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Crystal structure of Hollandite oxides.
Figure 1 shows the crystal structure of a-MnO2.
Crystal structures of the oxide products were identified by power X-ray diffraction (XRD, Rigaku RINT-2000 system, Cu-Ka).
Each sample was a single phase of the hollandite-type structure.
From the SEM images, all the hollandite particles have a needle-like structure with a length of ca. 100-500 nm and a diameter of ca. 30 nm.

Structural Characteristics and Electrochemical Properties of Mg-Ni-Cu-Y Alloy Synthesized by Mechanical Alloying Limin Wang 1a, Xinbo Zhang 1,2,b and Yaoming Wu 1,c 1 Key Lab of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin street, Changchun 130022, China. 2 Graduate School of the Chinese Academy of Sciences a lmwang@ciac.jl.cn, beboat@ciac.jl.cn, cymwu@ciac.jl.cn Keywords: Magnesium alloy; Mechanical alloying; Structure; Electrochemical properties Abstract.
Recently, the MA process, structure and properties of Mg-based materials formed with MA and special physical/chemical properties have been discussed in the literature [5,6].
Results and Discussions Structure Characteristics.

Methodology The thermodynamic program, HSC Chemistry [20], was used to calculate the Gibbs free energy of the proposed chemical reactions.
Assuming that the phosphate structure remains then the reaction between the phosphate, RePO4, and ABF takes place.
Dacheux, Crystal chemistry of the monazite structure, Journal of the European Ceramic Society. 31 (2011) 941 - 976
[20] Outotec Research, HSC Chemistry, 2014
Harman, Chemistry and Chemical Reactivity, 5th ed.: Thompson Brooks/Cole, 2003

All the Nuclear Steam Supply System (NSSS) components of FBR are thin walled structure and require manufacture to very close tolerances under nuclear clean conditions.
The material of construction is Austenitic stainless steel 316 LN and 304 LN with controlled Chemistry and calls for additional tests and requirements as compared to ASTM standards.
Pickling and passivation, Testing with chemistry controlled demineralised water are salient steps in manufacturing.
Pickling and passivation, Testing with chemistry controlled demineralised water are salient steps in manufacturing.
Design for QA High operating temperature of the system and use of sodium as coolant due to its good heat transfer properties, stresses developed due to thermal transients are to be minimized by using thin walled structure.Sensitisation of stainless steel materials shall be kept low to avoid intergranular corrosion, pitting corrosion, intergranular stress corrosion cracking, loss of ductility etc., Distortion shall be kept minimum to avoid stress concentration and to maintain dimensional stability.Minimum heat input shall be used during welding.

The structures of the obtained polymers were characterized and confirmed with 1H-NMR measurement.
The chemical structure of the imidazolium based-anion exchange membranes (FPAEO –xMIM) was shown in Fig. 1.
Chemical structure of the AEM membrane The FPAEO-xMIM membranes were prepared via amination of the FPAEO-xBrTM with N-methyl imidazole followed by ion exchange.
In all, the 1HNMR spectrum was in good agreement with its chemical Structure.
Chen, “Steady-State dc and Impedance Investigations of H2/O2 Alkaline Membrane Fuel Cells with Commercial Pt/C, Ag/C, and Au/C Cathodes,” The Journal of Physical Chemistry B , vol. 110(42), pp. 21041–21049, 2006

Lattice constants, binding energy and atom valences (Mulliken) of structures.
Structures and Li intercalation sites of (a-b) VS2 bilayer and (c-d) VS2/graphene heterostructure.
In VS2 bilayer structure, there is a Coulomb repulsion force between the two layers of S.
Inorganic Chemistry, 2013, 52(17):9807-9812 [8] Shuijing, Sun, et al.
Journal of Materials Chemistry A, 2017, 5, 12445 [10] Li L, Raji A R O, Tour J M.

Micrographs taken with an optical microscope (Carl Zeiss Stemi 2000-CS) indicate a homogeneous structure of the obtained samples.
Conclusions Porous magnesium specimens with an open-cellular structure have been fabricated using powder metallurgical process.
The authors are grateful to colleagues from the Institute of Chemistry of FEB RAS (Vladivostok, Russia), namely S.L.
Fridman, Plasma chemistry, Cambridge University Press, New York, 2008
Choi, Industrial & engineering chemistry research. 31 (1992) 769.

Steam and Autoclave Treatments on Structure Characteristics of Steel Slag Qinglin Zhao1,a, Jochen Stark2,b, Ernst Freyburg2,c, Mingkai Zhou1,d 1School of Materials Science and Engineering of Wuhan University of Technology, Wuhan, 430070, China 2 F.
Together with the chemical analysis as well as XRD and DTA, effects of steam and autoclave treatments on structure characteristics of basic oxygen furnace slag (BOFS) and electric arc furnace slag (EAFS) are investigated.
As can be seen from Fig.6 - Fig.8, at the heating rate of 10 °C/min, in the heating process, the physical chemistry changing patterns of EAFS and BOFS are approximately the same.
Because of the shortage of iron and wuestite, the physical chemistry in the heating process shows variations.
DTA curves of BOFS characterize the obvious physical chemistry changing process respectively.

Šegan 1,d 1 Faculty of Chemistry, P.O.Box 158, 11001 Belgrade, Serbia and Montenegro 2 Faculty of Physical Chemistry, P.O.Box 137, 11001 Belgrade, Serbia and Montenegro a marijat@chem.bg.ac.yu, bubavka@ffh.bg.ac.yu, civanka@ffh.bg.ac.yu, dsegand@chem.bg.ac.yu Keywords: Ammonium Decavanadate, Conductivity, IR and Raman Spectra, Polyoxometalate (POM), Thermal Analysis, XRD.
Their chemistry, dictated by their remarkable structural and electronic properties, is the subject of intense interdisciplinary research activities in some major scientific areas: catalysis, material science and medicine.
X-ray powder and single crystal diffraction analysis confirmed that the structure of the obtained compound corresponds to ADV-6 and has triclinic space group [2, 5].
The structure and single crystal view are presented in Fig. 1 a) and b).
Fig. 1 View and structure of ADV-6 cage IR spectra of ADV-6 were analyzed taking into account characteristic groups: NH4+, OH and V-O.

Graphene, a single layer two-dimensional structure of sp2-bonded carbon, has attracted a great deal of interest in many fields due to its remarkable physicochemical properties [5-8].
In recent years, graphene-based materials have shown many promising applications for the sample preparation in the field of analytical chemistry [9-11].
Fig.1 Schematic diagram of enrichment protocol for peptide by graphene Results and Discussion The morphology and structure of graphene were investigated by FESEM and TEM.
It can be clearly seen that, graphene presented a characteristic feature of sheet-like structure with smooth and wrinkled surface.
Gu, Chemistry. 74(2011) 1090-1095 (In Chinese)