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Roy3,c* 1Department of Physics, Marwari College, Ranchi-834001, Jharkhand, India. 2Department of Chemistry, St.
In this formula, the A-site cation is typically larger than the B-site cation, resulting in a specific crystal structure known as the perovskite structure.
The space group associated with this crystal structure is R3c.
The space group assigned to this structure is Pbnm.
Crystallography and chemistry of perovskites. arxiv preprint cond-mat/0506606

The chemical structure of obtained PMMA was confirmed by FT-IR and 1H NMR.
RESULTS AND DISCUSSION Structure of obtained PMMA Fig.1.
FT-IR spectrum of PMMA polymerized in the presence of ionic liquid The structure of PMMA was confirmed by FTIR and 1H NMR.
The chemical structure of obtained PMMA were characterized by FT-IR and 1H NMR .
[6] Ionic liquids: industrial applications for green chemistry.Rodgers R, Seddon K, editors.

The composite polymer electrolyte materials has become an intersection of many disciplines including materials science, chemistry, physics, and the content may lead to the field of new energy materials, in particular, is a new technological revolution in the field of battery materials, which study of the problem will continue and in-depth.
Polymer matrix Solid polymer electrolyte matrix type of material are more linear, comb, and network structure, the structure can be divided into common polymer matrix, PEO, PMMA, PVDF, PAN, the PPO, PEG and other polymers as well asthe formation of copolymers of these polymers on the basis of, such as PVC-the PEO, of PEO-PVP, PEO / P (VDF-HFP), P (MMA-AN), P (MMA-AN-ST), P (VDF-HFP).
McLachlan, An equation for the conductivity of binary mixtures with anisotropic grain structures[J], Journal of Physics C: Solid State Physics, 1987, 20(7): 865-878
Wieczorek, Ionically conducting polyether composites[J], Canadian Journal of Chemistry, 1996, 74(11): 2106-2113
Striebel, et al., FTIR characterization of PEO+LiN(CF3SO2)2 electrolytes[J], Journal of Electroanalytical Chemistry, 1996, 408 (1–2):113-118

This type of arrangement is referred to as a normal spinel structure [2].
Surface defects result in a magnetic spin glass structure.
The powder specimen is thus different to a bulk specimen because surface structure defects result in a magnetic spin glass structure.
The experimental value of the per molecular magnetic moment is lower than the theoretical value because surface structure defects result in a magnetic spin glass structure.
[7] J.S Jiang, L Gao and F.L Yang, The Seminary Chemistry Paper, 1, 3(1999).

Synthesis, crystal structure and antibacterial activity of one-dimensional chain calcium(Ⅱ) complex 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: Calcium complex; Synthesis; Crystal structure; Antibacterial activity Abstract.
The structure was solved by direct methods and refined by full-matrix least-squares techniques on F2.
The structure was solved by direct methods [8] using SHELXL-97 and expanded using Fourier techniques.
Results and discussion Crystal Structure Perspective view of the molecule in a unit cell is shown in Fig. 1.

Theoretical Calculations The lithium-magnesium phosphate is orthorhombic structure, with space group Pnma, and belongs to the ordered olivine-type structures [20].
For 3d7 ions in rhombically distorted octahedra, g factors and hyperfine structure constants normally exhibit largely consistent anisotropies related to the local structures of the impurity centers.
Royal Society of Chemistry, London, Food Irradiation Technologies (2017) pp. 66-75
Majling, Crystal structure of lithium magnesium phosphate, LiMgPO4: Crystal chemistry of the olivine-type compounds, J.
Dong, EPR Investigation of the Structure of a Rhombic Co2+ Center in an NaF Crystal, Z.

.% sample had the smoothest surface and the most amorphous structure, correlating with the highest ionic conductivity.
Numerous studies have investigated the structure and chemical composition of SLEI [1].
Pure MG49 (0 wt.% salt) exhibits no crystalline structures; the presence of GO produces a smooth surface that allows greater light transmission.
At higher salt concentrations (35–45 wt.%), numerous crystalline structures appear, making the films coarser compared to lower concentrations.
Ahmad, Influence of binary lithium salts on 49% poly(methyl methacrylate) grafted natural rubber based solid polymer electrolytes, Arabian Journal of Chemistry, 13 (2020) 3351–3361

Preparation and Characterization of Rare Earth Ions Doped Fluoride Core-shell Up-conversion Luminescence Nanomaterials Jun Zhang1, a, *, Haiou Shen1, b, Shunhao Wang1, c, Yanli Li1, d, Hui Xin1, e, Chuntao Zhu1, f and Xiangda Peng1, g 1School of Chemistry and Chemical Engineering, Inner Mongolia University, 235 West University Road, Hohhot 010021, China azhangjundoc@sina.com, bshoc6179@163.com, ctomwsh@126.com, dzhanghaoowen@163.com, exinhui1128@163.com, f11265294@qq.com, gyumipxd@126.com Keywords: Core-shell structure, Up-conversion, Preparation, Characterization Abstract.
In this work, a multi-functional NaYF4:Yb3+,Er3+@TiO2 core-shell structure nanocomposite was synthesized.
Structure analysis of the up-conversion NPs.
The core-shell structure is clearly observed in the TEM images.
The XRD pattern also indicates the formation of the NaYF4:Yb3+,Er3+@TiO2 core–shell structure.

Yttrium (Y3+) ion with an empty 4f shell exhibits good stability, xenotime structure and tetragonal symmetry [16, 17].
Hence, particle substitutions of lanthanides (Ln) do not destroy the crystal structure of the host lattice (YPO4).
The HRTEM shows samples with rod-like structures with little to no agglomeration in the particles.
Isao, The preparation of rare earth phosphate fine particles in an emulsion liquid membrane system, Journal of Materials Chemistry 12, no. 4 (2002) 1053-1057
Chemistry of Materials 6, no. 9 (1994): 1465-1475

Preparation and Properties of 1,8-Naphthalimide Derivatives Grafted onto Chitosan Guang-hua Zhanga, Li-juan Liub, Wei-ling Sunc Key laboratory of Auxiliary Chemistry & technology for Chemical Industry, Ministry of Education.
The structures of compounds was characterized by FT-IR．Thermal stability and fluorescence spectra of the target product were investigated.
Acknowledgements This work was financially supported by the Shaanxi Natural Science Foundation (2009JM2010), Natural Science Foundation of Shaanxi education department (09JK801) and The Program of Key laboratory of Auxiliary Chemistry & technology for Chemical Industry, Ministry of Education of China (ZK200801).