JCPDS Joint Committee on Powder

JCPDS Joint committee on powder diffraction standards LB Langmuir-Blodgett... 

The 100 x 325 mesh granules of Catapal SB Alumina used gave an x-ray pattern in excellent agreement with JCPDS (Joint Committee on Powder Diffraction Standards) pattern No. 21-1307 for A100H (boehmite) minor amounts of A1(0H), (nordstrandite with possible gibbsite polymorphs) are also, present- After steam-aging (760°C/5h) this alumina had a mercury surface area of 118 nr/9 and pore volume of 0.98 cc/g. 

DTA = differential thermal analysis FCC = face centered cubic FWHM = full width at half maximum ICDD = international center for diffraction data JCPDS = joint committee on powder diffraction standards EP = Lorentz and polarization PO = Preferred orientation. PT = parallel tempering PXRD = powder X-ray diffraction SA = simulated annealing SWE = short-wavelength-limit TGA = thermogravametric analysis XRPD = X-ray powder diffraction XRD = X-ray diffraction ... 

Mighell, A. D. and Stalick, J. K. (1983). Crystal data. Determinative tables. Vol. 6, 3rd edn. U. S. National Institute of Science and Technology, JCPDS—Joint Committee on Powder Diffraction Standards, ICDD—International Centre for Diffraction Data. [14]... 

Over 150,000 unique powder diffraction data sets have been collected from organic, organometallic, inorganic and mineral samples. These have been compiled into a database known as the JCPDS (Joint Committee on Powder Diffraction Standards). The experimental diffraction data can be cross-matched by on-line search or by comparing the three most intense reflections. This methodology is used as a quick method for the identification of impure materials, and it is also used widely in industry, e.g. for quality control in drug samples or the partition of minerals in clays. 

JCPDS Joint Committee on Powder Diffraction Stai... 

Joint Committee on Powder Diffraction Standards (JCPDS), Standard Powder Diffraction File, International Center for Diffraction Data, Swarthmore, PA. 

The XRD spectra for the nonvolatile material produced from the pyrolysis of 7, with the Joint Committee on Powder Diffraction Standards (JCPDS) reference patterns for CuInS2 (27-0159), confirmed it to be single-phase CuInS2 (see Fig. 6.9). Examination of the EDS spectra for the same samples shows predominant emissions from Cu, In, and S edges, with the approximate percentage atomic composition of 27, 23, and 50 for 7 and 28, 23, and 49 for 8, respectively, thus supporting the formation of CuInS2. 

Aust. J. Soil Res. 16 215-227 Joint Committee on Powder Diffraction Standards Mineral powder diffraction fde. Data book. Published by the JCPDS International Centre for Diffraction Data, Swarfhmore, Pennsylvania, U SA, pp. 942 Jolivet, J.P. Tronc, E. (1988) Interfadal electron transfer in colloidal spinel iron oxide. Conversion of Fe304 to y- Fe203 in aqueous medium. J. Colloid Interface Sci. 125 688—... 

Over 250,000 x-ray diffraction patterns have been compiled in a library by the Joint Committee on Powder Diffraction Standards (JCPDS). Figure 14.2 shows the Powder Diffraction File (PDF) for hexamethylbenzene. The crystallographic information includes a literature reference, cell parameters, space gronp, volume of unit cell, density, intensity pattern, and identification of the diffraction... 

JCPDS PDF cards No. 29-713 and 81-0464 for a-FeOOH, cards No.86-2267, 74-2081 and 10-0325 for NiFc204 International Centre for Diffraction Data, Joint Committee on Powder Diffraction Standards, Powder Diffraction File, 1601 Park Fane, Swarthmore, PA 19081, USA. 

The cobalt content was determined by atomic absorption at the service central d analyse du CNRS (Vemaison, France). Differential thermal and thermo gravimetric analyses (DTA/TG) were conducted in flowing air (75 mL min ) at a heating rate of 5°C min . Surface area analysis was performed using the BET method. N2 was selected as the adsorbent, and analysis was performed at liquid nitrogen temperature (-196 C). X-ray diffraction (XRD) measurements were made at room temperature (X =1.5418 A). The diffraction patterns have been indexed by comparison with the Joint Committee on Powder Diffraction Standards (JCPDS) files. Temperature Programmed Reduction (TPR) was performed using a 5% H2/Ar mixture (30 inL min - 5°C min ). 

X-ray diffraction (XRD) measurements were made at room temperature (X =1.5418 A). The diffraction patterns have been indexed by comparison with the Joint Committee on Powder Diffraction Standards (JCPDS) files. Nitrogen adsorption/desorption isotherms were obtained at -77K. BET and BJH analyses were used to determine the total specific surface area, pore volume and pore size distribution of the samples. 

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