X-ray diffraction | An-Najah Staff

Chemical and mineralogical analyses of Gallo-Roman wall painting from Dietikon, Switzerland

Wed, 2015-07-15 10:07 — Hamdallah Bearat

Journal Title, Volume, Page:

Archaeometry Volume 38, Issue 1, pages 81–95, February 1996

Year of Publication:

1996

Link:

http://onlinelibrary.wiley.com/doi/10.1111/j.1475-4754.1996.tb00762.x/abstract

Authors:

Hamdallah A. Béarat

Institute of Mineralogy and Petrography, Fribourg University, Pérolles, CH-1700 Fribourg, Switzerland

Current Affiliation:

Department of Materials Science, Faculty of Engineering and Information Technology, An-Najah National University, Nablus. Palestine

[email protected]

Preferred Abstract (Original):

Around 90 samples of Roman wall painting dating from the first to the third century AD were analysed using different analytical techniques: X-ray diffraction, X-ray fluorescence, infrared spectrometry, scanning electron microscopy, energy dispersive spectrometry, optical microscopy and physico-chemical tests. The identified pigments are: ash, calcite, carbon black, celadonite, cinnabar, Egyptian Blue, glauconite, goethite, hematite and red lead. Pigment mixtures were used to get other colours such as brown, pink or purple. Three types of plaster were used: a first, and most dominant, with river sand, a second with crushed tile for damp places and a third, to which cinnabar was exclusively applied, was prepared with crushed calcite crystals.

Intermediate Range Order in Se1−xSx Bulk Glasses

Wed, 2014-02-19 13:56 — Ghassan Saffarini

Journal Title, Volume, Page:

Materials Letters Volume 35, Issues 5–6, Pages 314–316

Year of Publication:

1998

Link:

http://www.sciencedirect.com/science/article/pii/S0167577X97002723

Authors:

G Saffarini

Physics Department, An-Najah National University, Nablus, Palestine

Current Affiliation:

Department of Physics, Faculty of Science, An-Najah National University, Palestine

[email protected]

Preferred Abstract (Original):

Se_1−xS_x bulk glasses, within the composition range 0.1≤x≤0.5, were prepared from high purity constituent elements. The X-ray structure factors obtained from these glasses show the presence of the first sharp diffraction peak (FSDP), which is the most universal signature of intermediate range order (IRO). The position and the full-width at half-maximum (FWHM) of the observed FSDP which relate, respectively, to the intercluster distance and the cluster size, remain essentially the same. The intensity of this peak increases with the amount of S content in the glasses. We interpret these results by proposing that the IRO in this system is related to the formation of ring-like clusters.