Studies in the system BaO–Al2O3–SiO2 III. The binary system sanbornite–eelsian

1969 ◽  
Vol 37 (288) ◽  
pp. 459-465 ◽  
Author(s):  
H. C. Lin ◽  
W. R. Foster
Keyword(s):  
Solid Solution ◽  
Binary System ◽  
Eutectic System ◽  
Naturally Occurring ◽  
Binary Eutectic ◽  
Quenching Method

SummaryThe system sanbornite-celsian has been investigated by the quenching method, and the results compared with earlier studies. The system is essentially a simple binary eutectic system with little or no solid solution. The eutectic is located at a composition of 69% sanbornite and 31% celsian (by weight) and at a temperature of 1227±3°C. No evidence for substantial solid solution of celsian in sanbornite, as reported in previous work, was found. Paracelsian, a naturally occurring polymorph of celsian, was not encountered in the study.

The system CaF2–CaMgSi2O6

1969 ◽  
Vol 6 (2) ◽  
pp. 269-280 ◽  
Author(s):  
S. B. Lin ◽  
B. J. Burley
Keyword(s):  
Solid Solution ◽  
Atmospheric Pressure ◽  
Intermediate Compound ◽  
Weight Percent ◽  
Grenville Province ◽  
Precambrian Shield ◽  
Binary Eutectic ◽  
Quenching Method

The solid-melt equilibria of the system CaF2–CaMgSi2O6 (fluorite–diopside) have been studied at atmospheric pressure, using a modified quenching method. This system is characterized by a simple binary eutectic at CaF2 43.5, CaMgSi2O6 56.5 weight percent at 1082 ± 2 °C; neither solid solution nor intermediate compound was found. Certain of the skarns containing fluorite, diopside, and calcite in the Grenville Province of the Canadian Precambrian Shield are considered to have formed by differential melting of impure limestones in regional metamorphic terrains.

scholarly journals Solubility behavior of δ-AlOOH and ε-FeOOH at high pressures

2019 ◽  
Vol 104 (10) ◽  
pp. 1416-1420 ◽  
Author(s):  
Chaowen Xu ◽  
Masayuki Nishi ◽  
Toru Inoue
Keyword(s):  
Solid Solution ◽  
Binary System ◽  
Solid Solutions ◽  
High Pressures ◽  
Low Pressure ◽  
Solubility Behavior ◽  
Deep Mantle ◽  
Deep Interior ◽  
Geodynamic Processes ◽  
Binary Eutectic

Abstract Low-pressure polymorphs of AlOOH and FeOOH are common natural oxyhydroxides at the Earth's surface, which may transport hydrogen to the deep mantle via subduction. At elevated pressures, the low-pressure polymorphs transform into δ-AlOOH and ε-FeOOH with CaCl2-type structure, which form a solid solution above 18 GPa. Nevertheless, few studies have examined the solid solution behavior of this binary system in detail. In this study, we ascertain the phase relations in the AlOOH–FeOOH binary system at 15–25 GPa and 700–1200 °C. X-ray diffraction (XRD) measurements of quenched samples show that δ-AlOOH and ε-FeOOH partly form solid solutions over wide pressure and temperature ranges. Our results demonstrate that a binary eutectic diagram is formed without dehydration or melting below 1200 °C at 20 GPa. We also observe that the maximum solubilities of Al and Fe in the solid solutions are more strongly influenced by temperature than pressure. Our results suggest that the CaCl2-type hydroxides subducted into the deep mantle form a solid solution over a wide composition range. As AlOOH and FeOOH are present in hydrous crust, these phases may be subducted into the deep interior, transporting a significant amount of hydrogen to deeper regions. Therefore, a better understanding of this binary system may help elucidate the model geodynamic processes associated with the deep water cycling in the Earth.

scholarly journals Formation of a solid solution between [N(C2H5)4][BF4] and [N(C2H5)4][PF6] in crystal and plastic crystal phases

2017 ◽  
Vol 19 (3) ◽  
pp. 2053-2059 ◽  
Author(s):  
Kazuhiko Matsumoto ◽  
Ryojun Nonaka ◽  
Yushen Wang ◽  
Gleb Veryasov ◽  
Rika Hagiwara
Keyword(s):  
Solid Solution ◽  
Binary System ◽  
Rock Salt ◽  
Plastic Crystal ◽  
Plastic Crystals ◽  
System Form ◽  
Crystal Phases ◽  
Form Solid Solution

The [N(C2H5)4][BF4]–[N(C2H5)4][PF6] binary system form solid solution in both crystal and plastic crystal phases (rock-salt type for plastic crystals).

Room-temperature solid solution softening in Fe-V binary system

2015 ◽  
Vol 22 (1) ◽  
pp. 7-11
Author(s):  
Jihye Park ◽  
Jae-Hyeok Shim ◽  
Young-Kook Lee
Keyword(s):  
Solid Solution ◽  
Binary System ◽  
Room Temperature ◽  
Solid Solution Softening

THEORETICAL CALCULATION OF ATOMIC STRAIN ON MECHANICAL ALLOYED METASTABLE INTERMETALLIC

2009 ◽  
Vol 16 (01) ◽  
pp. 157-160
Author(s):  
L. PANG ◽  
J. XU ◽  
J. ZHANG
Keyword(s):  
Solid Solution ◽  
Solid State ◽  
Binary System ◽  
Mechanical Alloying ◽  
Theoretical Calculation ◽  
Solid State Reaction ◽  
Lattice Strain ◽  
Electron Theory ◽  
Strain Behavior ◽  
Good Coincidence

Mechanical alloying (MA) has been utilized to synthesize many equilibrium and/or nonequilibrium phases. During the MA process, alloys are formed by the solid-state reaction. Solid solution has been obtained by MA, strain occurs due to the dissolution one component in the binary system. An understanding of the strain in mechanical alloyed Ti – Al , Fe – Al , Ni – Al from the electronic level has remained elusive. In this communication, atomic strain behavior of Ti – Al , Fe – Al , Ni – Al systems is analyzed on the basis of the TFDC (abbreviation of the name of Thomas, Fermi, Dirac, and Cheng) electron theory. Lattice strain of Ti , Fe , Ni , and Al are compared with available experimental results. A very good coincidence was found.

The chemical stability of mimetite and distribution coefficients for pyromorphite–mimetite solid-solutions

1989 ◽  
Vol 53 (371) ◽  
pp. 363-371 ◽  
Author(s):  
Adedayo I. Inegbenebor ◽  
John H. Thomas ◽  
Peter A. Williams
Keyword(s):  
Solid Solution ◽  
Aqueous Solution ◽  
Solid Phase ◽  
Distribution Coefficients ◽  
Solid Solution Series ◽  
Solution Series ◽  
Ph Values ◽  
Naturally Occurring ◽  
Phosphate Species ◽  
End Members

AbstractThe equilibrium solubility of mimetite has been determined in aqueous solution at 298.2K. For the reaction Pb5(ASO4)3Cl(s,mimetite)+6H+(aq)⇌5Pb2+(aq)+3H2AsO4−(aq)+Cl−(aq) at this temperature log KH+, extrapolated to zero ionic strength, is equal to −27.9(4). This value is equal, within experimental error, to that corresponding to pyromorphite, Pb5(PO4)3Cl, derived from the literature, and redetermined here under analogous conditions. Distribution coefficients in terms of both HXO42− and H2XO4−(aq) ions (X = P,As) have also been determined for solid phases of the pyromorphite-mimetite solid solution series containing from 5 to 95 mol. % mimetite. Although the two end-members are isostructural without being strictly isomorphous, the solid solution series behaves ideally over the whole compositional range; that is, the composition of the solid phase reflects the ratio of arsenate to phosphate species in aqueous solution at pH values corresponding to naturally-occurring aqueous solutions generally associated with the oxidized zones of base metal orebodies. Some relationships between mimetite and other secondary lead(II) and copper(II) arsenate minerals have been explored.

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