A qualitative x-ray powder diffraction study of the structures of strontium-barium zirconate solid solutions at room temperature

1979 ◽  
Vol 1 (1) ◽  
pp. 49-60 ◽  
Author(s):  
M. Ahtee ◽  
A. Ahtee
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Room Temperature ◽  
Barium Zirconate ◽  
Strontium Barium ◽  
X Ray

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

2008 ◽  
Vol 23 (S1) ◽  
pp. S70-S74 ◽  
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.

X-ray powder diffraction study on ErNi2Ge2

1999 ◽  
Vol 14 (2) ◽  
pp. 145-146
Author(s):  
Liangqin Nong ◽  
Lingmin Zeng
Keyword(s):  
Least Squares ◽  
Diffraction Study ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Room Temperature ◽  
Rietveld Analysis ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray

An X-ray diffraction pattern for ErNi2Ge2 at room temperature is reported. ErNi2Ge2 is tetragonal with lattice parameters a=4.0191(2) Å, c=9.7643(2) Å, space group I4/mmm, and Z=2. The lattice parameters derived from Rietveld analysis agree well with the results of a least-squares refinement.

X-ray powder diffraction study of the stability of solid solutions in LaO(Cl1−xBrx)

1997 ◽  
Vol 262-263 ◽  
pp. 299-304 ◽  
Author(s):  
Jorma Hölsä ◽  
Mika Lastusaari ◽  
Jussi Valkonen
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
X Ray ◽  
The Stability

X-ray powder diffraction study of monoclinic V4+-ZrO2 solid solutions obtained from gels

2003 ◽  
Vol 173 (1) ◽  
pp. 40-44 ◽  
Author(s):  
Francisco Jose Torres ◽  
José Maria Amigó ◽  
Javier Alarcón
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
X Ray

Phase Equilibria in Copper(I) Bromide-MBr Systems (M = Li, Na, K)

2007 ◽  
Vol 62 (9) ◽  
pp. 507-512 ◽  
Author(s):  
Alina Wojakowska ◽  
Edward Krzyżaka ◽  
Andrzej Wojakowski ◽  
Marek Wołcyrz
Keyword(s):  
Phase Equilibria ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Solid Solubility ◽  
Room Temperature ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Mutual Solid Solubility

The phase equilibria of CuBr-LiBr, CuBr-NaBr and CuBr-KBr were studied by difference scanning calorimetry (DSC) and X-ray powder diffraction. Extended solid solutions have been found in CuBr-LiBr, while mutual solid solubility of the components of CuBr-NaBr and CuBr-KBr seems to be negligible. It has been confirmed that K2CuBr3 is stable at room temperature.

Crystal structure of the anticancer drug carmustine determined by X-ray powder diffraction

2021 ◽  
pp. 1-3
Author(s):  
Carina Schlesinger ◽  
Edith Alig ◽  
Martin U. Schmidt
Keyword(s):  
Crystal Structure ◽  
Anticancer Drug ◽  
Powder Diffraction ◽  
Room Temperature ◽  
Powder Diffraction Data ◽  
Orthorhombic Space Group ◽  
Commercial Sample ◽  
One Dimensional ◽  
X Ray ◽  
Hydrogen Bond Pattern

The structure of the anticancer drug carmustine (1,3-bis(2-chloroethyl)-1-nitrosourea, C5H9Cl2N3O2) was successfully determined from laboratory X-ray powder diffraction data recorded at 278 K and at 153 K. Carmustine crystallizes in the orthorhombic space group P212121 with Z = 4. The lattice parameters are a = 19.6935(2) Å, b = 9.8338(14) Å, c = 4.63542(6) Å, V = 897.71(2) ų at 153 K, and a = 19.8522(2) Å, b = 9.8843(15) Å, c = 4.69793(6) Å, V = 921.85(2) ų at 278 K. The Rietveld fits are very good, with low R-values and smooth difference curves of calculated and experimental powder data. The molecules form a one-dimensional hydrogen bond pattern. At room temperature, the investigated commercial sample of carmustine was amorphous.

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