Academic literature on the topic 'Monoclinic Crystal system'

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Journal articles on the topic "Monoclinic Crystal system"

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Masilamani, V., J. Shanthi, and V. Sheelarani. "Growth and Analysis of NSH and KMNSH Crystals by Slow Evaporation Technique." ISRN Condensed Matter Physics 2014 (March 24, 2014): 1–5. http://dx.doi.org/10.1155/2014/678567.

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Nickel sulphate hexahydrate (NSH) and potassium magnesium nickel sulphate hexahydrate (KMNSH) single crystals were grown by slow evaporation method. The grown NSH crystal was found to crystallize in tetragonal system with space group P41 21 2 and KMNSH in monoclinic system with space group P121/c. The optical band gap energies of the grown crystals using UV-Vis spectral results for the doped and undoped NSH crystals were calculated. The presence of various functional groups in the crystal was identified by FTIR analysis. The thermal behaviour of the grown crystal has been studied by TGA/DTA an
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Aliyev, Y. I., N. A. Ismayilova, R. F. Novruzov, et al. "Electron structure and density of states’ calculations of Ag2S and Ag2Se crystals from first-principle." Modern Physics Letters B 33, no. 21 (2019): 1950242. http://dx.doi.org/10.1142/s0217984919502427.

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The results of calculations of the electron structure for Ag2S and Ag2Se crystals from first-principle in the framework of density functional theory (DFT) are presented in this work. The origin of the bands from [Formula: see text] and [Formula: see text] electron states of Ag, S and Se atoms are investigated. It was established that the orthorhombic Ag2Se crystal shows semiconductor properties in P2221 and P212121 space groups and semimetallic properties in Im-3m space groups with cubic crystal system. Monoclinic crystal type of Ag2S shows semiconductor properties in P21/c space group. Howeve
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Theocaris, Pericles S., and Dimitrios P. Sokolis. "Spectral decomposition of the linear elastic tensor for monoclinic symmetry." Acta Crystallographica Section A Foundations of Crystallography 55, no. 4 (1999): 635–47. http://dx.doi.org/10.1107/s0108767398016766.

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The compliance fourth-rank tensor related to crystalline or other anisotropic media belonging to the monoclinic crystal system is spectrally decomposed for the first time, and its characteristic values and idempotent fourth-rank tensors are established. Further, it is proven that the idempotent tensors resolve the stress and strain second-rank tensors into eigentensors, thus giving rise to a decomposition of the total elastic strain-energy density into non-interacting strain-energy parts. Several examples of representative inorganic crystals of the monoclinic system illustrate the results of t
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Rybakov, Victor, Vladimir Chernyshev, Ksenia Paseshnichenko, and Victor Sheludyakov. "Crystal structure of salts luminol with Li, Na and K." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1021. http://dx.doi.org/10.1107/s2053273314089785.

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The molecular and crystal structures of new drugs Tamerit® (A) and Galavit® (B) which possess high effective immunomodulator, anti-inflammatory and anti-oxidant properties, were studied by single crystal and powder X-ray diffraction methods. As shown, A and B are aminodihydrophtalazindion (luminol) sodium salts, but A - is a dihydrate form and B anhydrous one, moreover it is a mixture two different crystal phases B1 and B2. The phase transition B1 <---> B2 is not registered by DSC method [1]. Crystal data for A: monoclinic system with a = 8.3429(4), b = 22.0562(11), c =5.2825(2) Å, β = 9
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Matthies, Siegfried, and Hans-Rudolf Wenk. "Transformations for monoclinic crystal symmetry in texture analysis." Journal of Applied Crystallography 42, no. 4 (2009): 564–71. http://dx.doi.org/10.1107/s0021889809018172.

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Monoclinic crystals can be described in two settings: in the first setting theC2rotation axis is parallel to thezaxis and in the second setting it is parallel to theyaxis. Transformations of lattice parameters, Miller and zone indices, and atomic coordinates is straightforward; the situation is far more complex for texture analysis with orientation distributions and corresponding representations. This article gives explicit transformations that need to be applied, not only for texture analysis but also for calculations of physical properties of materials with preferred orientation. In texture
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Boopathi, K., S. Moorthy Babu, R. Jagan, S. Athimoolam, and P. Ramasamy. "Synthesis, crystal growth, physio-chemical characterization and quantum chemical calculations of NLO active metal–organic crystal: dibromo(4-hydroxy-l-proline)cadmium(ii) for non-linear optical applications." New Journal of Chemistry 42, no. 21 (2018): 17464–77. http://dx.doi.org/10.1039/c8nj02548g.

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Single crystals of DB4HPC, a new metal–organic complex, have been grown from saturated solution for the first time. DB4HPC crystallizes in a monoclinic crystal system with noncentrosymmetric space group P2<sub>1</sub> and is thermally stable up to 240 °C.
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Kondo, Shin, Akira Kaji, Kazuyuki Yuguchi, Takashi Tonozuka, Yoshiyuki Sakano та Shigehiro Kamitori. "Crystalization and preliminary x-ray analysis of thermoactinomyces vulgaris R-47 α-amylase 1". Protein & Peptide Letters 7, № 3 (2000): 197–200. http://dx.doi.org/10.2174/092986650703221206125753.

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Abstract: Crystals of Thermoactinomyces vulgaris R-47 a-amylase I, hydrolyzing cyclodextrins and pullulan, were grown by the vapor diffusion methods in two crystal forms with minor variations. The diffraction data were collected up to 2.5 A resolution and both crystals were belong to monoclinic system and a space group of C2 with cell dimensions ofa = 123.6 A, b = 51.7 A, and c = 109.1 A , 13 = 104.2° (crystal form 1) and a= 122.5 A, b = 55.0 A, and c = 108.7 A,13 = 103.8° (crystal form 2).
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RĂDUCĂ, Mihai, Ciprian I. Raț, and Mihaela CRISTEA. "Crystal structure and Hirshfeld surface analysis of (Z)-2-phenyl-4-((4,6,8-trimethylazulen-1-yl)methylene)oxazol-5(4H)-one." Revue Roumaine de Chimie 67, no. 10-12 (2023): 591–96. http://dx.doi.org/10.33224/rrch.2022.67.10-12.08.

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The molecular structure of (Z)-2-phenyl-4-((4,6,8-trimethylazulen-1-yl)methylene)oxazol-5(4H)-one (1) was determined single-crystal X-ray diffraction. The crystal presents a monoclinic crystal system, space group P21/n, a = 7.0706(3) Å, b = 18.7978(7) Å, c = 13.7059(7) Å, β = 103.013(5) °, V = 1774.89(14) Å3. In the crystals of 1, are present strong π-π stacking interactions, with an average distance of 3.54 Å between centroids.
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Sreedevi, R., A. S. I. Joy Sinthiya, S. C. Vella Durai, T. Balu та P. Murugakoothan. "Структура, ріст та оптичні характеристики монокристалів сульфанілату гуанідинію (GSA)". Physics and Chemistry of Solid State 25, № 2 (2024): 278–83. http://dx.doi.org/10.15330/pcss.25.2.278-283.

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Guanidine Sulphanilate (GSA) single crystal was grown by slow evaporation growth method. Single crystal X-ray diffraction studies show that the crystal grows in a centro symmetric monoclinic system and its space group is P21/c. Optical studies were carried out using UV visible spectroscopy and the grown crystal shows the the lower cutoff wavelength of 220 nm. Photoluminescence studies show that GSA crystals have good luminescence properties. Laser damage threshold was found to be 0.24GW/cm2. Nonlinear optical studies show green light emission.
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Yamane, Shuhei, Kenji Matsumoto, Fumiko Kimura, and Tsunehisa Kimura. "Crystal Structure Analysis of Magnetically Oriented D-Arabinitol Microcrystal." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1139. http://dx.doi.org/10.1107/s2053273314088603.

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We have proposed magnetically oriented microcrystal array (MOMA) technique as a new technique of crystal structure analysis. With this technique, single crystal X-ray diffraction analysis is made possible from a microcrystalline powder. Biaxial crystals, having three different values of magnetic susceptibility (χ1&gt;χ2&gt;χ3), are aligned three dimensionally under a frequency-modulated elliptical magnetic field. Biaxial microcrystal suspended in an ultraviolet (UV) light-curable monomer matrix is aligned three dimensionally under the magnetic field, followed by consolidation of the alignment
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Books on the topic "Monoclinic Crystal system"

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Hellner, E. Structure type descriptions for intermetallic phases in the monoclinic system. Fachinformationszentrum Karlsruhe, 1993.

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Book chapters on the topic "Monoclinic Crystal system"

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Julian, Maureen M., Carla Slebodnick, and Francis T. Julian. "Monoclinic Crystal System." In Foundations of Crystallography with Computer Applications, 3rd ed. CRC Press, 2024. http://dx.doi.org/10.1201/9781003360209-10.

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"monoclinic (crystal(lographic)) system." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_132641.

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Glazer, A. M. "2. Symmetry." In Crystallography: A Very Short Introduction. Oxford University Press, 2016. http://dx.doi.org/10.1093/actrade/9780198717591.003.0002.

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In order to explain what crystals are and how their structures are described, we need to understand the role of symmetry, for this lies at the heart of crystallography. ‘Symmetry’ explains the different types of symmetry: rotational, mirror or reflection, point, chiral, and translation. There are thirty-two point groups and seven crystal systems, according to which symmetries are present. These are triclinic, monoclinic, orthorhombic, tetragonal, trigonal, hexagonal, and cubic. Miller indices, lattices, crystal structure, and space groups are described in more detail. Any normal crystal belongs to one of the 230 space group types. Crystallographers generally use the International Notation system to denote these space groups.
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Khedhiri, Lamia. "Crystal Structure of [C17H22N2]3[P6O18][H2O]8." In Crystal Growth - Technologies and Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108160.

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[C17H22N2]3[P6O18][H2O]8., a new organic cyclohexaphosphate, was synthesized as single crystals and grown by solution growth method. The crystal structure of the grown product was determined by single crystal X-ray diffraction analysis. The title material crystallized in the monoclinic system of the C2/c space group. The P6O186− ring anions and some water molecules form layers spreading around (b, c) planes via O-H…O hydrogen bonds. Between these inorganic layers are anchored organic cations, which establish H-bonds to interconnect the different adjacent layers and so contribute to the cohesion of the three dimensional lattice. The organic and inorganic rings adopt a chair conformation with different geometrical characteristics due to their different size and flexibility. The title compound was further characterized by FT-IR and NMR spectroscopy.
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Cheetham, Anthony K. "Ab initio structure solution with powder diffraction data." In The Rietveld Method. Oxford University PressOxford, 1993. http://dx.doi.org/10.1093/oso/9780198555773.003.0015.

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Abstract There is a long and well-established tradition of using powder diffraction methods to study crystal structures. The earliest examples were inevitably concerned with the structures of simple materials such as iron metal (Hull 1917), and although for many decades powder methods were used predominantly as a means of qualitative analysis, a number of structure determinations, e.g. x- and ,G-UF 5 (Zachariasen 1949), were reported. Such studies were largely based upon geometrical considerations and trial-and- error methods, although Zachariasen and Ellinger (1963) were able to solve the monoclinic structure of ,G-plutonium by a manual direct-methods procedure. Nevertheless, powder methods were largely restricted to studies on simple structure types until the advent of the Rietveld method in 1969 (Rietveld 1969) extended their scope to the refinement of complex, low symmetry systems with as many as 50 atoms in the asymmetric unit (Cheetham and Taylor 1977; Hewat 1986). This important development has inevitably led to a re-examination of the methods that are available for the solution of unknown structures, and it is with this exciting challenge that the present chapter is concerned. We stress. however, that the Rietveld method continues to play a vital role in the subsequent refinement, which is necessary in order to complete the structure determination.
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Conference papers on the topic "Monoclinic Crystal system"

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Rao, S. M., K. X. He, R. B. Lal, et al. "New nonlinear optical materials in the mixed (2,4-dinitrophenyl)-L-alanine (DPA) and 2-methyl-4-nitroaniline (MNA) system: crystal growth and investigation." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.cwf47.

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Among innumerable organic materials investigated for their exceptional nonlinear optical (NLO) properties 2-methyl-4-nitroaniline (MNA) has one of the largest second-order nonlinear coefficients, χ(2)(d12 = 38 and d11 = 250 pm/V),1 crystallizing in the monoclinic space group Cc.1 Large crystals of MNA could not be grown from either solution or melt. Therefore, we tried crystallizing mixtures of methyl-(2,4-dinitriphenyl)-aminopro-panoate (MAP) and MNA2 from organic solutions. Large prismatic orange-red colored crystals of an equimolar complex crystallized in the monoclinic space group P21 with
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Barrionuevo, Manoel V. F., Yuri Dezotti, Rafael Añez, Wdeson Pereira Barros, and Miguel A. San-Miguel. "Structural, Electronic, Magnetic and Adsorption Study of a Cu–3,4–Hpvb MOF." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol202034.

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Herein, we present a theoretical study of a proposed metal-organic framework (MOF) based on Cu complexes of 3{2-(4-pyridinyl)vinylbenzoic} acid (3,4–Hpvb), which belongs to a monoclinic crystal symmetry system of type P121/c1. By using periodic boundary conditions (PBC) within the density functional theory (DFT) framework, as well as through the density of states (DOS) analysis, we suggest that thanks to the metal center, the bulk material has a magnetic character of about 2.27 μB/cell. All the coordinated atoms presented a slight magnetization character, and more interestingly, the carboxylic
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Shirodkar, Nishant, Samantha Rocker, and Gary D. Seidel. "Structural Health Monitoring of Solid Rocket Propellants Using Piezoresistive Properties of Dispersed Carbon Nano-Tube Sensing Networks." In ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-8250.

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There has been increasing focus in the area of in-situ structural health monitoring since the advent of embedded nano-composites. This experimental research investigates the structural health monitoring abilities of polymer bonded energetics embedded with a uniformly dispersed but randomly oriented carbon nanotube (CNT) sensing network within the polymer binder. A common formulation of the recent solid propellants consists of ammonium perchlorate (oxidizer) and aluminum powder (combustive fuel)-often shaped using a polymer binder, rather than the older techniques of power pressing. Since this
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