result is shown in Fig. 1 b. The two stronger Raman peaks at ∼1360 cm −1 and ∼1580 cm −1 of FeS 2 @C/rGO material correspond to the defect-activated disordered D-band and the ordered graphic G-band of carbon, respectively, confirming the carbon …
Nano-Sized Iron Sulfide: Structure, Synthesis, Properties, …
Nano-sized iron sulfides have attracted intense research interest due to the variety of their types, structures, and physicochemical properties. In particular, nano-sized iron sulfides exhibit enzyme-like activity by mimicking natural enzymes that depend on an iron-sulfur cluster as cofactor, extending their potential for applications in biomedicine. The present …
Raspberry-like hierarchical structure FeS2 decorated by dual …
Pyrite (FeS2) is one of the potential candidates for advanced rechargeable Li-ion batteries (LIBs) owing to its inherent capacity (849 mAh g−1), environmental friendliness, and abundant natural ...
Enhanced thermoelectric power generation performance of …
FeS and FeS2 phases are formed at different reaction duration and are listed in Table 1. In addition, the highest crystallinity was observed for 48h sample. ... The structure and morphology of as-prepared iron sulphide samples at different reaction durations were investigated through scanning electron microscope analysis, ...
Complete first-order Raman spectra of the pyrite structure …
DOI: 10.1016/0022-3697(83)90124-5 Corpus ID: 96696641; Complete first-order Raman spectra of the pyrite structure compounds FeS2, MnS2 and SiP2 @article{Vogt1983CompleteFR, title={Complete first-order Raman spectra of the pyrite structure compounds FeS2, MnS2 and SiP2}, author={H. Vogt and Tapan …
Preparation and densification of bulk pyrite, FeS2
Abstract. A favourable electronic structure, together with a high abundance of pyrite (FeS 2) in the Earth's crust, make this sulfide a promising material for thermoelectric applications. However, the experimental work published to date underlines a challenging scenario, with FeS 2 presenting systematically small power factors.
Is pyrite (FeS₂) an ionic or a covalent compound?
I have searched all over the web and found a lot of diverse explanations, but none of them are concluding exactly whether $ce{FeS2}$ (solid - pyrite) is a covalent or an ionic compound. From …
properties of pyrite FeS2
The refined XRD patterns confirmed that the crystalline structure of FeS2 was cubic (Pa-3 space group) with lattice constant a0 = 5.417 Å. The temperature dependence of the zero-field-cooled and ...
First-principles study of high-pressure stability, structure, …
Mol Simul 22(1):31–37 Sithole HM, Ngoepe PE, Wright K (2003) Atomistic simulation of the structure and elastic properties of pyrite (FeS2) as a function of pressure. Phys Chem Miner 30(10):615–619 Spagnoli D, Refson K, Wright K, Gale JD (2010) Density functional theory study of the relative stability of the iron disulfide polymorphs pyrite ...
The preparation of single crystals of FeS2, CoS2, and NiS2 …
Single crystals of FeS 2, CoS 2, and NiS 2 with the pyrite structure were prepared by Cl 2 transport in various temperature gradients. Several different methods were employed. ... FeS2 was obtained as fairly large single crystals with gradients of about 60 . Fig. I shows some crystals that were grown in a gradient from 715 --j 655 .
Structure adapting of bulk FeS2 micron particles and the …
The resulted FeS 2-PANI product was characterized first by XRD to identify the crystal structure.As shown in Fig. 2 a, all the diffraction peaks of bare FeS 2 and FeS 2-PANI can be assigned to the standard XRD patterns of pyrite FeS 2 (JCPDS Card no. 42–1340) with the Pa3 space group[28, 29].Owing to the amorphous character of PANI, …
Iron(II) Sulfide (FeS)
Iron (II) sulfide, or ferrous sulfide, is a compound formed by iron and sulfur in a 1:1 ratio, creating a crystal lattice where these atoms alternate. This structure is reminiscent of a grid made up of tiny balls, with each iron atom closely surrounded by sulfur atoms, facilitating a solid bond. This arrangement results in a solid material ...
Pyrite Mineral Data
FeS2 : Composition: Molecular Weight = 119.98 gm Iron 46.55 % Fe Sulfur 53.45 % S _____ 100.00 % : Empirical Formula: Fe 2+ S 2: Environment: Sedimentary, magmatic, metamorphic, and hydrothermal deposits. ... Crystal Structure: Mouse drag1 - LMB Manipulate Structure drag2 - RMB Resize/Rotate Keyboard S - Stereo Pair on/off H - …
Evaluating structure selection in the hydrothermal growth of FeS2 …
Surface thermodynamics. We first evaluate the relative energies of the various crystallographic facets in pyrite and marcasite and their tendency to adsorb OH − and H 3 O + ions, as given in ...
Structure-designed synthesis of FeS2@C …
Tuning the morphology and structure at nanoscale and applying a higher cut-off voltage are essential to address this issue. Here, a facile etching method coupled with a novel sulfidation-in-nanobox …
Raspberry-like hierarchical structure FeS2 decorated by dual …
Semantic Scholar extracted view of "Raspberry-like hierarchical structure FeS2 decorated by dual-carbon framework as high-performance cathode for rechargeable lithium batteries" by Jie Wang et al.
Dual regulation of crystal structure and purity of Ti
The rationale behind the anomalous crystal structures in Ti 2 SC has been explicated. • The determinants governing the growth of individual crystal planes in Ti 2 SC have been identified. • Highly oriented structure Ti 2 SC was synthesized for the first time. • Two kinds of Ti 2 SC with purity greater than 99 wt% were successfully prepared.
The FeS 2 (P1) Structure
The FeS 2 (P1) Structure. You can now. see the structure from several perspectives; examine the structure with an external viewer; or; download the …
(PDF) ELECTRONIC STRUCTURES OF FeS AND …
However,a completepicture of the FeS and FeS2 band structures could not be derived from these results due to the fact that the Fe L3 (2p3/2+ 3d,4s) absorption edges were not investigated due to non-availabilityof …
Grape-cluster-like Hierarchical Structure of FeS2 …
@article{Liu2023GrapeclusterlikeHS, title={Grape-cluster-like Hierarchical Structure of FeS2 Encapsulated in Graphitic Carbon as Cathode Material for High-Rate Lithium Batteries}, author={Y. Liu and Ha Cheol Ju and Kwon‐Koo Cho and Hyojun Ahn and Jou‐Hyeon Ahn}, journal={Applied Surface Science}, year={2023}, url={https://api ...
Symmetry-Defying Iron Pyrite (FeS2) Nanocrystals through …
Iron pyrite (fool's gold, FeS2) is a promising earth abundant and environmentally benign semiconductor material that shows promise as a strong and broad absorber for photovoltaics and high energy ...
Pyrite FeS2 nanostructures: Synthesis, properties and applications
The structure of cubic FeS 2 is similar to that of NaCl. Namely, Fe 2+ and S 2 −2 displace the lattice. Synthesis of FeS 2 nanostructures. ... (FeS2) can be explored to overcome these issues. FeS2 exhibits high optical absorption, high carrier density, suitable band gap and advantage of non-toxicity and earth abundancy [12]. ...
Recent Progress on Pyrite FeS2 Nanomaterials for Energy …
The review involves overview of FeS2, also outlining the structure, basic magnetic, optical and transport properties. Then the comprehensive study regarding …
Unraveling the Reaction Mechanism of FeS2 as a Li-Ion …
Iron pyrite (FeS2) is a promising lithium-ion battery cathode material because of its low cost and ultrahigh energy density (1671 Wh kg–1). However, its reaction mechanisms are still controversial. In this work, we find that different from the conventional belief that an intermediate phase Li2FeS2 is formed followed by Fe/Li2S composites at …
Graphene supported FeS2 nanoparticles with sandwich structure …
To observe the microstructure and morphology of the as-prepared FeS 2 @C-rGO, SEM and TEM were carried out. As shown in Fig. 2 a, MIL-100(Fe) nanoparticles with an average diameter of 100 nm were uniformly dispersed on the surface of the rGO sheets. Upon calcination, the FeS 2 @C-rGO inherited the structure from the precursor …
mp-226: FeS2 (cubic, Pa-3, 205)
FeS2 is Pyrite structured and crystallizes in the cubic Pa-3 space group. The structure is three-dimensional. Fe3+ is bonded to six equivalent S+1.50- atoms to form corner …
Dual-salt strategy tuning the solvation structure to achieve …
The phase structure was recorded by X-ray powder diffraction (XRD, Bruker D8 Advance) with a Cu Kα (λ = 1.5406 Å) irradiation source. The electrode thicknesses were measured by an optical microscope (OM, YM520R). The ion conductivity of electrolytes was measured by an ionic conductivity meter (Model DDS-307 A, Shanghai …
Redetermined crystal structure of Fe S2 (pyrite)
Frontiers in Chemistry. 2021. TLDR. This work indicates that accurate prediction of electronic band structure of FeS2 poses a stringent test on state-of-the-art first-principles approaches, and the G 0 W 0 method based on semi-local approximation performs well for this difficult system if it is practiced with well-converged numerical accuracy.
Construction of core–shell FeS2@ZnIn2S4 hollow hierarchical structure S …
The hollow structure exhibits many advantages including more active sites, a better reflection of light and a large specific surface area [30], [31], [32]. It can be speculated that the integration of morphological design and photothermal-assisted photocatalytic S-Scheme heterojunction is expected to enhance the photocatalytic …
Recent Progress on Pyrite FeS2 Nanomaterials for Energy …
The review involves overview of FeS2, also outlining the structure, basic magnetic, optical and transport properties. Then the comprehensive study regarding modification of FeS2 nanostructures is also illustrated. The well synthesized FeS2 nanomaterials have been used for basic building blocks of functional systems and their …
Structure-designed synthesis of FeS2@C yolk–shell …
Pyrite (FeS2) is an attractive anode material for sodium-ion batteries (SIBs) with a high theoretical capacity of 894 mAh g−1. However, its practical application is greatly hindered by the rapid capacity fading caused by the large volume expansion upon sodiation. Tuning the morphology and structure at nanosc
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