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The 19F chemical shift observed for ionic divalent crystalline fluorides is almost directly proportional to the F-Cation distance in the crystal structure.
The crystal structure of calcium FAP is shown schematically in Figure 1.
Figure 1 Schematic of the FAP crystal structure showing the two different calcium.
Elliot "Structure and Chemistry of Apatites" Elsevier Amsterdam (1994). 2.
Von Dreele, General Structure Analysis System, Los Alamos National Laboratory (1995).

The active functional groups in coal structure play great roles in the spontaneous combustion of coal.
Those functional groups account for a larger proportion of the coal structure, and they are generally inactive functional groups.
FT-IR study of the evolution of coal structure during the coalification process.
The investigation of chemical structure of coal macerals via transmitted-light FT-IR microspectroscopy.
Journal of Fuel Chemistry and Technolog.Vol.25 No.4, Aug. 1997

The most factors that influence these properties are the crosslinking density and molecular chain structure.
In recent years, the new epoxy resins and modifying the tradition epoxy resin have been made, like interpenetrating network method, chemistry copolymerization, the element epoxy resin synthesis and so on.
The molecular structure of p-SBPEPB is shown in Scheme 1.
Fig.2 is the SEM picture of the morphological structure of the zone fracture.
These indicated that the morphological structure of epoxy resin was improved by the addition of the LC epoxy resin.

For certain values of the equivalence ratio and oxygen content of air, the premixed flame structure shows temperature peak in the main reaction zone higher than the equilibrium value.
In study [7], reactions of HBr with radicals are involved in atmospheric chemistry and in the mechanism of operation of bromine-containing flame retardants.
The two-zone flame structure (with two heat-release-rate peaks) is formed in the trailing diffusion flame.
International Journal of Quantum Chemistry. 123(22) (2023) e27217
International Journal of Quantum Chemistry. 123(5) (2023) e27049

From the remaining mother liquor by precipitation with ethanol (1: 3), a polymer with a branched structure — pectic substances (PS) —was isolated [7].
From the data presented in Figures 1-4, it can be seen that the conditional yield stress of a solution of pectic substances, which characterizes the strength of the structure, is 0.08 Pa and that of a solution of oligosaccharides is 0.01 ÷ 0.07 Pa, which indicates that PV and OS are non-Newtonian fluids with a weak supramolecular structure.
Chemistry series. 8 (2005) 11-17
Slobodova, R.M Gorshkova, et al., Combined Fractionation of Protopectin Degradation Products, Fibre Chemistry, 51 (5) (2020) 333 - 339 [8] C Filisetti-cozzi, N.C.
Zenin The structured state of water as a basis for managing the behavior and safety of living systems: dis.

Structure and Composition of supported PtCu-LaOx Composite Multi-layer Membrane Electrode Bin Yang1,a and Tao Xu1 1School of Materials Science and Engineering, Kunming University of Science and Technology, 253 Xuefu Avenue, Kunming, Yunnan, 650093, China ayb0871@163.com Keywords: Structure, Composition, PtCu-LaOx, IBS, Fuel Cells.
We could found that Pt(111), Pt(200) and Pt(220) were main diffraction peak and phase composition was all fcc crystal structure of these samples.Moreover, 2θ of Pt(111) in A-1, B-1 and J-2 was 39.918°, 39.860° and 39.980°, they all greater than 2θ of Pt(111) in pure Pt.
From Fig. 1(b), diffraction peak of La2O3(222) and La2O3(440) in J-3 were belong to cubic system and Mn2O3 type crystal structure, and La2O3(222) intensity decreased and Pt(111) intensity enhanced observably, after that PtCu membrane had been deposited upon La2O3 membrane, owing to crystallinity of La2O3 in mixed interface layer between PtCu membrane and La2O3 membrane.
Nilsson: Nature Chemistry. 2 (2010), p. 454-460

The XRD patterns revealed that all the Cu3SnS4 samples had a polycrystalline structure.
Park, Review on Cu2SnS3, Cu3SnS4, and Cu4SnS4 thin films and their photovoltaic performance, Journal of Industrial and Engineering Chemistry 76 (2019) 39-74
Park, Review on Cu2SnS3, Cu3SnS4, and Cu4SnS4 thin films and their photovoltaic performance, Journal of Industrial and Engineering Chemistry 76 (2019) 39-74
Karrim, XRD and AFM studies of ZnS thin films produced by electrodeposition method, Arabian Journal of Chemistry 3(4) (2010) 243-249
Zahn, Raman scattering study of Cu3SnS4 colloidal nanocrystals, The Journal of Physical Chemistry C 118(47) (2014) 27554-27558

The micro-structure of jute fibre is shown in fiure 1.
Polyethylene (PE) has semicrystalline structure with more or less crystalline and amorphous portion.
A large number of profiles such as rod, tube, different types of structure can be produced by the pultrusion process [49,50,84].
Journal of Polymer and Biopolymer Physics Chemistry, 2014, Vol. 2, No. 4, 91-97 [79] Md.
[84] Vijay Kumar Thakur, Cellulose-Based Graft Copolymers: Structure and Chemistry Edition: 1st Chapter: 11Publisher: CRC Press 2015

Membrane gas separation: a review/state of the art [J], Industrial & Engineering Chemistry Research, 2009, 48, 4638-4663
Membrane-extraction ion mobility spectrometry for in situ detection of chlorinated hydrocarbons in water [J], Analytical Chemistry, 2010, 82, 4089-4096
Structure & strength of silica-PDMS nanocomposites [J], Polymer, 2010, 51: 1796-1804
Ion mobility spectrometry in analytical chemistry [J], Critical Reviews in Analytical Chemistry, 1990, 21: 321-355.

Strategic Development of Nanoemulsion Bases for Versatile Active Ingredient Incorporation Sukanya Thepwatee1,a*, Anchalee Pinket1,b and Sutthipong Rangauthok1,c 1Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok 10800, Thailand asukanya.t@sci.kmutnb.ac.th, bs6204011610663@email.kmutnb.ac.th, cs6204011636131@email.kmutnb.ac.th Keywords: Nanoemulsion, Formulation, Olive Oil, Low-Energy Method, D-Phase Emulsification Abstract.
The addition of a small amount of water initiates surfactant hydration, allowing the surfactants to arrange in a structured manner and trap the oil, thereby controlling droplet formation in the nanoemulsion.
The authors acknowledge the support of the Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok.
Ashaolu: Environmental Chemistry Letters Vol. 19 (2021), p. 3381-3395
Kim: Food Chemistry Vol. 272 (2019), p. 404-410.