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The crystalline structure of BLT ceramics was studied by X-ray diffraction method.
We also report the results of investigation of the thermal behaviour, microstructure and structure of prepared BLT ceramics.
X-ray structure analysis made it possible to calculate the density and compare it with the apparent density measured by the Archimedes method.
Lanthanum doping in BaTiO3 led to small changes in the lattice volume exhibiting the tetragonal structure of P4mm space group.
Toda, A novel high-k ‘Y5V’ barium titanate ceramics co-doped with lanthanum and cerium, Journal of Physics and Chemistry of Solids, 68 (2007) 650–664

Solvothermal Synthesis and Characterization of Hierarchical Calcium Carbonate Spheres Yinxia Chena, Xianbing Jib and Yulian Quanc Environmental Management College of China, Qinhuangdao 066004, China achyxsd@163.com, bjixianbing1981@163.com(corresponding author), cqylian@126.com Keywords: Calcium carbonate, Hierarchical structure, Solvothermal process, Polyvinylpyrrolidone.
The structures are fabricated by the reaction of Ca(CH3COO)2 with (CO(NH2)2) at 110 oC in diethylene glycol–water mixed solvents in the presence of polyvinylpyrrolidone.
Introduction Over the past years, the assembly of nanoparticles into organized and designed hierarchical superstructures has received much attention and has become an active research area in materials chemistry.
Biominerals have extraordinary optical and mechanical properties because of their hierarchical structures.

On the other hand, the lower binding affinity at higher temperature may be caused by reactions driven by particle motion and not by the inherent chemistry of the nanozeolite and Mn2+ [20].
Competitive adsorption of dyes and heavy metals on zeolitic structures.
Industrial and Engineering Chemistry Research. 2014;53:8188-8197.
Industrial and Engineering Chemistry Research. 2014;53:15576-15581.
Shi, On the mesoporogen-free synthesis of single-crystalline hierarchically structured ZSM-5 zeolites in a quasi-solid-state system, Chemistry 22 (2016) 7895–7905

Moreover, it is known that oxidizing annealing plays an important role in the nonlinearity of ZnO-based varistors by supplying oxygen excess, probably by diffusion along the grain boundaries, which modifies the grain boundary chemistry 2.
The modeling of the electrical behaviour of the varistors, as well as of their degradation in service, requires knowledge of the ZnO defect chemistry, and cation and anion self-diffusion experiments have been used as important tools to characterize the point defects in these materials.
The defect chemistry and diffusion data of undoped ZnO have been used to describe the behaviour of ZnO-based varistors.
Crystals of spinel structures are several µm in size, approximating regular octahedral shape, to a greater or lesser degree, indicating that this phase had sufficient time to freely adjust its shape to a near equilibrium form while being surrounded by a liquid phase.
The grain boundary chemistry of the varistor is complex due to the segregation of impurities and formation of new phases in the intergranular region.

Shrinkage causes shrinkage cracks, mainly observed on the structure’s surface.
This is how the cement stone coagulation structure is formed.
Adamson, Physical chemistry of surfaces, Chemistry, Moscow, 1979
Berlin, Basics of adhesion of polymers, Chemistry, Moscow, 1976
Eremenok, Stone and armored structures, High School, Kiev, 1981

Emulsion technique to synthesize polystyrene incorporated with surface modified and unmodified nano-TiO2 particles Mahdi Mirzababaei 1, a, *, Hossein Behniafar 2, b, Hamid Hashemimoghadam 3, c 1Faculty of Sciences, Islamic Azad University-Damghan Branch, Damghan, Iran 2School of Chemistry, Damghan University, 36715-364, Damghan, Iran 3Department of chemistry, Islamic Azad University-Damghan Branch, Damghan, Iran a mmirzababaei92@yahoo.com, b h_behniafar@du.ac.ir, ch.hashemimoghadam@damghaniau.ac.ir Keywords: Emulsion technique .Polystyrene.
The chemical structure of pure polystyrene (pure-PS), (mod TiO2), (PS/mod TiO2), and (PS/unmod TiO2) was confirmed by FT-IR spectroscopy.
To explain this phenomenon the structure of mod TiO2 was necessary to be discussed because the absorptive property was mainly decided by the chemical structure.
The structure of mod TiO2 samples were of typical donor–acceptor type π-conjugated structure, where the π-conjugated surface complexes was electron donor and Ti was electron acceptor due to its electron-deficient of d-orbital [11, 12].
These donor–acceptor type chemical structures led to the extension of π-conjugated via the electron deficient d-orbital and finally to the decrease of the electron-transition energy Because the 4,4′-MDI molecules were conjugated themselves, perfect π-conjugated systems were produced in mod TiO2 samples.

Electronic Structure of Muonated La2CuO4 A.F Rozlan1, a*, S.Sulaiman1, b, M.I.
The crystal structure for LCO is orthorhombic with the space group of Bmab (a = 5.352Å, b = 5.4Å and c = 13.157Å) as shown in Figure 1 [1] .
Figure 1: Crystal structure of La2CuO4 with three muon sites.
Adiperdana et al. suggested three final muon stopping positions after taking into account the effect of local deformation of crystal structure [5].
The calculation used band structure method using LCO supercell formed by 27 unit cells.

Synthesis, Crystal Structure and Antibacterial Activity of 1D Chain Ca(II) Coordination Polymer Xi-Shi Tai 1, a 1 College of Chemistry and Chemical Engineering, Weifang University, Weifang 261061, P.R.
China aemail: taixishi@lzu.edu.cn Keywords: Ca(II) coordination polymer; synthesis; characterization; biological activity Abstract. 1D chain Ca(II) coordination polymer was synthesized and characterized by elemental analysis, molar conductance, IR and single-crystal X-ray diffraction, The results of crystal structure show that each Ca(II) ion forms eight-coordinated and the complex formed one dimensional chain structure by the oxygen atoms of carboxylate and water bridged.
In previous work, the structures of some metal complexes with carboxylate ligands have been reported [4, 5].
Crystal structure determination and refinement A colourless block single crystal with dimensions of 0.26 mm×0.15 mm×0.10 mm was placed on a glass fiber and mounted on a Bruker smart CCD area detector.
In the crystal packing, the molecules form a one-dimensional chain structure by the oxygen atoms of carboxylate and water bridged (Fig. 2).

The time-temperature treatment of the liquid metal influence on the structure of the liquid metal.
The structure of the liquid metal influence on the character hardening and properties of the solidity samples in the one's turn.
That change connect by the intensive reconstructions of the structure near sequence [1] [2].
The structure parameters of the short-range order samples of the melt 10X23N18 at 1500 °C and pure liquid iron.
Tsepelev, Equilibrium and Nonequilibrium States of Metal Melts, Fundamental Studies of the Physical Chemistry of Metallic Melts, Academia Books, (2002) 214-228

The structure and performance of the microspheres were characterized by Infrared Spectroscopy (IR) and X-ray diffraction (XRD).
By comparing microscope figure 3, 4, we can see that adding quartz powder diameter is about 5 microns in micro-structure splinter in figure 3, and they bond close with each other.
The relatively wide of diffraction peaks and the sharp shape peak show that the crystal structure is relatively complete, which accord with TiO2 nano-structure, and its main structure is Anatase.
Obtained TiO2 film on composite microspheres, which maintains anatase structure in a wide temperature range, still has a smaller diameter.
Chemistry Letters, 1998, 8: 707 [5] Kato K, Tsuzuki A, Yorii Y, et al.