JCPDS-ICDD Research Associateship (cooperative program with NBS/NIST)

Abstract

The Research Associateship program of the Joint Committee on Powder Diffraction-International Centre for Diffraction Data (JCPDS-ICDD, now known as the ICDD) at NBS/NIST was a long standing (over 35 years) successful industry-government cooperation. The main mission of the Associateship was to publish high quality x-ray reference patterns to be included in the Powder Diffraction File (PDF). The PDF is a continuing compilation of patterns gathered from many sources, compiled and published by the ICDD. As a result of this collaboration, more than 1500 high quality powder diffraction patterns, which have had a significant impact on the scientific community, were reported. In addition, various research collaborations with NBS/NIST also led to the development of several standard reference materials (SRMs) for instrument calibration and quantitative analyses, and computer software for data collection, calibration, reduction, for the editorial process of powder pattern publication, analysis of powder data, and for quantitative analyses. This article summarizes information concerning the JCPDS-ICDD organization, the Powder Diffraction File (PDF), history and accomplishments of the JCPDS-ICDD Research Associateship.

Surface characterization of electrodeposited silver on activated carbon for bactericidal purposes

“…In the case of samples Q1-i1, Q1-i2, and Q4-i4, the intensity peak ratios Ag(200)/Ag(111) are 0.5, 0.40, and 0.42, respectively. These values are very close to the corresponding Ag STD [30] ratio of 0.4. In the case of the F1-i1 sample, it is observed that the intensity peak ratio Ag(200)/Ag(111) is almost two times greater than the Ag STD; it is also observed that this sample shows no peak on the plane Ag(220), compared to the rest of the samples.…”

Photovoltaic materials: Cu2ZnSnS4 (CZTS) nanocrystals synthesized via industrially scalable, green, one‐step mechanochemical process

“…In order to obtain proper geometry set‐up and to eliminate instrumental broadening, the instrumental resolution function was determined by refinement of LaB 6 standard specimen. The JCPDS PDF database was utilized for phase identification …”

Preparation of layered double hydroxide/chlorophyll a hybrid nano-antennae: a key step

“…The XRD patterns of the Mg/Al(x) and Ni/Al(x) samples revealed that the latter were all crystalline (S4 †) and identified as LDHs (JCPDS 41-1428). 36 The lattice a parameter calculated from the position of the (110) peaks (Fig. S4 †) at about 60°(2θ) (a = 2 × d 110 ) decreased in both series of LDH when the M 2+ /Al 3+ molar ratio decreased (Table S5 †).…”