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(Fig.1) The XRD peak values conform to those reported in the standard values (JCPDS card no.6-0399).
From the experiments, it appears that a number of factors affect the variation in the reaction product formation, predominantly heat evolved, maximum reaction temperature, local O2 and CO2 concentration, redox reactions and heats of formation and decomposition of reactants and products.

The lattice constant for Eu doped YAG glass ceramics is calculated to be 1.200nm, which is extremely close to 1.201nm of the pure YAG crystal phase (JCPDS Card No. 791892).
Compared with the diffraction spectrum of the powder sample, the peak number of the bulk sample decreased obviously.

Tetrabutyl titanate was dissolved in absolute ethanol with the concentration of 0.4M ether, and then tetrabutyl titanate solution was dropped slowly into the base solution with the same molar number by a constant-pressure dropping filler and permanently stirred quickly at 60˚C for 2h under the normal pressure.
It can be seen that only peaks assigned to BST were observed (JCPDS 79-2263), which revealed that the products were single cubic BST perovskite phase without any other crystalline by-products such as BaCO3, SrCO3 and TiO2.
All the patterns are corresponding to JCPDS cards (JCPDS 79-2263) with the same composition of the perovskite phase without phase transitions.

Because multi-valences of vanadium make it capable of forming several numbers of oxides and VO2 can appear as polymorph structures.
These peaks were at 20.4°, 21.8° and 41.3°, assigned to (001), (101) and (002) planes of the orthorhombic V2O5 (JCPDS File No. 41-1426).
All of three XRD peaks correspond to the trigonal structure of V2O3 with a space group R-3c (167) (JCPSD card no.84-0319).
These peaks confirm the formation of crystalline V2O5 films (JCPDS: 41-1426) with several planes.
Two strong peaks appeared at 14.5° and 29.2° and two weak peaks at 44.3° and 53.9°, which are assigned to the monoclinic B-VO2 phase (JCPDS: 65-7960).

A large number of studies are carried in order to produce CdS thin films with good structural and optical properties suitable for photovoltaic applications.
The results of our study are in good agreement with the standard JCPDS card No 01-0647 value.

The (100), (200) and (300) reflections of the apatite fibres were more intense than those of a typical HAp listed in JCPDS card #9-432, although the XRD pattern of crushed fibres was more similar to that of typical HAp.
There were a significant number of these contours in this single crystal apatite fibre.

The data obtained are in agreement with the respective JCPDS (Joint Committee on Powder Diffraction Standards) card Nº 21-961.
Indicative numbers of bands position in the Fig. 2 Bands absorption [cm-1] Active modes 1 3227 [ν(H2O) 2 2000-1300 [ν(CO)] 3 951 [νsm(Mo-O)] 4 872 [νas(Mo-O) ] 5,6 814, 706 [ν(Mo-O-Mg) ] 7 448 [d( Mo-O-Mo)] Field-emission gun scanning electron microscopy analysis.

The diffraction peaks indicate the nanocrystalline nature (JCPDS card no.36-1451).
Acknowledgements This work was financially supported by the grant from Changzhou University under the contraction number ZMF1002132.

There are number of investigations on photoluminescence (PL) property of ZnO nanocrystals [5, 6].
The crystal system was found to be hexagonal using standard JCPDS card. 79-0205.

The diffraction peaks at 2q were at 38.03, 43.95 and 63.99, and these matched well with the (111), (200) and (220) plane, respectively, of a face-centered cubic structure for metallic Ag (JCPDS card number 04-0783).