scholarly journals Average site-occupation in 3dtransition metal phases determined from conventional X-ray and synchrotron radiation diffraction data

1981 ◽  
Vol 37 (a1) ◽  
pp. C307-C308
Author(s):  
H. L. Yakel
Keyword(s):  
Synchrotron Radiation ◽  
Diffraction Data ◽  
X Ray ◽  
Site Occupation ◽  
Synchrotron Radiation Diffraction ◽  
Metal Phases

Refinement of the crystal structure of sieleckiite and revision of its symmetry

2017 ◽  
Vol 81 (4) ◽  
pp. 917-922
Author(s):  
Peter Elliott
Keyword(s):  
Crystal Structure ◽  
Synchrotron Radiation ◽  
Single Crystal ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
Aluminium Phosphate ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Phosphate Mineral

AbstractThe crystal structure of the copper aluminium phosphate mineral sieleckiite, Cu3Al4(PO4)2 (OH)12·2H2O, from the Mt Oxide copper mine, Queensland, Australia was solved from single-crystal X-ray diffraction data utilizing synchrotron radiation. Sieleckiite has monoclinic rather than triclinic symmetry as previously reported and is space group C2/m with unit-cell parameters a = 11.711(2), b = 6.9233(14), c = 9.828(2) Å, β = 92.88(3)°, V = 795.8(3) Å3and Z = 2. The crystal structure, which has been refined to R1 = 0.0456 on the basis of 1186 unique reflections with Fo > 4σF, is a framework of corner-, edge- and face- sharing Cu and Al octahedra and PO4 tetrahedra.

Phase transitions in disordered lead iron niobate: X-ray and synchrotron radiation diffraction experiments

1997 ◽  
Vol 102 (5) ◽  
pp. 347-352 ◽  
Author(s):  
Vincent Bonny ◽  
Michel Bonin ◽  
Philippe Sciau ◽  
Kurt J. Schenk ◽  
Gervais Chapuis
Keyword(s):  
Phase Transitions ◽  
Synchrotron Radiation ◽  
X Ray ◽  
Synchrotron Radiation Diffraction ◽  
Iron Niobate

scholarly journals Protein microcrystallography using synchrotron radiation

IUCrJ ◽  
2017 ◽  
Vol 4 (5) ◽  
pp. 529-539 ◽  
Author(s):  
Masaki Yamamoto ◽  
Kunio Hirata ◽  
Keitaro Yamashita ◽  
Kazuya Hasegawa ◽  
Go Ueno ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Data Collection ◽  
Diffraction Data ◽  
Structure Determination ◽  
Structural Features ◽  
X Ray ◽  
Data Collection Strategy ◽  
Technological Developments ◽  
Novel Method

The progress in X-ray microbeam applications using synchrotron radiation is beneficial to structure determination from macromolecular microcrystals such as smallin mesocrystals. However, the high intensity of microbeams causes severe radiation damage, which worsens both the statistical quality of diffraction data and their resolution, and in the worst cases results in the failure of structure determination. Even in the event of successful structure determination, site-specific damage can lead to the misinterpretation of structural features. In order to overcome this issue, technological developments in sample handling and delivery, data-collection strategy and data processing have been made. For a few crystals with dimensions of the order of 10 µm, an elegant two-step scanning strategy works well. For smaller samples, the development of a novel method to analyze multiple isomorphous microcrystals was motivated by the success of serial femtosecond crystallography with X-ray free-electron lasers. This method overcame the radiation-dose limit in diffraction data collection by using a sufficient number of crystals. Here, important technologies and the future prospects for microcrystallography are discussed.

Preparation and preliminary X-ray diffraction studies of a new crystal form of L-asparaginase from Escherichia coli

1999 ◽  
Vol 55 (9) ◽  
pp. 1616-1617
Author(s):  
I. Polikarpov ◽  
R. T. de Oliveira ◽  
J. Abrahão-Neto
Keyword(s):  
Escherichia Coli ◽  
Synchrotron Radiation ◽  
Crystal Form ◽  
Asymmetric Unit ◽  
Chemotherapeutic Drug ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Synchrotron Radiation Diffraction

L-Asparaginase is an enzyme which hydrolyzes asparagine to produce aspartic acid and ammonia. It is an effective chemotherapeutic drug, especially in the treatment of acute lymphoblastic leukaemia in children. The enzyme from Escherichia coli was crystallized in a new crystal form with space group C2, unit-cell parameters a = 76.3 (0), b = 134.6 (2), c = 64.8 (7) Å, β = 110.5 (1)° and a dimer in the asymmetric unit. Synchrotron-radiation diffraction data have been collected to 1.95 Å resolution.

The structure of cimetidine (C10H16N6S) solved from synchrotron-radiation X-ray powder diffraction data

1991 ◽  
Vol 24 (3) ◽  
pp. 222-226 ◽  
Author(s):  
R. J. Cernik ◽  
A. K. Cheetham ◽  
C. K. Prout ◽  
D. J. Watkin ◽  
A. P. Wilkinson ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Powder Diffraction Data ◽  
X Ray

Structural study of (Nd1.85, Ce0.15)CuO4 superconducting singlecrystal by x-ray synchrotron radiation diffraction

1991 ◽  
Vol 185-189 ◽  
pp. 543-544 ◽  
Author(s):  
P. Bordet ◽  
J.L. Hodeau ◽  
M. Marezio ◽  
D.B. McWhan ◽  
R.J. Melville ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Structural Study ◽  
X Ray ◽  
Synchrotron Radiation Diffraction

scholarly journals Contemporary X-ray electron-density studies using synchrotron radiation

IUCrJ ◽  
2014 ◽  
Vol 1 (5) ◽  
pp. 267-280 ◽  
Author(s):  
Mads R. V. Jørgensen ◽  
Venkatesha R. Hathwar ◽  
Niels Bindzus ◽  
Nanna Wahlberg ◽  
Yu-Sheng Chen ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Diffraction Data ◽  
Bragg Diffraction ◽  
Anomalous Scattering ◽  
Future Directions ◽  
X Ray ◽  
Conventional Radiation ◽  
Radiation Sources ◽  
Systematic Effects

Synchrotron radiation has many compelling advantages over conventional radiation sources in the measurement of accurate Bragg diffraction data. The variable photon energy and much higher flux may help to minimize critical systematic effects such as absorption, extinction and anomalous scattering. Based on a survey of selected published results from the last decade, the benefits of using synchrotron radiation in the determination of X-ray electron densities are discussed, and possible future directions of this field are examined.

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