A new method for the identification and quantification of magnetite–maghemite mixture using conventional X-ray diffraction technique

We present a cost- and time-efficient method for the controlled preparation of single phase La(IO3)3 nanoparticles via a simple soft-chemical route, which takes a matter of hours, thereby providing an alternative to the common hydrothermal method, which takes days. Nanoparticles of pure α-La(IO3)3 and pure δ-La(IO3)3 were synthesised via the new method depending on the source of iodate ions, thereby demonstrating the versatility of the synthesis route. The crystal structure, nanoparticle size-dispersal, and chemical composition were characterised via angle- and energy-dispersive powder X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy.

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Identification and Quantification of Phases in Steels by X Ray Diffraction using Rietveld Refinement

10.5772/intechopen.91823 ◽

2020 ◽

Author(s):

Adriana da Cunha Rocha ◽

Gabriela Ribeiro Pereira

Keyword(s):

Rietveld Refinement ◽

X Ray Diffraction ◽

X Ray ◽

Identification And Quantification

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Synthesis of an Oxaspirolactone Intermediate for the Synthesis of Spirolides

Australian Journal of Chemistry ◽

10.1071/ch00111 ◽

2000 ◽

Vol 53 (10) ◽

pp. 845 ◽

Cited By ~ 11

Author(s):

Margaret A. Brimble ◽

Fares A. Fares ◽

Peter Turner

Keyword(s):

Carboxylic Acid ◽

Single Crystal ◽

Building Block ◽

New Method ◽

X Ray Diffraction ◽

Orthorhombic Space Group ◽

Space Group ◽

X Ray

A new method has been established for the preparation of C 2-oxidized 5,5-spiroacetals, which are key intermediates for the synthesis of the bis-spiroacetal moiety of the spirolides. A bridged orthoester was used as a masked carboxylic acid in the preparation of these bicyclic oxaspirolactones. The synthesis of chiral lactone (12), a building block for the synthesis of the spirolides, is also reported. The two chiral centres in lactone (12) were assembled by addition of a chiral crotyl borane to an aldehyde. The structure of lactone (12) was determined by single-crystal X-ray diffraction; orthorhombic space group P212121 (No. 19), a 12.437(2), b 23.881(4), c 7.545(1) Å, V 2240.9(5) Å3, R(F) 0.0460, and Rw(F) 0.0458.

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Formation of ultrafine powders of binary alloy systems by plasma jet

Journal of Materials Research ◽

10.1557/jmr.1998.0210 ◽

1998 ◽

Vol 13 (6) ◽

pp. 1511-1516 ◽

Cited By ~ 3

Author(s):

M. Umemoto ◽

M. Udaka ◽

K. Kawasaki ◽

X. D. Liu

Keyword(s):

Electron Microscope ◽

Binary Alloy ◽

Transmission Electron Microscope ◽

Ultrafine Particles ◽

Plasma Jet ◽

New Method ◽

Ultrafine Powders ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron

Recently, a new method, i.e., a plasma jet method, was developed in our lab for the production of ultrafine powders. In the present work, we investigated the formation of binary Al–Fe, Al–Si, Fe–Si, Al–Cu, Al–Ni, Ni–Ti, Fe–Cu, and Fe–Ti ultrafine powders using this method. Premixed pure elemental powders of various compositions of Al–Fe, Al–Si, Fe–Si, Al–Cu, Al–Ni, Ni–Ti, Fe–Cu, and Fe–Ti were used as starting materials. These premixed powders were injected into the plasma jet of Ar–N2 working gas to form ultrafine powders. The obtained ultrafine powders were characterized by x-ray diffraction and transmission electron microscope to check the microstructures of ultrafine particles.

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Noncrystalline Solids Prepared by Compacting Nanometer — Sized Particles

MRS Proceedings ◽

10.1557/proc-195-617 ◽

1990 ◽

Vol 195 ◽

Author(s):

J. Weissmüller ◽

J. Jing ◽

A. Krämer ◽

R. Birringer ◽

U. Gonser ◽

...

Keyword(s):

Thermal Stability ◽

Atomic Structure ◽

Short Range ◽

Short Range Order ◽

Amorphous Solids ◽

Range Order ◽

New Method ◽

X Ray Diffraction ◽

X Ray

ABSTRACTA new method of preparing amorphous solids is presented. X-ray diffraction, thermal stability and Mgssbauer spectroscopy give evidence for an atomic structure with reduced short–range order in Si75Auz5 and Pd72FeloSil8 alloys prepared by this method.

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Soluble Pyridine Complexes Of The Ternary Gallium(III) Chalcogenide Halides (GaEX)3, With E = S, Se And X = Cl, Br

Zeitschrift für Naturforschung B ◽

10.1515/znb-2001-0803 ◽

2001 ◽

Vol 56 (8) ◽

pp. 711-718 ◽

Cited By ~ 4

Author(s):

Stefan D. Nogai ◽

Annette Schier ◽

Hubert Schmidbaur

Keyword(s):

Single Crystal ◽

Molecular Complexes ◽

Membered Ring ◽

New Method ◽

X Ray Diffraction ◽

X Ray ◽

Pyridine Ligands ◽

Ring Molecules ◽

Gallium Metal ◽

Convenient Preparation

The four ternary gallium(III) chalcogenide halides GaEX with E = S, Se and X = Cl, Br can be prepared a) from the binary gallium(III) chalcogenides Ga2E3 and halides Ga2X6, b) from gallium(I) tetrahalogallates(III) GafGaX4] and the chalcogen E, and c) from gallium metal and the dichalcogen dihalides E2X2. The new method c) was shown to be the most convenient preparation. The products are readily soluble in pyridine to give trinuclear molecular complexes [GaEX·Py]3 which are not volatile without decomposition, but can be purified by crystallization. The structures have been determined by single crystal X-ray diffraction techniques. The two chlorides are isostructural and show twisted tub-form six-membered ring molecules with the pyridine donors in axial positions. The two bromides are also isostructural, but with the pyridine ligands in two axial and one equatorial positions

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