نتایج جستجو برای: triclinic system

تعداد نتایج: 2231930  

Journal: :Molecules 2012
Marappan Sathish Kun'ichi Miyazawa

Fullerene nanowhiskers (FNWs) composed of C(60) fullerene molecules were prepared using the liquid-liquid interfacial precipitation (LLIP) method in the carbon-disulfide (CS(2)) and isopropyl alcohol (IPA) system. The electron microscopic images reveal the formation of non-tubular FNWs. The X-ray diffraction (XRD) pattern studies indicate the presence of fcc crystalline structure and unusual tr...

Journal: :Acta Crystallographica Section B Structural Science 2007

Journal: :Physical chemistry chemical physics : PCCP 2013
Thomas K Wallace Ross H Colman Abbie C McLaughlin

A study of the magnetic and structural properties of the double perovskite Ba2GdMoO6 has been performed. The crystal structure distorts from the ideal cubic (Fm3m) structure to the tetragonal space group I4/m at 220 K, before undergoing a second distortion to a triclinic system (I1) at 80 K. The phase transition to triclinic symmetry is also evident in magnetic susceptibility measurements. The ...

دوسک, میکائیل, طباطبایی, معصومه, پوجارویا, میکاسل,

A nickel complex with pyridine-2,6-dicarboxylic acid formulated as [Ni(pydcH)2].3H2O was synthesized and its crystal structure determined with single-crystal X-ray at diffraction temperatures (296 K and 120 K).  Pyridine-2,6-dicarboxyli acid  deprotonated on one group of COOH and two pydcH- anion is coordinated to Ni(II) atom as a tridentate ligand forming a distorted octahedral environment. Th...

2009
Saeed Ahmad Muhammad Ashraf Shaheen Helen Stoeckli-Evans

THE TITLE COMPOUND (SYSTEMATIC NAME 2-mercaptoethan-aminium chloride), C(2)H(8)NS(+)·Cl(-), the hydro-chloride salt of cysteamine, in contrast to the previously reported triclinic polymorph [Kim et al. (2002 ▶). Polyhedron, 21, 225-228], crystallized in the monoclinic crystal system. In the crystal, the cysteaminium cations are linked to the chloride anions via one S-H⋯Cl and three N-H⋯Cl hydro...

Journal: :Acta Crystallographica Section E Structure Reports Online 2009

2006
Vanessa K. Peterson Craig M. Brown Richard A. Livingston

The hydration of Mg-stabilized triclinic and monoclinic tricalcium silicate samples were studied using quasielastic neutron scattering to follow the fixation of hydrogen into the reaction products and by applying hydration models to the data. The quantity of Ca(OH)2 produced during hydration was also determined using inelastic neutron scattering. The monoclinic form was found to be intrinsicall...

Journal: :Physical review letters 2016
Mathias Schubert

A coordinate-invariant generalization of the Lyddane-Sachs-Teller relation is presented for polar vibrations in materials with monoclinic and triclinic crystal systems. The generalization is derived from an eigendielectric displacement vector summation approach, which is equivalent to the microscopic Born-Huang description of polar lattice vibrations in the harmonic approximation. An expression...

2010
Parashuram Mishra

A new ligand was made by coupling gentamicin and amoxicillin. It is proposed that these effects result from complex formation of ligand with Co (II), Ni (II), Cu (II) and Bi (V). Metal coordination to novel ligand was studied by various spectroscopic techniques. The crystal system, lattice parameters, unit cell, particle size and volume were determined by XRPD. The crystallographic data of comp...

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