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Crystals, Volume 10, Issue 11

November 2020 - 114 articles

Cover Story: Keldyshite-related compounds and materials attract increasing interest because of their outstanding ion-exchange properties and are considered advanced materials, analogs of zeolites. The keldyshite group combines keldyshite Na3H[Zr2(Si2O7)2] and parakeldyshite Na2[Zr(Si2O7)]; synthetic compound Na2[Zr(Si2O7)]∙H2O chemically related to this group. Their crystal structures contain microporous heteropolyhedral frameworks formed by Si2O7-diorthogroups and ZrO6-octahedra with wide channels filled by sodium cations and water molecules. The microporous heteropolyhedral frameworks of all compounds have 2D systems of wide channels suitable for the Na+-ion migration. The crystal structure of keldyshite can be derived from parakeldyshite structure by Na+ + O2‒ ↔ OH‒ + □ substitution, widespread in the post-crystallization process of hyperagpaitic rocks. View this paper.
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Articles (114)

  • Article
  • Open Access
13 Citations
3,509 Views
16 Pages

23 November 2020

Worldwide disposal of multi-tonnage solid waste from coal-burning thermal power plants (TPPs) creates serious environmental and economic problems, which necessitate the recovery of industrial waste in large quantities and at commercial prices. Fly as...

  • Article
  • Open Access
2 Citations
2,734 Views
8 Pages

A Facile and Rapid Fabrication of Multifunctional Color-Tuned Titanium

  • Jihun Choi,
  • Soyeon Park,
  • Sangmin Jeon and
  • Changyong Yim

23 November 2020

In this article, a strategy for the fabrication of color-tuned titanium using a torch was developed. The torch was used to manufacture a layer of titanium dioxide on titanium substrates. The reaction time and requirements were reduced compared to the...

  • Article
  • Open Access
21 Citations
3,383 Views
14 Pages

Microstructural Characterization and Corrosion-Resistance Behavior of Dual-Phase Steels Compared to Conventional Rebar

  • Hany S. Abdo,
  • Asiful H. Seikh,
  • Biplab Baran Mandal,
  • Jabair A. Mohammed,
  • Sameh A. Ragab and
  • Mohamed S. Abdo

23 November 2020

Dual-phase (DP) steels consist of a ferritic matrix dispersed with some percentage of martensite, which gives the material a good combination of strength and ductility, along with the capacity to absorb energy and enhanced corrosion protection proper...

  • Article
  • Open Access
8 Citations
3,696 Views
14 Pages

Chiral Conducting Me-EDT-TTF and Et-EDT-TTF-Based Radical Cation Salts with the Perchlorate Anion

  • Nabil Mroweh,
  • Pascale Auban-Senzier,
  • Nicolas Vanthuyne,
  • Elsa B. Lopes,
  • Manuel Almeida,
  • Enric Canadell and
  • Narcis Avarvari

23 November 2020

Introduction of chirality in the field of molecular conductors has received increasing interest in recent years in the frame of modulation of the crystal packing, and hence conducting properties, with the number of stereogenic centers and absolute co...

  • Article
  • Open Access
16 Citations
4,129 Views
12 Pages

22 November 2020

In the preparation of CuCr alloy using the self-propagating high-temperature synthesis (SHS)-metallurgy method, the dissolution of alumina in molten slag has an important influence in two key steps: aluminum thermal reduction and slag refining. In th...

  • Article
  • Open Access
6 Citations
3,797 Views
16 Pages

Experimental and Modeling Analysis of Holey Graphene Electrodes for High-Power-Density Li-Ion Batteries

  • Yu-Ren Huang,
  • Cheng-Lung Chen,
  • Nen-Wen Pu,
  • Chia-Hung Wu,
  • Yih-Ming Liu,
  • Ying-Hsueh Chen,
  • Meng-Jey Youh and
  • Ming-Der Ger

22 November 2020

The performances of lithium-ion batteries (LIBs) using holey graphene (HGNS) as the anode material are compared with those using non-holey graphene (GNS). The effects of graphene holes on ion transport are analyzed with a combined experiment/modeling...

  • Article
  • Open Access
9 Citations
3,370 Views
12 Pages

Crystal Chemistry of Alkali–Aluminum–Iron Sulfates from the Burnt Mine Dumps of the Chelyabinsk Coal Basin, South Urals, Russia

  • Andrey A. Zolotarev,
  • Sergey V. Krivovichev,
  • Margarita S. Avdontceva,
  • Vladimir V. Shilovskikh,
  • Mikhail A. Rassomakhin,
  • Vasiliy O. Yapaskurt and
  • Igor V. Pekov

22 November 2020

Technogenic steklite, KAl(SO4)2, and unnamed mineral phase (K,Na)3Na3(Fe,Al)2(SO4)6 from burnt dumps of the Chelyabinsk Coal Basin have been investigated by single-crystal X-ray diffraction and electron microprobe analysis. Steklite is trigonal, spac...

  • Communication
  • Open Access
19 Citations
4,269 Views
12 Pages

21 November 2020

The Ni content is a crucial factor for the development of γ′-strengthened Co-based superalloys and some studies have systematically addressed its influence on various properties in model superalloys. In this paper, we report for the first...

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Crystals - ISSN 2073-4352