Results 61 to 70 of about 17,786 (291)

Gorceixite from Catalão, Goiás, Brazil: Rietveld Crystal Structure Refinement [PDF]

Geologia USP. Série Científica, 2007
Gorceixite is an abundant aluminum phosphate in Brazilian laterite phosphate ores and is one of the most importantgangue minerals. Catalão I mine, Goiás, Brazil, one of the biggest phosphate mines in Brazil, contains great amounts ofgorceixite, whose ...
Viviane Carillo Ferrari, Maria Cristina Motta de Toledo, Daniel Atencio   +2 more
doaj  

Rietveld refinement of a natural cobaltian mansfieldite from synchrotron data

Acta Crystallographica Section E, 2009
A structural refinement of a natural sample of a Co-bearing mansfieldite, AlAsO4·2H2O [aluminium orthoarsenate(V) dihydrate], has been performed based on synchrotron powder diffraction data, with 5% of the octahedral Al sites replaced by Co ...
Giovanni Pratesi, Matteo Zoppi
doaj   +1 more source

Single Crystals of Perylene Diimide‐Based Two‐Dimensional Covalent Organic Frameworks

Advanced Materials, EarlyView.
Synthesizing extended crystals of two‐dimensional covalent organic frameworks (2D COFs) has remained a major challenge. Here, we report a high‐temperature double‐modulator strategy that provides access to new perylene diimide (PDI)‐based COFs with crystal sizes of up to 50 µm.
Ling Zhang, Zixuan Chen, Lukas Mühlnickel, Lukas Sporrer, Jakub D. Jasinski, Megha Koottungal, Kevin Synnatschke, Paul‐Felix Jordan, Silvia Paasch, Eike Brunner, Zhehao Huang, Alexey Chernikov, Florian Auras   +12 more
wiley   +1 more source

Rietveld and Impedance Analysis of Cold and Hot Rolled Duplex and Lean Duplex Steels for Application in Paper and Pulp Industry [PDF]

Materials Research, 2016
In this study, X-Ray Diffraction (XRD) and Rietveld Refinement were performed to identify and quantify the ferrite and austenite phase of cold and hot rolled duplex stainless steels (UNS S31803) and lean duplex stainless steels (UNS S32304 ...
Luiza Esteves, Paulo Renato Perdigão Paiva, Adolfo Kalergis do Nascimento Viana, Vanessa de Freitas Cunha Lins   +3 more
doaj   +2 more sources

A Family of Sodium Solid‐State Electrolytes Based on the NaGaxAl1‐xCl4 Solid Solution

Advanced Materials Interfaces, EarlyView.
ABSTRACT Sodium‐based metal chloride solid electrolytes are promising for sodium solid‐state batteries due to their excellent oxidation stability, which, as shown for Li halides, can coexist with high ionic conductivity. To explore cationic substitution effects, we synthesized NaGaxAl1‐xCl4 (0 ≤ x ≤ 1) via ball milling and investigated structural and ...
Hao Guo, Matteo Bianchini
wiley   +1 more source

Rapid Analysis of Feldspar by X-ray Diffractometry Rietveld Refinement Method

Yankuang ceshi, 2017
The content of minerals in feldspar can be calculated by chemical analytical results, but the analytical process is long and the calculation process is complex.
RAN Jing, DU Gu, WANG feng-yu
doaj   +1 more source

The Influence of Mesoscale Particle Structure on the Electrode Degradation and Resultant Electrochemistry of Lithium Ion Cells With Nickel Rich Lithium Nickel Manganese Cobalt Oxide Positive Electrodes

Advanced Materials Technologies, EarlyView.
Milled polycrystalline NMC811 cathode (MPC NMC) with smaller secondary particle and higher surface area had 1) greater cathode tortuosity, 2) reduced surface Ni on the cycled MPC cathodes consistent with surface reconstruction, and 3) increased Ni deposition from cathode‐anode crosstalk, manifesting in lower functional capacity and higher impedance ...
Edelmy J. Marin Bernardez, Andrew Nicoll, David J. Arnot, Armando Rodriguez Campos, Patrick J. Barry, Marie F. Millares, Cynthia Huang, Melissa A. Guercio, Grace K. Dono, Alexis Pace, Xianghui Xiao, Cherno Jaye, Conan Weiland, Jianming Bai, Hui Zhong, Michael Drakopoulos, Zhong Zhong, Nghia T. Vo, Xiao Tong, Esther S. Takeuchi, Amy C. Marschilok, Shan Yan, Kenneth J. Takeuchi   +22 more
wiley   +1 more source

Mineralogical study of phosphate rocks by quantitative rietveld refinement

Open Ceramics
Phosphorites from the Kodjari deposits of Burkina Faso are composite rocks with a fine-grained matrix phase and dispersed larger grains. Chemical analysis by XRF revealed a CaO content of 35.98–41.33 wt% and a P2O5 content of 26.85–30.75 wt%.
Jean-Baptiste Zoungrana, Brahima Sorgho, Corneille Bakouan, Saga Sawadogo, Regie Dimanche Ouedraogo, Boubié Guel, Philippe Blanchart   +6 more
doaj   +1 more source

Bayesian approach to the Rietveld refinement of Poisson-distributed powder diffraction data

, 2010
The Rietveld method is based on a weighted least-squares fit of a model diffraction pattern to the step-scan data of a complete experimental X-ray or neutron diffraction pattern.
J. Bergmann, T. Monecke
core   +1 more source

High‐Power Rapid Laser‐Induced Synthesis of Multi‐functional Cobalt Metal‐Organic Framework With an Unprecedented Synthesis Efficiency

Advanced Materials Technologies, EarlyView.
Laser‐assisted synthesis enables rapid (within 1 h) and high‐yield (≥90%) production of Co‐MOFs with mesoporous structures, tunable magnetic and optical properties, and efficient adsorption of N2, CH4, and CO2 for low‐energy gas separation. DFT calculations elucidate the electronic structure and adsorption behavior.
Saliha Mutlu, Bülend Ortaç, Ali Karatutlu, Taylan Gorkan, Engin Durgun, Dilek Soyler, Saniye Soylemez, Jelena Lillepäg, Volkan Filiz, Nergis Arsu, Sevil Savaskan Yilmaz   +10 more
wiley   +1 more source