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These characteristics strongly depend on grain boundary phenomena, such as the size, distribution and chemistry of the grain boundary precipitates.
The crystallographic structure was however found to remain constant.
Crystal structure will be described in the next section.
A hexagonal-close-packed structure with a = 10.4 Å and c = 4.05 Å was obtained.
Their chemistry corresponds to that of the C-phase, with small amounts of Cu

This paper presents the effect of an Ammonium sulphate (NH4)2 SO4) leak mixed in the boiler feed water system on the microstructure, chemistry, metallurgy and mechanical properties of the water tube boiler.
Okpala et al. [7] investigated causes failure of an in-service steam boiler finding that the failure of the tubes was due to corrosion by water chemistry within the tube.
Therefore, in this research studied the effect of ammonium sulfate (NH4)2 SO4 leaked into a boiler feed water system to the microstructure, chemistry, metallurgy and mechanical properties of a steel water tube boiler was investigated. 2.
Internal temperature of super-heated tube = 450 °C Internal temperature of water tube = 250 °C Outside diameter and thickness for super-heated tube = 38.4 mm (+/-1%) and 5 mm (+/-12.5 %) Outside diameter and thickness for water tube = 51.2 mm (+/- 1 %) and 5 mm (+/- 12.5 %) Fig.1 Location of tube specimens (a) no.A and (b) no.B The effects of ammonium sulfate caused significant changes to the alloys such as their appearance, elemental distributions, metallographic structures, and mechanical properties.
A decrease of the yielding strength value of both the used tube (no.A and no.B) is due to the segregation of phase of the pearlite structure in a matrix.

The researches of submicron ZnO rods-like structure are rarely compared to those of nano ZnO structure.
It can be seen that the (002) peak is very strong, the diffraction angle is , and the other peaks are very low, indicating a highly c-axis-oriented structure.
Fig.2(b) shows the submicron ZnO rods-like arrays are six prismatic structure, coincides to the structure of wurtzite.
An, Chinese Journal of Applied Chemistry. 2(2011) [24] Y.
Qian, Materials Chemistry and Physics. 99(2006)

The materials prepared by self-assembly collagen and collagen -HAP showed layer structures.
Fig. 1(b) shows that the structure of calcium-containing collagen became more fined.
Right amount of Ca2+ could not baffle the formation of the layer structure.
Fig. 1(c) shows the structure of Collagen-HAP.
This resulted in the stereo-structure changes.

The BET of BiOBr was 12.03 m2/g and was layered structure.
Results and Discussion Structure properities of BiOBr X-ray diffraction(XRD) was used to investigate the phase structures of BiOBr.
Close observation of microstructure on the BiOBr by the high-resolution TEM image (Fig. 2c) demonstrates further details of the BiOBr lamellar structure[4].
China Journal Analyst Chemistry, 2011, 39(4): 540–543
Chemistry European Journal, 2013 19(1) 3224-3229.

Hans Bohni began his academic career at the Swiss Federal Institute of Technology (ETH) in Ziirich, where he graduated in chemistry in 1963 .
He is president of the Swiss Society for Corrosion Protection and president of a working group "Maintenance of Structures" of the Swiss Engineers and Architects (SIA).
Bohni, to all the sponsors that made its publication possible and last, but not least, to my colleagues at the Institute of Materials Chemistry and Corrosion, especially Marietta Nick, for their assistance in preparing the volume.

Fig.1 Pure ferrite surface structure, resolution 50 000x Figure 2 is assuming the SEM analysis of pure ferrite 1, ferrite coated with TIPP 2, and mesoporous structure of Pk 20 with TIPP mixture with same resolution.
Using Pk20 leaded to formation of thick mesoporous structure over the particles.
Fig. 3 is showing the structure of C and Au coated ferrites particles and the result of their coating.
Joy, Materials Chemistry and Physics, Vol 100, (2006) p.98–101
McEvoy, Journal of Physical Chemistry B, Vol. 104, (2000) no. 18, p. 4387–4396, [12] Z.

Structure Studies on Order Assemblage of ManganeseII Complexes Yu Liu1, Shanshan Zhang1,2, Jian Gao1,*, Tianzhu Yang3, Hongxiao Tian3 1Department of Chemistry, Shandong Polytechnic University, Jinan, P.
Email: gaojian@spu.edu.cn Keywords: manganeseII complex, photosystem II, electrostatic interaction, supramolecular structure Abstract.
The ethylvanillinate ligand chelates to the MnII atom through its ethyl and hydroxyl O atoms, with greatly differing Mn-O bond distances (2.3988(15)Å and 2.0675(13)Å).Adjacent complex link to each other via hydrogen bonds forming the three-dimensional supramolecular structure.
In order to mimic the manganese cluster, a series of manganese complexes have been synthesized,among which some crystal structures revealed the existence of significant electrostatic interaction between the Mn atom and the ligand(Nie et al., 2001;Hu et al., 2002; Liu & Xu, 2003).The structure of the manganeseII complex, Diaqua-bis(ethylvanillinato-O,O')-manganeseII,provides a new example of this electrostatic interaction in an MnII complex.
The structure of (I), showing 30% probability displacement ellipsoids.

Carbon nanotubes is a current subject of intense research for their special structures, good conductivity, well mechanic and semicondcutor property.
Iijima [1] Since the CNT was first discovered, it its unique structure, good electrical conductivity, mechanical and semiconductor properties of Materials Science and become a hot field of study [2-3].
Single-walled carbon nanotubes are single layer made of carbon atoms around the joint, the structure has better symmetry and unity.
Carbon evolved from the graphite, which is still a large number of unpaired electrons swimming along the wall, its unique structure determines its special properties.
Modification of organic chemistry research has become a new hot spot at home, there are two strategies: (1): added directly to the functional groups on carbon nanotubes, such as: In 1998, Mickelson ET, etc. with a single mass of fluoride on the single-walled carbon nanotube synthesis of direct fluorination the fluorinated single-walled carbon nanotube.

Synthesis, Structural Characterization and Luminescence Property of Ring-like Zinc(II) Complex of N-paratoluensulfonyl-glycine Acid and 1,10-Phenanthroline Xi-Shi Tai 1, a 1 College of Chemistry and Chemical Engineering, Weifang University, Weifang 261061, P.R.
The crystal structure of Zn (II) was determined by X-ray single crystal diffraction.
Intermolecular weak interactions in complex link molecules into a one-dimensional infinite chain supramolecular structure.
Thus it is of great interest in studying the coordination chemistry of N-sulfonyl amino acids [4]. 1,10-phenanthroline ligand is a simple but attractive building block.
Crystal structure of complex The molecular structure of complex is shown in Fig. 1, the one dimension chained structure of complex is shown in Fig. 2, and the selected geometric parameters are given in Table 2.