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Increasing amount of sublimable agent exhibited lower density of the floating tablet because of higher porous structure.
The sublimable agent was evaporated at high temperature resulting in the porous structure.
Above the sublimation temperature, borneol in the matrix tablet can be sublimated and caused porous structure in the tablet.
Powder X-ray diffractometry (PXRD) is one characterization tools used in solid state chemistry and materials science.
Under these conditions, borneol was sublimated and caused porous structure in the floating matrix tablet.

The XRD results of the hybrids indicate that the peak of the organophilic clay disappeared when incorporated into the polyamide, showing that all systems were exfoliated and/or partially exfoliated structure.
At approximately 7.0°, there was a band indicating a basal interplanar distance d001 of 12.63 Å, which is characteristic of montmorillonites containing Na+ ions in the structure with a small hydration [6].
For hybrids (Figure b), the absence of the characteristic peak of the clay was verified when it is incorporated in the polymer matrix and, thus an exfoliated structure of the nanocomposite appeared.
By XRD, it was seen that the systems presented possibly exfoliated structures.
Domka: Journal of Physical and Chemistry of Solids Vol. 65 (2004), p. 441

The XRD patterns revealed that as-prepared ATO films were in the crystallization of a tetragonal rutile structure of SnO2 with highly (110) preferred orientation.
X-Ray diffraction (XRD) measurements of the tin oxide films were performed using a Rigaku D/Max-3B X-ray diffractometer to investigate the structure of the deposited films.
The increase of annealing temperature resulted in the crystallization of the films, as represented by basically polycrystalline, a tetragonal rutile structure of SnO2 with highly (110) preferred orientation.
The increase of annealing temperature resulted in the crystallization of the films, as represented by basically polycrystalline, a tetragonal rutile structure of SnO2 with highly (110) preferred orientation.
Zhang: Material Chemistry and Physics(in press)

Synthesis and optical property of MgMoO4 crystals Camila Soares Xavier1, a *, Ana Paula de Moura1,b, Elson Longo1,c, José Arana Varela1,d and Maria Aparecida Zaghete1,e 1 LIEC, Department of Physical Chemistry-IQ, UNESP, P.O.
XRD analyses revealed that the MgMoO4 powders crystallize in a monoclinic structure and are free secondary phases.
MgMoO4 is a member of this family, with wolframite structure it belongs to monoclinic system with C2/m space group and cell parameters a=10.273, b=9.288, c=7.025, b=106.96°, z=8.
All diffraction peaks can be indexed as a wolframite with pure monoclinic structure with and space group C2/m.
XRD pattern revealed that obtained powders are free of secondary phases and exhibit a wolframite-type phase with monoclinic structure after the heat treatment at 1100 ºC.

The results revealed porous powders, nanometric, and single-phase with orthorhombic perovskite structure.
The ideal structure has cubic symmetry, but distortions to orthorhombic, tetragonal and rhombohedral may occur.
The images show well structure porous, which was generated with the evolution of gases during the process of synthesis.
The powders were single phase with orthorhombic perovskite structure.
Morii: Journal of Solid State Chemistry Vol. 162 (2001), p. 84

As deposited coatings are amorphous and crystallise in the perovskite structure after annealing at 873 K for 2 hours under air.
Introduction In recent years, there has been considerable interest paid to perovskite structure oxides (ABO3, A = La, Pr, Nd, ... and B = Co, Mn, ...) to replace noble metals (Pt, Pd, ...) for gas sensor applications [1-2].
As deposited coatings are amorphous and a post heat-treatment under air is necessary to crystallise them in the perovskite structure.
The coating crystallises in cubic structure of LaCoO3 with Pm-3m space group.
Veiga, Materials Chemistry and Physics 120 2-3, (2010), 387-392

The effect of the chemical vapor deposition (CVD) process parameters on the structure of graded SiC-SiO2 coating was studied through thermodynamic computation.
Chemical vapor deposition (CVD) is an excellent coating method for it can easily produce a dense coating with the controllable composition and structure in batch, so much effort has been attached upon CVD process of SiC coating [8-10] and SiO2 coating [11] up to now, which establishes a good foundation for the synthesis of SiC-SiO2 multilayered coating by CVD.
However, large stress at the interface between SiC layer and SiO2 layer in a multilayered SiC-SiO2 coating exists due to the mismatch of their crystal structures and the difference of their thermal expansion coefficients.
Graded coating structure can obviously decrease the stress at the interface, which makes the adhesion between coating and substrate or between different layers in multilayered coating greatly improved [12].
In this paper, the equilibrium concentration of various phases in the coating fabricated by CVD with SiCl4, H2O and CH4 as the reactant gas is obtained with HSC chemistry 4.1, which is the software for the thermodynamic computation of equilibrium of various reaction; and then the influence of the species of carrier gas, deposition temperature, and concentration of reactants on the structure of SiC-SiO2 coating coating is studied.

Solid - liquid Equilibria for the Quaternary Na2B4O7 - Na2SO4 - K2B4O7 - K2SO4 - H2O System at 323K ShiHua Sang1, 2, a，XiaoXiao Zeng1, b，HuiYi Ning1, c, Zhenlei Zhang1, d 1 College of Materials and Chemistry & Chemical Engineering,, Chengdu University of Technology, ChengDu 610059, P.
China 2Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, ChengDu 610059, P.
The borate ions exist with B4O5(OH)42- ion in saturatated solution, and the chemical structure type of borates are Na2[B4O5（OH）4]·8H2O and K2[B4O5（OH）4]·2H2O.

Adsorption of Pb(Ⅱ) on activated carbon treated by nitric acid Xiaoyan Tan1, Fang Zhao2, Ruizhi Wen3, Yu Dai4 (The Institute of Applied Chemistry, Central South University of Forestry & Technology, Changsha, Hunan 410004, PR China) 1tanxy0011@sina.com, 2huhu614@163.com, 3wenruizhi@163.com, 4daiyuldy@126.com Keywords: Activated carbon; Adsorption; Wasterwater treatment; Surface property.
Activated carbons have high surface area, micro porous structure and chemical nature of the surface, which made them potential adsorbents for the removal of heavy metals from industrial wastewater.
It could ascribe to the variation of surface chemistry of the samples.

Experimental program Concrete was designed as the grade of compressive strength of C30 according to Chinese Standard Code for Design of Concrete Structures GB50010-2000.
Materials Chemistry and Physics, 2007,106 ( 2-3): 240-246 [4]NADEAU J C.
Materials Chemistry and Physics ，2005 (91)：538–544