scholarly journals Long- and short-range structure studies of KBT-KBZ solid-solutions using synchrotron radiation

2015 ◽  
Vol 44 (23) ◽  
pp. 10681-10688 ◽  
Author(s):  
Samuel Liu ◽  
Peter E. R. Blanchard ◽  
Zhaoming Zhang ◽  
Brendan J. Kennedy ◽  
Chris D. Ling
Keyword(s):  
Solid Solution ◽  
Synchrotron Radiation ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Short Range ◽  
X Ray ◽  
Diffraction Patterns ◽  
Short Range Structure

Synchrotron X-ray powder diffraction patterns of K0.5Bi0.5Ti1−xZrxO3 (KBT-KBZ), showing the pseudocubic tetragonal region at all intermediate compositions in the solid-solution.

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

1995 ◽  
Vol 10 (4) ◽  
pp. 296-299 ◽  
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.

X-ray powder diffraction characterization of Bi14(Sr,Ca)12O33 solid solutions

1996 ◽  
Vol 11 (4) ◽  
pp. 268-275 ◽  
Author(s):  
Winnie Wong-Ng ◽  
F. Jiang ◽  
Bryan R. Jarabek ◽  
Gregory J. McCarthy
Keyword(s):  
Solid Solution ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Cell Parameter ◽  
X Ray Diffraction ◽  
Powder Diffraction File ◽  
X Ray ◽  
Solid Solution Range

Powder X-ray diffraction was used to investigate the solid solution range of the Bi14SrxCa12−xO33 series in the Bi–Sr–Ca–O system. Solid solution forms over the range 1≤x≤7 in Bi14SrxCa12−xO33. Experimental X-ray reference patterns of selected members with x=1, 3, 5, and 7 have been prepared for the powder diffraction file (PDF). These phases are monoclinic, C2/m, with cell parameter a ranging from 21.473(4) to 21.868(4) Å, b from 4.3564(9) to 4.3898(9) Å, c from 12.753(2) to 12.962(2) Å, β from 102.91(2)° to 102.79(1)°, and V from 1162.9(3) to 1213.5(3) Å3, respectively. These parameters increase monotonically as Ca is continuously replaced by the larger Sr.

Drastic Decrease of the Curie Temperature in the Solid Solution GdRuxCd1–x

2009 ◽  
Vol 64 (3) ◽  
pp. 356-360 ◽  
Author(s):  
Frank Tappe ◽  
Falko M. Schappacher ◽  
Wilfried Hermes ◽  
Matthias Eul ◽  
Rainer Pöttgen
Keyword(s):  
Solid Solution ◽  
Magnetic Properties ◽  
Curie Temperature ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Induction Melting ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Drastic Effect ◽  
Cscl Structure

Five samples of solid solutions GdRuxCd1−x extending up to x ≈ 0.25 were synthesized by induction-melting of the elements in sealed tantalum tubes. According to X-ray powder diffraction data, the GdRuxCd1−x samples crystallize with the cubic CsCl structure. The structures of two crystals were refined from diffractometer data: Pm3̄m, a = 372.41(4) pm, wR2 = 0.0363, 45 F2, 5 variables for GdRu0.10(1)Cd0.90(1) and a = 367.70(4) pm, wR2 = 0.0301, 39 F2, 5 variables for GdRu0.20(1)Cd0.80(1). The cadmium-ruthenium substitution has a drastic effect on the magnetic properties. All samples order ferromagnetically, however, the Curie temperature decreases drastically from 258 K for GdCd to 63.6 K for GdRu0.20Cd0.80 with a Vegard-type behavior.

Investigation of (Sr4−δCaδ)PtO6 using X-ray Rietveld refinement

1999 ◽  
Vol 14 (3) ◽  
pp. 181-189 ◽  
Author(s):  
W. Wong-Ng ◽  
J. A. Kaduk ◽  
R. A. Young ◽  
F. Jiang ◽  
L. J. Swartzendruber ◽  
...  
Keyword(s):  
Solid Solution ◽  
Rietveld Refinement ◽  
Powder Diffraction ◽  
Solid Solution Series ◽  
X Ray ◽  
Cell Parameters ◽  
Solution Series ◽  
Complete Solid Solution ◽  
Ca Ions ◽  
Diffraction Patterns

The structures of the solid solution series (Sr4−δCaδ)PtO6, with δ=0, 0.85(1), 2, and 3, have been investigated using the Rietveld refinement technique with laboratory X-ray powder diffraction data. A complete solid solution between Sr and Ca was confirmed to exist. These compounds crystallize in the rhombohedral space group R3¯c. The cell parameters of the series range from a of 9.4780(3) to 9.7477(1) Å, and c from 11.3301(4) to 11.8791(1) Å for δ from 3 to 0, respectively. The structure consists of chains of alternating trigonal prismatic (Sr, Ca)O6 and octahedral PtO6 units running parallel to the c axis. These chains are connected to each other via a second type of (Sr, Ca) ions, which are surrounded by eight oxygens, in a distorted square antiprismatic geometry. As Ca replaced Sr in Sr4PtO6, it was found to substitute preferentially in the smaller octahedral (Sr, Ca)1 site (6a) rather than at the eight-coordinate (Sr, Ca)2 site (18e). There appears to be an anomaly of cell parameters a and c at the compound Sr3.15Ca0.85PtO6. Their dependence on Ca content changes at δ≈1.00, where the Ca has fully replaced Sr in the 6a site. The substitution of Sr by Ca reduced the average (Sr, Ca)1–O length from 2.411 to 2.311 Å and (Sr, Ca)2–O from 2.659 to 2.570 Å as the composition varied from Sr4PtO6 to SrCa3PtO6. Reference X-ray powder diffraction patterns were prepared from the Rietveld refinement results for these members of the solid solution series. Magnetic susceptibility measurements of three of the samples (δ=0, 0.85, 2) show electronic transitions at low temperatures.

Effect of Isovalent Substitution on the Formation and Luminescence Properties of Solid Solutions BiPXV1-XO4 Doped with Europium (III)

2015 ◽  
Vol 230 ◽  
pp. 62-66 ◽  
Author(s):  
Konstantin L. Bychkov ◽  
Katerina V. Terebilenko ◽  
Rostyslav P. Linnik ◽  
Nikolay S. Slobodyanik
Keyword(s):  
Solid Solution ◽  
Solid State ◽  
Luminescence Spectrum ◽  
Powder Diffraction ◽  
Solid Solutions ◽  
Single Phase ◽  
Photoluminescence Spectroscopy ◽  
Electronic Transitions ◽  
X Ray ◽  
Isovalent Substitution

Solid solution BiP0.9V0.1O4 from BiPXV1-XO4 system has been synthesized by solid state synthesis at 973 K. It has been shown that the phosphate-vanadate can be prepared as a single phase for x =0.9, while higher degree of (P/V)O4 substitution in BiVO4 has not been detected for the range studied. The substitution peculiarities have been investigated by X-Ray powder diffraction, infrared and photoluminescence spectroscopy. The luminescence spectrum of BiPXV1-XO4:Eu3+ solid solution reveal intensive photoluminescence lines related to f-f electronic transitions in Eu3+ ions.

Characterization of new solid solution phases in (Y,Ca)(Cr,Co)O3 system

1995 ◽  
Vol 10 (1) ◽  
pp. 40-43 ◽  
Author(s):  
Cem Basceri ◽  
A. Cuneyt Tas ◽  
Muharrem Timucin
Keyword(s):  
Solid Solution ◽  
Powder Diffraction ◽  
Pechini Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modified Pechini Method ◽  
Diffraction Patterns

New solid solution phases in the (Y,Ca)(Cr,Co)O3 system have been synthesized and characterized by powder X-ray diffraction. The selected compositions in this system were prepared by the modified Pechini method. Powder-diffraction patterns were prepared.

Crystal structures and reference X-ray powder diffraction patterns of Sr4−xCaxPb2O8 (x=1,2,3)

1998 ◽  
Vol 13 (4) ◽  
pp. 232-240 ◽  
Author(s):  
W. Wong-Ng ◽  
J. A. Kaduk ◽  
W. Greenwood
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
Crystal Structures ◽  
Powder Diffraction ◽  
Alkaline Earth ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Powder Diffraction File ◽  
X Ray ◽  
Diffraction Patterns

The crystal structure of the solid solution alkaline earth plumbate phase Sr4−xCaxPb2O8 was investigated using the X-ray Rietveld technique for x=1, 2, and 3. The lattice parameters a, b, c, and V were found to decrease linearly as the Sr at site 4h was replaced by Ca. The structure features chains of edge-sharing PbO6 octahedra, linked by seven-coordinated (Ca/Sr)–O monocapped trigonal prisms. The structure is similar to that of Pb3O4, which can be reformulated as Pb2IIPbIVO4. X-ray diffraction patterns for the solid solution members SrCa3Pb2O8, Sr2Ca2Pb2O8, and Sr3CaPb2O8 were prepared for inclusion in the Powder Diffraction File.

Direct Observation of Monolayer Zones in Al-wt 4% Cu

1990 ◽  
Vol 48 (1) ◽  
pp. 14-15
Author(s):  
B. Jouffrey ◽  
D. Dorignac ◽  
A. Bourret
Keyword(s):  
Solid Solution ◽  
Synchrotron Radiation ◽  
Direct Observation ◽  
Supersaturated Solid Solution ◽  
Original Model ◽  
X Ray ◽  
Image Position

Since the early works on GP zones and the model independently proposed by Preston and Guinier on the first steps of precipitation in supersaturated solid solution of aluminium containing a few percent of copper, many works have been performed to understand the structure of different stages in the sequence of precipitation.The scheme which is generally admitted can be drawn from a work by Phillips.In their original model Guinier and Preston analysed a GP zone as composed of a single (100) copperrich plane surrounded by aluminum atomic planes with a slightly shorter distance from the original plane than in the solid solution.From X-ray measurements it has also been shown that GP1 zones were not only copper monolayer zones. They could be up to a few atomic planes thick. Different models were proposed by Guinier, Gerold, Toman. Using synchrotron radiation, proposals have been recently made.

scholarly journals Synthesis of Ce1−xPdxO2−δ Solid Solution in Molten Nitrate

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 640
Author(s):  
Hideaki Sasaki ◽  
Keisuke Sakamoto ◽  
Masami Mori ◽  
Tatsuaki Sakamoto
Keyword(s):  
Electron Microscopy ◽  
Solid Solution ◽  
Solid Solutions ◽  
Photoelectron Spectroscopy ◽  
Synthesis Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Co Precipitation ◽  
Ionic States

CeO2-based solid solutions in which Pd partially substitutes for Ce attract considerable attention, owing to their high catalytic performances. In this study, the solid solution (Ce1−xPdxO2−δ) with a high Pd content (x ~ 0.2) was synthesized through co-precipitation under oxidative conditions using molten nitrate, and its structure and thermal decomposition were examined. The characteristics of the solid solution, such as the change in a lattice constant, inhibition of sintering, and ionic states, were examined using X-ray diffraction (XRD), scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM−EDS), transmission electron microscopy (TEM)−EDS, and X-ray photoelectron spectroscopy (XPS). The synthesis method proposed in this study appears suitable for the easy preparation of CeO2 solid solutions with a high Pd content.

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