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The diversity of apatites is essentially related to their structure and to their mode of formation.
Apatite can be defined as a crystallographic structure [1].
During the slow process of evolution, these biological uses involved progressively elaborated characteristics and specificities of calcium phosphates chemistry.
The characteristics and the formation of hard tissues involve a sophisticated use of apatite crystals chemistry, especially concerning their surface and interface properties and their maturation ability.
The oxygen molecules have been shown to form inside the structure through the decomposition of unstable precursor: peroxide ions and hydrogen peroxide molecules trapped in the structure during synthesis.

Introduction Nano sized metal particles have great interest as they are effectively a bridge between bulk materials and atomic or molecular structures.
During past few decades silver nano particles have attracted interest in chemistry and medical industry due to their unique properties such as high thermal conductivity, high resistance of oxidation, anti bacterial activity [1].
The properties of silver are influenced by the various factors such as size of particles, shape, structure, etc.
The crystal structure of silver films was examined by X-ray diffractometer (XRD) with Cu Kα radiation (λ-1.5418Å) in the 2θ range from 20°-80°.
But their intensity will be low may be due to the formation of crystalline structure during annealing.

The degradation of the structure of the protein induced by UV light is significantly reduced in the treated parchments.
Non-destructive and micro-invasive testing techniques for characterizing materials, structures and restoration problems in mural paintings.
Chemistry-A European Journal, 16(31), 9374-9382
Conservation of historic timber roof structures of Italian architectural heritage: diagnosis, assessment, and intervention.
Pure and Applied Chemistry, 89(1), 3-17

Besides, the zinc-blende structure on ceramics targets was confirmed by XRD.
The structure of bulks was characterized by XRD using BRUKER D8 ADVANCE.
So the structure of zinc-blende can be affirmed in ZnS and ZnSe at this moment[24-26].
In conclusion, the XRD pattern of ZnSe has a better structure property than ZnS due to its absorptivity and doping efficiency.
Materials Chemistry and Physics Vol.133, p.823-828 [19] X.C.

Energy dissipation concrete The way that modern structure improves its seismic capacity is to make the structure exerted by control devices, such as the passive energy dissipation machine or passive energy dissipation control system developed by the shape memory alloy aforementioned.
According to this way, the control devices and the structure bear the seismic action together, namely, accumulate and dissipate the earthquake energy together, to coordinate and alleviate the seismic action of the structure.
The study on the structure and the material of concrete still remains to be a perpetual subject.
A brief introduction to the application of intelligentized concrete materials in concrete structures, [J].
The study on concrete with high damping and its application in the energy dissipation structure.

Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)
Usually, HEAs form simple crystal structures, and exhibit super mechanical performance [2].
It has been identified that a single-phase-solid solution with a BCC structure forms for the AlCoCrFeNi HEA [3,10].
A single-phase solid solution with a BCC structure can be obtained for AlCoCrFeNi HEA.

Optimized Structure The optimized molecular structures of the flavonoids or Flavs (Flav1, Flav2, Flav3, Flav4) [16]: Flav1: 3-O-acetylaromadendrin.
The stabilization energy and the dipolar moment µ of the optimized structures are given in Table 5.
Optimized structures of different Flavs.
Liu, Quantum chemistry study on the relationship between molecular structure and corrosion inhibition efficiency of amides, J.
Zucchi, Corrosion inhibitors - Correlation between electronic structure and efficiency, Corrosion. 57 (2001) 3-8.

In addition, detailed knowledge of their spatial distribution, atomic structure, chemistry and origin is of central importance for improving processing schemes and materials properties as well as for a fundamental understanding of their physical properties.
We will show that this approach opens the route for investigating the atomic structure and chemistry of such defects at high resolution even for low defect densities typical for numerous problems.
Transmission electron microscopy is used to study structure and chemical composition of the resulting precipitates which have the NiSi2 structure and morphologies known from the binary case.
The latter is expected from the similar lattice parameters of NiSi2 and Si and the crystal structure of NiSi2 which is of CaF2type.
Wilshaw, eds., Structure and Properties of Dislocations in Semiconductors, Inst.

The structure is infinitely extended in both x and z directions.
Geometry optimization of crystal structure gives a Mg_{Mg}= 3.15 Å and c_{Mg}Mg= 1.62 a_{Mg}a Mg with a bonding energy of 1.59 eV/at. [17]Experimentally MgH2, in the range of temperatures considered, transforms in the β-MgH2 atomic structure, TiO2-rutile type, before the onset of hydrogen desorption [15].The crystal structure is relaxed over a range of possible cell volumes, varying by hand the cell parameters and minimizing the total energy.
The structure is infinitely extended in both x and z directions.
Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)

A p-n junction device structure was created using these dopants.
Laser Doping Experiment P-type 4H-SiC wafers containing 10 19 cm-3 aluminum (Al) were laser-doped with chromium (Cr), selenium (Se) and nitrogen (N) to fabricate an LED structures.
Laser-doped 4H-SiC LED structure and SIMS analysis for Cr, Al, N concentration profiles along the depth of the substrate including standards (Std) for Cr, N and Al.
Improvement in the contact properties and device structure optimization will boost output power.
Woo Kyoung Kim of the Chemistry Department, University of Florida, for the DLTS measurement using a DLTS system developed by Sula Technologies.