The new Material Science Powder Diffraction beamline at ALBA Synchrotron

2013 ◽  
Vol 28 (S2) ◽  
pp. S360-S370 ◽  
Author(s):  
F. Fauth ◽  
I. Peral ◽  
C. Popescu ◽  
M. Knapp
Keyword(s):  
High Pressure ◽  
High Resolution ◽  
Powder Diffraction ◽  
High Throughput ◽  
Material Science ◽  
In Series ◽  
New Material ◽  
Current Report

The current report describes the installation and the preliminary commissioning of the Material Science Powder Diffraction (MSPD) beamline at the Spanish synchrotron ALBA-CELLS. The beamline is fully dedicated to powder diffraction techniques and consists of two experimental stations positioned in series: a High Pressure/Microdiffraction station and a High Resolution/High Throughput powder diffraction station.

Structure of a new high-pressure–high-temperature modification of antimony(III) oxide, γ-Sb2O3, from high-resolution synchrotron powder diffraction data

2012 ◽  
Vol 68 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Denis Orosel ◽  
Robert E. Dinnebier ◽  
Vladislav A. Blatov ◽  
Martin Jansen
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Resolution ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Powder Diffraction Data ◽  
Temperature Modification ◽  
Synchrotron Powder Diffraction ◽  
High Pressure High Temperature ◽  
High Temperature Modification

A quenchable new high-pressure–high-temperature modification of antimony(III) oxide, γ-Sb2O3, has been obtained at hydrostatic pressures of 9–11 GPa and temperatures of 573–773 K. Its crystal structure has been determined from high-resolution synchrotron powder diffraction data. γ-Sb2O3 consists of three-dimensionally cross-linked infinite chains of SbO3 E units (E = lone pair) with the chains forming tetragonal rod-packing. The underlying topology of γ-Sb2O3 (3,3T8) is found very rarely in inorganic structures; it is realised only for the polyanion [Si4O4N6]10− that occurs in the Ce4(Si4O4N6)O structure type. The structural relation to the two previously known polymorphs of Sb2O3 at ambient pressure, valentinite and senarmontite is discussed.

scholarly journals A Guinier Camera for SR Powder Diffraction: High Resolution and High Throughput

2007 ◽  
Author(s):  
D. Peter Siddons ◽  
Steven L. Hulbert ◽  
Peter W. Stephens
Keyword(s):  
High Resolution ◽  
Powder Diffraction ◽  
High Throughput

scholarly journals Synchrotron powder diffraction simplified; management of an APS mail-in program

2014 ◽  
Vol 70 (a1) ◽  
pp. C789-C789
Author(s):  
Matthew Suchomel ◽  
Gregory Halder ◽  
Lynn Ribaud
Keyword(s):  
High Resolution ◽  
Powder Diffraction ◽  
High Throughput ◽  
Perfect Crystal ◽  
Diverse Range ◽  
Beam Focusing ◽  
Horizontal Beam ◽  
Synchrotron Powder Diffraction ◽  
User Request ◽  
Scintillator Detectors

Synchrotrons have revolutionized powder diffraction. They enable rapid collection of data with tremendous angular resolution and exceptional statistics. High resolution powder diffraction beamlines employing multiple single crystal analyzer detectors routinely reveal subtle crystallographic distortions undetectable on other powder instruments, and are an important tool at most modern synchrotrons for structural studies of a diverse range of materials. Beamline 11-BM at the Advanced Photon Source (APS) is a dedicated high resolution (ΔQ/Q ~2×10-4) powder diffraction instrument which uses vertical and horizontal beam focusing capabilities and a counting system consisting of twelve perfect crystal analyzers paired with scintillator detectors. This APS beamline supports both traditional on-site experiments and a highly successfully rapid access mail-in program mode. This mail-in program has greatly simplified access for a growing user community (> 250 in 2013) to world-class synchrotron quality powder data for their research and resulting publications (> 100 11-BM citations in 2013). The presentation will provide an overview of 11-BM's unique mail-in program. It will be presented both from the view of an external remote user, and will also highlight the numerous alignment, calibration, correction and merging software routines needed to efficiently and accurately reduce the numerous multi-bank detector datasets associated with a high throughput user program. An integrated web interface has been developed to serve as a user-friendly relational database interface for tracking of samples and datasets throughout all stages of the measurements; from the initial user request to sample disposal. The database and software tools critical for this high-throughput synchrotron powder diffraction program will be discussed in detail. More information about the 11-BM and its mail-in program can be found on the beamline webpage: http://11bm.xray.aps.anl.gov

Evidence of interspersed co-existing CaCO3-III and CaCO3-IIIb structures in polycrystalline CaCO3 at high pressure

2014 ◽  
Vol 78 (2) ◽  
pp. 225-233 ◽  
Author(s):  
M. Merlini ◽  
W. A. Crichton ◽  
J. Chantel ◽  
J. Guignard ◽  
S. Poli
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
High Resolution ◽  
Powder Diffraction ◽  
Large Volume ◽  
Powder Sample ◽  
Lower Pressure ◽  
Matrix Transformations ◽  
X Ray ◽  
Xrpd Patterns

AbstractNew experimental data are reported on high-pressure polymorphism of CaCO3. The CaCO3-III phase was stabilized using a large-volume press device and high-resolution X-ray powder diffraction (XRPD) patterns were collected from a few mm3 of powder sample. The interpretation of XRPD indicates that CaCO3-III and CaCO3-IIIb structures are present simultaneously and are in similar proportions. The lack of any unindexed peaks demonstrates that these two polymorphs are the only phases in this experiment, indicating that CaCO3-III and CaCO3-IIIb are the structures most likely to occur above 2.5 GPa. Relevant co-axial crystallographic matrix transformations from lower-pressure polymorphs to both CaCO3-III and CaCO3-IIIb are discussed to illustrate a further possible occurrence of co-existing and interspersed stable polymorphs in carbonate systems.

Nano-probe x-ray analysis and high-resolution imaging on planar defects in high-pressure synthesized infinite-layer superconductor

1994 ◽  
Vol 52 ◽  
pp. 728-729
Author(s):  
Y. Y. Wang ◽  
H. Zhang ◽  
V. P. Dravid ◽  
H. Zhang ◽  
L. D. Marks ◽  
...  
Keyword(s):  
High Pressure ◽  
High Resolution ◽  
Atomic Structure ◽  
Emission Spectra ◽  
High Resolution Electron Microscopy ◽  
Planar Defects ◽  
X Ray ◽  
Infinite Layer ◽  
Resolution Electron ◽  
Resolution Imaging

Azuma et al. observed planar defects in a high pressure synthesized infinitelayer compound (i.e. ACuO2 (A=cation)), which exhibits superconductivity at ~110 K. It was proposed that the defects are cation deficient and that the superconductivity in this material is related to the planar defects. In this report, we present quantitative analysis of the planar defects utilizing nanometer probe xray microanalysis, high resolution electron microscopy, and image simulation to determine the chemical composition and atomic structure of the planar defects. We propose an atomic structure model for the planar defects.Infinite-layer samples with the nominal chemical formula, (Sr1-xCax)yCuO2 (x=0.3; y=0.9,1.0,1.1), were prepared using solid state synthesized low pressure forms of (Sr1-xCax)CuO2 with additions of CuO or (Sr1-xCax)2CuO3, followed by a high pressure treatment.Quantitative x-ray microanalysis, with a 1 nm probe, was performed using a cold field emission gun TEM (Hitachi HF-2000) equipped with an Oxford Pentafet thin-window x-ray detector. The probe was positioned on the planar defects, which has a 0.74 nm width, and x-ray emission spectra from the defects were compared with those obtained from vicinity regions.

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