SOLID SOLUTIONS OF HYDROGEN PEROXIDE AND WATER

1940 ◽  
Vol 18b (2) ◽  
pp. 66-73 ◽  
Author(s):  
P. A. Giguère ◽  
O. Maass
Keyword(s):  
Crystal Structure ◽  
Hydrogen Peroxide ◽  
Experimental Method ◽  
Solid Solutions ◽  
Mother Liquor ◽  
Solid Phase ◽  
Complete Removal ◽  
Special Care ◽  
Ample Evidence

An attempt has been made to determine the exact composition of the first crystals that separate out on freezing solutions of hydrogen peroxide and water of various concentrations. Special care was taken to ensure complete removal of any liquid wetting the solid phase. In all cases the crystals were found to contain both components and in proportions usually different from those in the mother-liquor. Owing to the limitations of the experimental method used, the results are only approximate, but they afford ample evidence for the existence of solid solutions. The possibility of hydrogen peroxide forming solid solutions with water is discussed from the standpoint of the crystal structure of both components.

scholarly journals Crystal structure and magnetic characteristics of solid solutions Ni1–xCrxMnSb

2021 ◽  
Vol 66 (3) ◽  
pp. 263-269
Author(s):  
G. S. Rimskiy ◽  
K. I. Yanushkevich ◽  
A. V. Rutkauskas
Keyword(s):  
Crystal Structure ◽  
Phase Transformation ◽  
Curie Temperature ◽  
Solid Solutions ◽  
Magnetic Order ◽  
Solid Phase ◽  
Magnetic Characteristics ◽  
Specific Magnetization ◽  
Magnetic Studies ◽  
Magnetic Disorder

The results of an experiment on studying the features of the crystal structure and magnetic studies of substitutional solid solutions of the Ni1–xCrxMnSb system (0 m х m 0.2) are presented. It was found that an increase in the concentration of chromium in solid solutions does not lead to significant changes in the size of the unit crystal cell. It was found that solid-phase quenching can be used to expand the limit of chromium solubility in Ni1–xCrxMnSb solid solutions. The temperature and field dependences of the specific magnetization of the synthesized compositions have been studied. It was found that the substitution of chromium for nickel in the NiMnSb compound leads to a decrease in the temperature of the “magnetic order – magnetic disorder” phase transformation with an increase in the concentration x from 0 to 20 mol.%. The values of specific magnetization and Curie temperature of hardened hard rasters are higher than those of slowly cooled ones. The results obtained contribute to the creation of a physical basis for the elemental base of spintronics.

HYDROGEN PEROXIDE AND ITS ANALOGUES: II. PHASE EQUILIBRIUM IN THE SYSTEM HYDROGEN PEROXIDE – WATER

1951 ◽  
Vol 29 (2) ◽  
pp. 123-132 ◽  
Author(s):  
William T. Foley ◽  
Paul A. Giguère
Keyword(s):  
Hydrogen Peroxide ◽  
Phase Equilibrium ◽  
Solid Solutions ◽  
Freezing Point ◽  
Platinum Resistance Thermometer ◽  
Platinum Resistance ◽  
Radioactive Tracers ◽  
Resistance Thermometer ◽  
Pure Solution

A precision freezing point apparatus with platinum resistance thermometer was used to investigate the system hydrogen peroxide – water over the whole concentration range. The freezing point of the purest sample of hydrogen peroxide obtained by repeated fractional crystallizations of a large quantity of 99.6% pure solution was found to be −0.461°C; that of the dihydrate was −52.10°C. The two eutectics occur at concentrations of 45.2% and 61.2% H2O2 and at temperatures of −52.4° and −56.5°C. respectively. Contrary to what has been reported previously, water and hydrogen peroxide do not form solid solutions together. This was proved conclusively by applying the technique of radioactive tracers to the 'wet residue' method of Schreinemakers.

Optical Waveguide Formation by Ion Implantation of Ti or Ag

1988 ◽  
Vol 100 ◽  
Author(s):  
D. B. Poker ◽  
D. K. Thomas
Keyword(s):  
Ion Implantation ◽  
Concentration Profile ◽  
Optical Waveguides ◽  
Annealing Temperature ◽  
Solid Phase ◽  
Effective Means ◽  
Complete Removal ◽  
Solid Phase Epitaxy ◽  
Annealing Temperatures ◽  
Residual Damage

ABSTRACTIon implantation of Ti into LINbO3 has been shown to be an effective means of producing optical waveguides, while maintaining better control over the resulting concentration profile of the dopant than can be achieved by in-diffusion. While undoped, amorphous LiNbO3 can be regrown by solid-phase epitaxy at 400°C with a regrowth velocity of 250 Å/min, the higher concentrations of Ti required to form a waveguide (∼10%) slow the regrowth considerably, so that temperatures approaching 800°C are used. Complete removal of residual damage requires annealing temperatures of 1000°C, not significantly lower than those used with in-diffusion. Solid phase epitaxy of Agimplanted LiNbO3, however, occurs at much lower temperatures. The regrowth is completed at 400°C, and annealing of all residual damage occurs at or below 800°C. Furthermore, the regrowth rate is independent of Ag concentration up to the highest dose implanted to date, 1 × 1017 Ag/cm2. The usefulness of Ag implantation for the formation of optical waveguides is limited, however, by the higher mobility of Ag at the annealing temperature, compared to Ti.

scholarly journals Hydrogen peroxide‐mediated conversion of coproheme to heme b by HemQ—lessons from the first crystal structure and kinetic studies

FEBS Journal ◽  
2016 ◽  
Vol 283 (23) ◽  
pp. 4386-4401 ◽  
Author(s):  
Stefan Hofbauer ◽  
Georg Mlynek ◽  
Lisa Milazzo ◽  
Dominic Pühringer ◽  
Daniel Maresch ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Peroxide ◽  
Kinetic Studies

scholarly journals The crystal structure of hydrogen peroxide

1951 ◽  
Vol 4 (1) ◽  
pp. 15-20 ◽  
Author(s):  
S. C. Abrahams ◽  
R. L. Collin ◽  
W. N. Lipscomb
Keyword(s):  
Crystal Structure ◽  
Hydrogen Peroxide

Structure and hydration of polyvinylpyrrolidone-hydrogen peroxide

2021 ◽  
Author(s):  
Luke I. Chambers ◽  
Dimitrii S. Yufit ◽  
Mark A Fox ◽  
Osama Musa ◽  
Jonathan W Steed
Keyword(s):  
Crystal Structure ◽  
Hydrogen Peroxide ◽  
Commercially Important

The structure of the commercially important polyvinylpyrrolidone-hydrogen peroxide complex can be understood by reference to the co-crystal structure of a hydrogen peroxide complex and its mixed hydrates of a two-monomer...

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