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Considering the bonding chemistry of [SiO4]-4 units, it is about the degree of SiO2-polymerization of vitreous phase or degree of SiO2-bonding (fSi) that can be calculated with eq (3) proposed by Appen [20]: , (3) where γ is a molar concentration of oxides in vitreous phase.
However, the structure of these aluminosilicates is mostly represented by crystalline phase.
According to this method, degree of crystallinity in aluminosilicates structure (from macro- to micro- and nanocrystalline structure) serves as a main indicator of reactivity.
Savkina, Structure and Properties of ZrO2-20%Al2O3 Ceramic Composites Obtained Using Additive Technologies, Materials. 11 (12) (2018) 2361. doi:10.3390/ma11122361 [13] A.
Glukhovsky, Alkali-activated cements, concrete and structures.

Fig. 2 shows the thin films exhibit (002) diffraction structure that belongs to the hexagonal wurtzite type of ZnO (JCPDS #36-1451).
The best crystallinity structure is close to wurzite (34.43o) structure [10].
This change is due to the water absorption by the structure of ZnO thin film.
The thin film with more crystalline structure gives high conductivity.
Yang, Effect of RF power on optical and electrical properties of ZnO thin films by magnetron sputtering, Materials Chemistry and Physics 73 (2001) 269-272

Often segregation processes of the active metals occur, from metallic core to its surface, and then being diffused in the structure of the corrosion layer or by their dissolution into the groundwater with their dispersion in the laying environment.
Inverse processes, from the laying environment to the artefact, are often stopping at the external layers of the corrosion crust, some small ray ions, particularly chloride anions, can penetrate to the metal structure of the alloy core, where they produce new kind electrochemical reactions when the metallic core is consumed.
In the case of silver artefacts found buried in archaeological sites, the main corrosion product is silver chloride, which originally is forming as a thin fragile layer, and subsequently under the influence of carbon dioxide and weak basic environment are forming scaly structures [9-14].
It should be noted that the corrosion products in the immediate vicinity of the core (A2) have a more compact structure unlike the ones from the surface, which are more porous (A3, A4 and A5).
Coates, Interpretation of Infrared Spectra, A Practical Approach, Encyclopedia of Analytical Chemistry, R.A.

Consequently, the present aim of this work was to study the chemical structure of borosilicate affected by strontium, its degradation behavior and biocompatibility was both extensively investigated.
The highly porous scaffold with interconnected structure was fabricated by replication method using polymer foam.
SEM image showed plate-like structure was uniformly covered on the glass surface of Sr-incorporated borosilicate (Fig. 3a,c), while only small nucleation could be detectable on borosilicate surface (Fig. 3b,d).
Through this unique porous structure, the uninterrupted process of dissolution-precipitation from glass surface should not be hindered.
The complete conversion to apatite is therefore optimistic due to its unique multilayer with porous structure.

Preparation and Properties of polyvinylpyrrolidone / Zinc Oxide Composite Nanofibers Guoqiang Xu1, a, Liguo Sun1, b, Shuhong Wang 1, c, Yang Xie 1, d, Cheng Wang1,e*, Pengfei Yan1, f ,Jian Zhang2,g ,Kuo Fu3,h 1 Key Laboratory of Polymer Functional Materials, School of Chemical Engineering and Material, Heilongjiang University, Harbin, 150080, China 2 Group Information Center, BASF SE, Ludwigshafen D-67056, Germany 3 School of Chemistry and Material Science, Northwest University, Xi’an, 710069, China.
The structures and properties of the composite nanofibers were investigated using X-ray diffraction (XRD), thermal gravimetric analysis (TGA), and Combined Stead State Fluorescence and Phosphorescence Lifetime Spectrometer (FLSP).
The surface morphology and the internal structure of the nanofibers were characterized using SEM and TEM, respectively.
As can be seen, when the concentration was relatively low (6 wt.%), much cross bonding structure was observed.

The bond of Si-O-Al and Si-O-Si characterized by Fourier Transform Infrared Spectroscope spectra confirmed the developed geopolymeric structure.
The XRD patterns of FM0.6 and FM0.7 exhibited amorphous characteristics with some crystalline structures as of quartz alpha, muscovite and dehydroxylated muscovite.
Inorganic polymers from alkali activation of metakaolin: Effect of setting and curing on structure.
Journal of Solid State Chemistry 200 (2013): 341–348

And then, the microscopic structure of two kinds soil sample with different water content are scanned to analyze the relationship between the matrix suction and the shear strengt of unsaturated silty sand.
The micro-structure of soil specimen shows that there are a lot of gas-liquid interface of free water and crescent water film inside of the unsaturated soil, the suction through the water film affect the soil strength.
The decreasing of suction effect area and (a) moisture content30% (b) moisture content 20% Fig.5 Microcosmic structure of the soil samples the increasing of suction formation of two growth and decline factors affect the shear strength of unsaturated silty sand.
Physics and Chemistry of the Earth,2007,32:832-849

Scientific management, organizational functions, administration, behavioral science, management science, systems science, management knowledge is increasingly interdisciplinary present trends, and the mathematics, physics, chemistry, biology, computer integration in the economic system, artificial intelligence on the ongoing development, and will fully launch the twenty-first century, human intelligence works.
According to Fayol model, established the basic functions of the organization structure, and to carry out the functions of type-based multi-variable combinations.
Samuelson that the industry growth rate greater than the economic or population growth, industrial structure will be changed.
Economic Analysis and optimization of system structure.
All these will promote a number of military enterprises structure innovation, such as Zhenhua (China UAV electronic equipment provider), Changhong (microelectronics technology providers), for the twenty-first century business intelligence put forward new demands.

Silicon atoms of the specimen are initially arranged in diamond cubic structure and vibrate around their perfect lattice structure positions.
The boundary atoms are fixed in their initial lattice position to maintain the structure of the system.
The atoms far away from the abrasive maintain the initial structure with four-coordinated.
Silicon atoms in diamond cubic structure are invisible.
Tersoff, Modeling solid-state chemistry: Interatomic potentials for multicomponent systems, Phys.

When x equaled to 1 and 0, the obtained materials were LFP/C with an olivine structure and LVP/C with a monoclinic structure, respectively [14].
Chung confirmed that replacing the Fe ion in olivine-structured LiFePO4 with other ions caused defects and impurities in Li3PO4 [16].
TEM images of four kinds of materials were observed to examine their micro-structures (Figure 2).
Li, et al., Electrochemical performance of LiFePO4@C composites with biomorphic porous carbon loading and nano-core-shell Structure, Ceram.
Structural and electrochemical characterization of LiFePO4 synthesized by an HEDP-based soft-chemistry route, Electrochem.