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Introduction Attapulgite （AT） is a family of fibrous hydrous magnesium silicates, the structure of which was first proposed by Bradley as Mg5Si8O20 (OH) 2 (OH2) 44H2O at 1940 years[1].
It was because that molecular structure of the attapulgite changed after calcination.
Preparation and rheology of polyamide-6/attapulgite nanocomposites and studies on their percolated structure[J].
Journal of Physics and Chemistry of Solids , Vol. 69(2008), p.1411 [12]Shen S., Yang M., Ran S. et al.
Structure and properties of fibrillar silicate/SBR composites by direct blend process[J].

Polysaccharides usually have a strong affinity for water, and, in the solid state, these macromolecules may have disordered structures that can be easily hydrated.
Thus, the new crystal structure of CS was created.
The different pH values for preparation of protein-loaded CS NPs could influence the encapsulation efficiency and NPs structures.
Mehrotra and Joydeep Dutta: Food Chemistry Vol. 114(2009), p. 1173-1182
Wu: Chinese Journal of Chemistry Vol. 20(2009), p. 79-83

Structure can be shown in Fig.1 , the crystal is interconnected by [SO4] tetrahedron, Ba2+ is linked among seven [SO4]2- tetrahedrons，and connected with twelve oxygen ions，and the coordination number is 12[1~3].
Fig.1 The crystal structure of barite Barite is a significant nonmetallic mineral, which process high specific gravity, low hardness, innocuity, non-magnetism, and cannot dissolve in water or acid, so it could be widely used as weighting agent in oil industry, and raw materials in producing lithopone, barium carbonate , barium carbonate ,coating and whitening agent in chemical industry.
While after roasting, the organics and other colored impurities can be volatilized, and the grade of barite can increase accordingly, but we need to pay more attention to roasting temperature, which can remove the organics and should not destroy the crystal structure of barite.
Activation and modification of barite As for the differential physical morphology and chemical structures , the surface properties between barite particles and organic polymer are significantly different ,therefore the compatibility and affinity between them may be distinct.
Analytical Chemistry. 2006, 78 (1): 304-305.

X-ray diffraction (XRD) was used to characterize the structure.
X-ray absorption spectroscopy (XAS) focusing on X-ray absorption near edge structure (XANES) was used to determine the oxidation number and phase of the catalyst.
XAS was selected as a tool to investigate the Fe oxidation state and its local structure.
Fig. 3 Normalized Fe K-edge X-ray absorption near edge structure (XANES) spectra of the various FexOy catalysts compared with Fe foil, FeCl3, FeO, Fe2O3 and Fe3O4 reference compounds Table 2 Absorption edge energies of the FexOy catalysts and % weight of iron phase by linear combination fitting.
Acknowledgements Financial supports from Department of Chemistry, Budget for Overseas Academic Conferences (BOAC), Faculty of Science, Graduate School, Kasetsart University, and National Nanotechnology Center, National Science and Technology Development Agency, Thailand Science Park are acknowledged.

It was remarkable that the CaP layer in both samples had a graded structure, i.e. the peak intensity of Ca and P gradually increased as that of Mg decreased at the boundary between the CaP layer and the Mg plate in the EDX line-scanning.
As a result, the graded structure was formed between Mg alloy and CaP layer.
References [1] Elliot J.C., General chemistry of the calcium orthophosphates, in: Structure and Chemistry of the apatites and other calcium orthophosphates, Elsevier Science B.V. , Amsterdam, 1994, pp.1-62 [2] S.
Yamamuro, Solutions able to reproduce in vivo surface-structure changes in bioactive glass-ceramic A-W., J.

X-ray Diffraction (XRD) is used to determine the crystal structure of the cathode materials by Xpert PANalytical with CuKα in the range 10o – 90o.
It can be seen that the coating of TiO2 does not change the structure of NMC 955 materials.
Journal of Energy Chemistry, 43(xxxx), 220–235. https://doi.org/10.1016/j.jechem. 2019.08.022 [5] Fan, Q., Lin, K., Yang, S., Guan, S., Chen, J., Feng, S., Liu, J., Liu, L., Li, J., & Shi, Z. (2020).
Surface Structure, Morphology, and Stability of Li(Ni1/3Mn1/3Co1/3)O2 Cathode Material.
Journal of Physical Chemistry C, 121(15), 8290–8299. https://doi.org/10.1021/acs.jpcc. 7b00896 [8] Herzog, M.

Introduction Damping materials is crucial to suppress vibration in structures.
For anisotropic MREs, clearly, as expected, curing the material under an applied magnetic field at elevated temperature allowed the particles to organize into chain-like structures.
Liang, ACS Sustainable Chemistry & Engineering, 4 (2016) 6981-6990
Shuib, Rubber Chemistry and Technology, (2019)
Lion, International Journal of Solids and Structures, 47 (2010) 2918-2936.

Therefore, in obtaining of sulfur compositions the main structure formation occurs on the stage of mixing the molten sulfur and filler.
Structure and properties of technical sulfur correspond to GOST 127.1-93.
Stabilizers are added to change the structure and increase the resistance of sulfur to atmospheric conditions.
Fu, Analysis of chemical composition and physical and mechanical properties of power plant ash for its further processing, Procedia Chemistry, 15 (2015) 272-279
Gusarova, Modification of Paving Asphalts with Sulfur, Russian Journal of Applied Chemistry, 76 (2003) 491-496

One-dimensional (1-D) nanostructure can possess more surface area than bulk structure [5] to react with water molecule and more continuous conducting pathways versus electron hopping to improved charge-transport properties than zero-dimensional (0-D) nanostructure [6].
The as-synthesized 6 hours ZnO (Fig. 1(a)) appear to be the most slender columnar structures and the sample shows sharp tip in the end of each NRs.
FESEM results confirmed that the NRs is covering the surface of ITO with well-aligned structure.
Cai, Hydrothermal growth of well-aligned ZnO nanorod arrays: Dependence of morphology and alignment ordering upon preparing conditions, Journal of Solid State Chemistry, 178 (2005) 1864-1873
Kamat, Understanding the Implication of Carrier Diffusion Length in Photovoltaic Cells, The Journal of Physical Chemistry Letters, 6 (2015) 4090-4092.

Fig. 1 Structure of chitosan[1] Being a nontoxic, hypoallergenic, and biocompatible substance, it is now intensively studied with the aim of prospective use in medicine and as a component of bioactive additives.
Chemical structure of chitosan and its capacity to be destroyed under the effect of hydroxyl radicals suggest it as a potential antioxidant.
The application prospect of chitosan and its derivatives in paper industry The structure of chitosan is similar to that of cellulose, except at C-2, where the hydroxyl group of cellulose is replaced by an amino group.
Chitin Chemistry(Trans MacMillan, London, U.K. 350(1992))
Khimiya khitina I khitozana (Chemistry of Chitin and Chitosan), Moscow, Nauka, 6-22(2002)