Lignes monovariantes de l'isotherme 75 °C du système quaternaire réciproque: H3PO4–K2SO4–H2SO4–K3PO4–H2O

1993 ◽  
Vol 71 (11) ◽  
pp. 1816-1820 ◽  
Author(s):  
Néji Bourguiba ◽  
Tahar Jouini
Keyword(s):  
Solid Solution ◽  
Chemical Analysis ◽  
Ternary System ◽  
Reciprocal System ◽  
Substitution Type ◽  
Invariant Points ◽  
Boundary Curves

The boundary curves and quaternary invariant points of the reciprocal system H3PO4–K2SO4–H2SO4–K3PO4–H2O were investigated at 75 °C and 1 atm by chemical analysis of solutions in equilibria, respectively, with two or three salts. Eleven compounds occur in this system. Only eight of them have crystallization areas inside Janecke's prism; these are K2SO4, K2SO4•KHSO4, K2SO4•7KHSO4•H2O, KHSO4, KH2PO4•KHSO4, KH5(PO4)2, KH2PO4, and a solid solution K8(H2PO4)1+x(HSO4)7−x, 0 ≤ x ≤ 1, of substitution type continuous between the two limiting compositions KH2PO4•7KHSO4 and KH2PO4•3KHSO4. The crystallization fields of 3K2HPO4•KH2PO4•2H2O, K2HPO4, and K3PO4•3H2O are very close to the solubility curves of the ternary system K3PO4–H3PO4–H2O. Results are explained and discussed.

The Defect Structure of CdO

1987 ◽  
Vol 42 (6) ◽  
pp. 746-749 ◽  
Author(s):  
Jenő Juhász ◽  
Sarolta Igaz ◽  
Béla Jóvér ◽  
Zoltán G. Szabó
Keyword(s):  
Solid Solution ◽  
Chemical Analysis ◽  
Defect Structure ◽  
Direct Determination ◽  
Good Reproducibility ◽  
Heat Treated ◽  
Defect Sites

Abstract Defect Sites of CdO, Reducibility, Analysis Three procedures of chemical analysis are proposed for the direct determination of excess Cd in CdO: a spectrophotometric, a titrimetric and a gravimetric one, for 0-1500 ppm, 500-50,000 ppm and above 5%, respectively. The good reproducibility and reliability is illustrated by results referring to CdO samples heat-treated in H 2 and in air between 100 and 350 °C. Reduction in H2 increases the concentration of excess Cd up to 4000 ppm, above that separate Cd phase forms. The excess Cd in solid solution (interstitial sites) is more resistant against re-oxidation, than the bulk Cd phase.

scholarly journals Silicon Nitride Solid Solution in the Ternary System, Si3N4-AlN-SiO2

1975 ◽  
Vol 83 (963) ◽  
pp. 553-557 ◽  
Author(s):  
Nobuo KAMIYA ◽  
Yoichi OYAMA ◽  
Osami KAMIGAITO
Keyword(s):  
Solid Solution ◽  
Silicon Nitride ◽  
Ternary System

scholarly journals Experimental Investigation of the Phase Equilibria in the Al-Mn-Zn System at 400°C

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Tian Wang ◽  
Dmytro Kevorkov ◽  
Ahmad Mostafa ◽  
Mamoun Medraj
Keyword(s):  
Solid Solution ◽  
Ternary System ◽  
Terminal Solid Solution ◽  
Stoichiometric Compound ◽  
Diffusion Couples ◽  
Ternary Compounds ◽  
Ternary Solubility ◽  
Limited Solid Solubility ◽  
Binary Compounds ◽  
Phase Relationships

Al-Mn-Zn ternary system is experimentally investigated at 400°C using diffusion couples and key alloys. Phase relationships and homogeneity ranges are determined for binary and ternary compounds using EPMA, SEM/EDS, and XRD. Reported ternary compound T3 (Al11Mn3Zn2) is confirmed in this study and is denoted as τ2 in this paper. Two new ternary compounds (τ1 and τ3) are observed in this system at 400°C. τ1 is determined as a stoichiometric compound with the composition of Al31Mn8Zn11. τ3 has been found to have homogeneity range of AlxMnyZnz (x=9–13 at%; y=11–15 at%; z=75–77 at%). The binary compounds Al4Mn and Al11Mn4 exhibit limited solid solubility of around 6 at% and 4 at% Zn, respectively. Terminal solid solution Al8Mn5 is found to have maximum ternary solubility of about 10 at% Zn. In addition, ternary solubility of Al-rich β-Mn′ at 400°C is determined as 4 at% Zn. Zn-rich β-Mn′′ has a ternary solubility of 3 at% Al. The solubility of Al in Mn5Zn21 is measured as 5 at%. Based on the current experimental results, the isothermal section of Al-Mn-Zn ternary system at 400°C has been constructed.

Phase relationships in the Ce–Nd–B system at 773 K

2020 ◽  
Vol 111 (6) ◽  
pp. 526-532
Author(s):  
Xuehong Cui ◽  
Jinming Zhu ◽  
Ketong Luo ◽  
Jianlie Liang
Keyword(s):  
Solid Solution ◽  
Ternary System ◽  
Continuous Solid Solution ◽  
Solution Phase ◽  
Solid Solution Phase ◽  
X Ray Diffraction ◽  
Two Phase ◽  
X Ray ◽  
Three Phase ◽  
Phase Relationships

Abstract Phase relationships in the Ce-Nd-B ternary system at 773 K were investigated by means of X-ray diffraction and scanning electron microscopy with energy dispersive X-ray spectroscopy techniques. Six borides, i. e. CeB4, CeB6, NdB4, NdB6, NdB66 and Nd2B5 are confirmed in this work. No ternary compound was observed. CeB4 and NdB4 were discovered to form the continuous solid solution phase (Ce,Nd)B4, CeB6 and NdB6 also form the solid solution phase (Ce,Nd)B6. The maximum solid solubility of Ce in (Ce,Nd)2B5 phase is 46.5 at.%. The isothermal section of the Ce-Nd-B ternary system at 773 K consists of 3 three-phase regions, 7 two-phase regions and 7 single- phase regions.

A Review of the XRD Data of the Phases Present in the CaO-SrO-CuO System

1992 ◽  
Vol 7 (3) ◽  
pp. 142-148 ◽  
Author(s):  
Brian J. Reardon ◽  
Camden R. Hubbard
Keyword(s):  
Solid Solution ◽  
Ternary System ◽  
Crystal Structures ◽  
Powder Diffraction ◽  
Solid Solution Series ◽  
Powder Diffraction File ◽  
Reference Pattern ◽  
X Ray ◽  
Solution Series ◽  
Xrd Patterns

AbstractX-ray powder patterns for the phases in the CaO-SrO-CuO ternary system, along with the corresponding crystal structures, were obtained from the literature and from the Powder Diffraction File. Available XRD patterns were compared with each other and with a calculated pattern for each phase, yielding a recommended reference pattern. The simulated powder patterns presented here deal with the phases found within the (Ca,Sr)O, (Ca,Sr)2CuO3, (Ca,Sr)14Cu24O41, (Ca,Sr)CuO2, (Ca,Sr)Cu2O3, and (Ca,Sr)Cu2O2 solid solution series and are recommended for the Powder Diffraction File (PDF).

The ternary system BaO-ZnO-SiO2

1970 ◽  
Vol 23 (6) ◽  
pp. 1077 ◽  
Author(s):  
ER Segnit ◽  
AE Holland
Keyword(s):  
Melting Point ◽  
Ternary System ◽  
Ternary Compounds ◽  
Molar Ratios ◽  
Invariant Points ◽  
Equilibrium Relationships

The equilibrium relationships in the greater part of the ternary system BaO-ZnO-SiO2 have been determined. Fifteen ternary invariant points have been located; six of these are eutectics, and the minimum melting point in the system is 1100� at a composition of 41.7% BaO, 17.00/0 ZnO, 41.3% SiO2 by weight. Five ternary compounds with molar ratios of BaO : ZnO : SiO2 of 1 : 1 : 1, 1 : 1 : 3, 1 : 2 : 2, 2 : 1 : 2, and 2 : 3 : 3 are described.

The SEM and EDS Energy Spectrum Analysis of a Beach Placer

2010 ◽  
Vol 158 ◽  
pp. 273-280
Author(s):  
Jun Qiu ◽  
Xian Jun Lu ◽  
Ping Chen ◽  
Shu Gang Hu ◽  
Gui Fang Wang
Keyword(s):  
Solid Solution ◽  
Energy Spectrum ◽  
Chemical Analysis ◽  
Electron Probe ◽  
X Ray Diffraction ◽  
Electron Microscopic ◽  
X Ray ◽  
Metallic Mineral ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

In order to study the phase of Fe and Ti in a beach placer , different methods such as the X-ray diffraction analysis, chemical analysis, scanning electron microscopic , electron probe microanalysis are used to study the characteristics of the beach placer . The research results show the major metallic mineral in the beach placer is titanic magnetite, EDS and energy spectrum map features of which indicate that the vast majority of titanic magnetite contain a certain amount of Ti , the two elements of Fe and Ti take on closely symbiosis and distribute more evenly in titanic magnetite. The Ti exists in the Magnetite lattice in form of isomorphism. The theoretical highest grade of Fe and Ti in the separated Magnetic concentrate are 66.02per cent and 4.86 per cent respectively. In addition, the beach placer contains a small quantity of Ilmenite which is hysterogenic and exists in the form of fine solid solution separation structure in the titanic magnetite

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