X-ray powder diffraction and Mössbauer studies on the formation of Cd0.5Ni0.5Fe2O4/Zn0.5Ni0.5Fe2O4 spinel solid solutions

Phase relations in two binary systems MgAl2O4–ZnAl2O4 and MgAl2O4–Mg2TiO4 have been studied and phase diagrams for them have been constructed. Based on the data of x-ray phase and crystal-optical analyses, the formation of a continuous series of solid solutions with spinel structure between the terminal members of the systems studied has been established. In the MgAl2O4–ZnAl2O4 system the solid solution is stable in the range from room temperature to melting temperature. In the MgAl2O4–Mg2TiO4 system the solid solution decomposes below 1380 °C, yielding the formation of limited regions of homogeneity on the basis of MgAlM2O4 and Mg2+2δ Ti1–δO4. Decomposition of the solid solution is accompanied by crystallization of MgTiO3.

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ChemInform Abstract: New Lamellar Oxophosphorus Derivatives of Ni(II): X-Ray Powder Diffraction Structure Determinations and Magnetic Studies of Ni(HPO3). times.H2O, NiCl(H2PO2)×H2O, and NixCo1-x(HPO3)×H2O Solid Solutions.

ChemInform ◽

10.1002/chin.199407033 ◽

2010 ◽

Vol 25 (7) ◽

pp. no-no

Author(s):

M. D. MARCOS ◽

P. AMOROS ◽

F. SAPINA ◽

A. BELTRAN-PORTER ◽

R. MARTINEZ-MANEZ ◽

...

Keyword(s):

Powder Diffraction ◽

Solid Solutions ◽

Magnetic Studies ◽

X Ray ◽

Diffraction Structure ◽

Structure Determinations ◽

Derivatives Of

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Powder-diffraction data for several solid solutions with the compositions (CaxSr1−x)CuO2 and (CaxSr1−x)2CuO3

Powder Diffraction ◽

10.1017/s0885715600015025 ◽

1995 ◽

Vol 10 (4) ◽

pp. 296-299 ◽

Cited By ~ 5

Author(s):

S. T. Misture ◽

C. Park ◽

R. L. Snyder ◽

B. Jobst ◽

B. Seebacher

Keyword(s):

High Temperature ◽

Solid State ◽

Powder Diffraction ◽

Solid Solutions ◽

Diffraction Data ◽

Solid State Reaction ◽

High Temperature Superconductors ◽

Powder Diffraction Data ◽

X Ray ◽

Diffraction Patterns

Several compositions of the solid solutions (CaxSr1−x)CuO2 and (CaxSr1−x)2CuO3, both of which are found as minor phases in the high-temperature superconductors, were prepared by solid-state reaction. X-ray powder-diffraction patterns for three compositions of (CaxSr1−x)CuO2 and two for (CaxSr1−x)2CuO3 are presented.

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High-temperature X-ray powder diffraction study of the tetragonal-cubic phase transition in nanocrystalline, compositionally homogeneous ZrO2–CeO2 solid solutions

Powder Diffraction ◽

10.1154/1.2903423 ◽

2008 ◽

Vol 23 (S1) ◽

pp. S70-S74 ◽

Cited By ~ 6

Author(s):

L. M. Acuña ◽

R. O. Fuentes ◽

D. G. Lamas ◽

I. O. Fábregas ◽

N. E. Walsöe de Reca ◽

...

Keyword(s):

Crystal Structure ◽

Phase Transition ◽

High Temperature ◽

Powder Diffraction ◽

Solid Solutions ◽

Tetragonal Phase ◽

Room Temperature ◽

Cubic Phase ◽

X Ray ◽

First Order

Crystal structure of compositionally homogeneous, nanocrystalline ZrO2–CeO2 solutions was investigated by X-ray powder diffraction as a function of temperature for compositions between 50 and 65 mol % CeO2. ZrO2-50 and 60 mol % CeO2 solid solutions, which exhibit the t′-form of the tetragonal phase at room temperature, transform into the cubic phase in two steps: t′-to-t″ followed by t″-to-cubic. But the ZrO2-65 mol % CeO2, which exhibits the t″-form, transforms directly to the cubic phase. The results suggest that t′-to-t″ transition is of first order, but t″-to-cubic seems to be of second order.

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