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Crystals, Volume 10, Issue 6

June 2020 - 129 articles

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Cover Story: The chiral complex cations in [Mn(en)3](NO3)2 and [Co(en)3](NO3)2 spontaneously resolve to form a mixture of conglomerate crystals, crystallizing in the hexagonal space group P6322 at room temperature. Like the previously-reported Ni(II) and Zn(II) congeners, the Mn(II) analogue undergoes a thermally-induced reversible phase transition to enantiomorphic space group P6522 or P6122, resulting in a tripling of the crystallographic c parameter and the emergence of a gentle helicity in the position of the metal atoms. Conversely, a phase transition was not observed for the Co(II) derivative. Synthesis and characterization by a variety of variable-temperature methods, including single-crystal and powder X-ray diffraction, Raman spectroscopy, differential scanning calorimetry, heat capacity, and magnetic susceptibility measurements, are reported. View this paper

Articles (129)

  • Article
  • Open Access
11 Citations
3,214 Views
11 Pages

Dynamics of Radiation Damage in AlN Ceramics under High-Dose Irradiation, Typical for the Processes of Swelling and Hydrogenation

  • Artem L. Kozlovskiy,
  • Dmitriy. I. Shlimas,
  • Inesh E. Kenzhina,
  • Daryn B. Borgekov and
  • Maxim V. Zdorovets

26 June 2020

The use of nitride ceramics, in particular AlN, as structural materials for nuclear power is primarily limited by their resistance to swelling and hydrogenation processes due to the accumulation of poorly soluble helium and hydrogen ions in the struc...

  • Article
  • Open Access
2 Citations
3,097 Views
11 Pages

26 June 2020

We have grown La 1.37 Sr 1.63 Mn 2 O 7 single crystals with a laser-diode-heated floating-zone furnace and studied the crystallinity, structure, and magnetoresistance (MR) effect by in-house X-ray Laue diffraction, X-...

  • Article
  • Open Access
2 Citations
3,322 Views
7 Pages

Unexpected Selective Gas Adsorption on a ‘Non-Porous’ Metal Organic Framework

  • Stuart Beveridge,
  • Craig A. McAnally,
  • Gary S. Nichol,
  • Alan R. Kennedy,
  • Edmund J. Cussen and
  • Ashleigh J. Fletcher

26 June 2020

A metal organic framework Cu(tpt)BF4·¾H2O was synthesized as a potential carbon capture material, with the aim being to exploit the Lewis base interaction of the incorporated ligand functionalities with acidic gas. The material displays...

  • Article
  • Open Access
14 Citations
4,519 Views
10 Pages

26 June 2020

A modified facile method is presented to synthesise quantum-sized zinc oxide nanoparticles within the pores of a mesoporous silica host (SBA-11). This method eliminates the 3 h alcohol reflux and the basic solution reaction steps of zinc acetate. The...

  • Article
  • Open Access
18 Citations
3,439 Views
16 Pages

Microstructures and Mechanical Properties of Nanocrystalline AZ31 Magnesium Alloy Powders with Submicron TiB2 Additions Prepared by Mechanical Milling

  • Haiping Zhou,
  • Chengcai Zhang,
  • Baokun Han,
  • Jianfeng Qiu,
  • Shengxue Qin,
  • Kuidong Gao,
  • Jie Liu,
  • Shuai Sun and
  • Hongbin Zhang

26 June 2020

In this work, nanocrystalline AZ31 magnesium alloy powders, reinforced by submicron TiB2 particles, were prepared via mechanical milling. It was found that TiB2 particles stimulated the fracture and welding of AZ31/TiB2 powders, leading to the accele...

  • Article
  • Open Access
9 Citations
3,709 Views
15 Pages

25 June 2020

Calcium sulfate scale is a typical deposit on the equipment pieces or pipes of an industrial water system. Scale inhibitors could obviously reduce the precipitation of calcium sulfate crystal. The development and research of late-model environmentall...

  • Article
  • Open Access
54 Citations
8,597 Views
21 Pages

Determination of Mechanical Characteristics for Fiber-Reinforced Concrete with Straight and Hooked Fibers

  • Zuzana Marcalikova,
  • Radim Cajka,
  • Vlastimil Bilek,
  • David Bujdos and
  • Oldrich Sucharda

25 June 2020

Fiber-reinforced concrete has a wide application in practice, and many fields of research are devoted to it. In most cases, this is a specific problem, i.e., the determination of the mechanical properties or the test method. However, wider knowledge...

  • Article
  • Open Access
12 Citations
4,260 Views
10 Pages

24 June 2020

Refinement of α-Mg solid solution grains has a significant influence on the improvement of mechanical properties of cast magnesium alloys. In the article, the effects of three modifiers on microstructure and properties of AZ91 magnesium alloy c...

  • Article
  • Open Access
1 Citations
2,874 Views
28 Pages

Properties of Fourier Syntheses and New Syntheses

  • Maria Cristina Burla,
  • Benedetta Carrozzini,
  • Giovanni Luca Cascarano,
  • Carmelo Giacovazzo and
  • Giampiero Polidori

24 June 2020

In this study, the properties of observed, difference, and hybrid syntheses (hybrid indicates a combination of observed and difference syntheses) are investigated from two points of view. The first has a statistical nature and aims to estimate the am...

  • Article
  • Open Access
12 Citations
3,964 Views
13 Pages

Thick β-SiC CVD-Coated SiC Die System for Dry Cold Forging of Metals

  • Tatsuhiko Aizawa,
  • Tomoaki Yoshino,
  • Ko-Ichi Ito and
  • Tatsuya Fukuda

24 June 2020

A thick β-SiC CVD (chemical vapor deposition)-coated SiC device was developed as a new punch and die system for dry, cold forging of pure titanium and austenitic stainless-steel works. This β-SiC coating thickness was 4 mm, enough to make m...

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