ChemInform Abstract: SrP3N5O: A Highly Condensed Layer Phosphate Structure Solved from a Nanocrystal by Automated Electron Diffraction Tomography.

ChemInform ◽  
2011 ◽  
Vol 43 (2) ◽  
pp. no-no
Author(s):  
Stefan J. Sedlmaier ◽  
Enrico Mugnaioli ◽  
Oliver Oeckler ◽  
Ute Kolb ◽  
Wolfgang Schnick
Keyword(s):  
Electron Diffraction ◽  
Diffraction Tomography ◽  
Condensed Layer

SrP3N5O: A Highly Condensed Layer Phosphate Structure Solved from a Nanocrystal by Automated Electron Diffraction Tomography

2011 ◽  
Vol 17 (40) ◽  
pp. 11258-11265 ◽  
Author(s):  
Stefan J. Sedlmaier ◽  
Enrico Mugnaioli ◽  
Oliver Oeckler ◽  
Ute Kolb ◽  
Wolfgang Schnick
Keyword(s):  
Electron Diffraction ◽  
Diffraction Tomography ◽  
Condensed Layer

scholarly journals A nanocrystalline monoclinic CaCO3precursor of metastable aragonite

2018 ◽  
Vol 4 (12) ◽  
pp. eaau6178 ◽  
Author(s):  
Péter Németh ◽  
Enrico Mugnaioli ◽  
Mauro Gemmi ◽  
György Czuppon ◽  
Attila Demény ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Structure Determination ◽  
Diffuse Scattering ◽  
Diffraction Tomography ◽  
Synthetic Material ◽  
Near Surface ◽  
Surface Conditions ◽  
Terrestrial Sediments ◽  
Living Organisms ◽  
New Phase

Despite its thermodynamical metastability at near-surface conditions, aragonite is widespread in marine and terrestrial sediments. It abundantly forms in living organisms, and its abiotic formation is favored in waters of a Mg2+/Ca2+ratio > 1.5. Here, we provide crystallographic evidence of a nanocrystalline CaCO3polymorph, which precipitates before aragonite in a cave. The new phase, which we term monoclinic aragonite (mAra), is crystallographically related to ordinary, orthorhombic aragonite. Electron diffraction tomography combined with structure determination demonstrates that mAra has a layered aragonite structure, in which some carbonates can be replaced by hydroxyls and up to 10 atomic % of Mg can be incorporated. The diagnostic electron diffraction features of mAra are diffuse scattering and satellite reflections along aragonite {110}. Similar features have previously been reported—although unrecognized—from biogenic aragonite formed in stromatolites, mollusks, and cyanobacteria as well as from synthetic material. We propose that mAra is a widespread crystalline CaCO3that plays a hitherto unrecognized key role in metastable aragonite formation.

scholarly journals Solving Challenging Crystallographic Problems with Automated Electron Diffraction Tomography (ADT)

2016 ◽  
Vol 22 (S3) ◽  
pp. 496-497
Author(s):  
Ute Kolb ◽  
Bastian Barton ◽  
Yasar Krysiak ◽  
Haishuang Zhao
Keyword(s):  
Electron Diffraction ◽  
Diffraction Tomography

Crystal Structures of Two Important Pharmaceuticals Solved by 3D Precession Electron Diffraction Tomography

2018 ◽  
Vol 22 (10) ◽  
pp. 1365-1372 ◽  
Author(s):  
Partha P. Das ◽  
Enrico Mugnaioli ◽  
Stavros Nicolopoulos ◽  
Camilla Tossi ◽  
Mauro Gemmi ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Crystal Structures ◽  
Diffraction Tomography ◽  
Precession Electron Diffraction

scholarly journals Crystal structure of vyacheslavite, U(PO4)(OH), solved from natural nanocrystal: a precession electron diffraction tomography (PEDT) study and DFT calculations

RSC Advances ◽  
2019 ◽  
Vol 9 (34) ◽  
pp. 19657-19661 ◽  
Author(s):  
Gwladys Steciuk ◽  
Seyedayat Ghazisaeed ◽  
Boris Kiefer ◽  
Jakub Plášil
Keyword(s):  
Crystal Structure ◽  
Density Functional Theory ◽  
Electron Diffraction ◽  
Dft Calculations ◽  
Density Functional ◽  
Diffraction Tomography ◽  
Functional Theory ◽  
Phosphate Mineral ◽  
Precession Electron Diffraction ◽  
Nano Crystal

The crystal structure of the U(iv)-phosphate mineral vyacheslavite has been solved from precession electron diffraction tomography (PEDT) data from the natural nano-crystal and further refined using density-functional theory (DFT) calculations.

scholarly journals Closing the gap between electron and X-ray crystallography

2015 ◽  
Vol 71 (6) ◽  
pp. 737-739 ◽  
Author(s):  
Enrico Mugnaioli
Keyword(s):  
Electron Diffraction ◽  
Structure Characterization ◽  
Diffraction Tomography ◽  
X Rays ◽  
Electron Crystallography ◽  
X Ray ◽  
X Ray Crystallography ◽  
Closing The Gap ◽  
Refinement Algorithm

The development of a proper refinement algorithm that takes into account dynamical scattering guarantees, for electron crystallography, results approaching X-rays in terms of precision, accuracy and reliability. The combination of such dynamical refinement and electron diffraction tomography establishes a complete pathway for the structure characterization of single sub-micrometric crystals.

scholarly journals Low-dose electron diffraction tomography (LD-EDT)

2019 ◽  
Vol 200 ◽  
pp. 12-19 ◽  
Author(s):  
Stéphanie Kodjikian ◽  
Holger Klein
Keyword(s):  
Electron Diffraction ◽  
Low Dose ◽  
Diffraction Tomography

scholarly journals Probing planar defects in nanoparticle superlattices by 3D small-angle electron diffraction tomography and real space imaging

Nanoscale ◽  
2014 ◽  
Vol 6 (22) ◽  
pp. 13803-13808 ◽  
Author(s):  
Arnaud Mayence ◽  
Dong Wang ◽  
German Salazar-Alvarez ◽  
Peter Oleynikov ◽  
Lennart Bergström
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electron Diffraction ◽  
Real Space ◽  
Diffraction Tomography ◽  
Planar Defects ◽  
Pd Nanoparticle ◽  
Transmission Electron ◽  
Nanoparticle Superlattices ◽  
Microscopy Techniques

Planar defects in Pd nanoparticle superlattices were revealed by a combination of real and reciprocal space transmission electron microscopy techniques. 3D electron diffraction tomography was extended to characterize mesoscale imperfections.

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