X-Ray Powder Diffraction

FU - Freie Universität Berlin

last updated: July 19, 2023

About the Laboratory

X-Ray Powder Diffraction

FU - Freie Universität Berlin

@ Physical Geography

This Laboratory is part of:

Lab for Physical Geography laboratory complex
Networks: Geo.X

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Description

A Rigaku Miniflex 600 is used for solids (sediments and rocks; powdered samples) to determine (semi-quantitatively) the mineral composition of calcite, quartz etc.

Instruments

An x-ray powder diffractometer is primarily used for the identification of phases in powder form. An x-ray beam of known wavelength is focused on a powdered sample and x-ray diffraction peaks are measured using a germanium detector; the d-spacing of the observed diffraction peaks is calculated using Bragg's Law [n*lamda = 2dsin(theta)]. The Scintag Pad V automated powder diffractometer uses a Cu x-ray tube with variable filters, a four-sample changer, and a low-noise, high efficiency, liquid-nitrogen cooled germanium detector. The goniometer is automated and software packages are run from a PC running Windows NT 4. A number of Scintag software packages are available for routine powder diffraction data acquisition, background correction and peak identification. Unknowns can be matched to JCPDS cards in an on-line database. Other software is available for quantitative analysis of powder mixtures, unit cell refinement, Rietveld analysis, and GSAS structural analysis. Samples sho uld be prepared as powders with a grain size of 10 um (approximately), and typically about 100 milligrams of sample is required. Additional information available at "http://www.gps.caltech.edu/facilities/analytical/xrd.html" [Summary provided by Caltech]
An x-ray powder diffractometer is primarily used for the identification of phases in powder form. An x-ray beam of known wavelength is focused on a powdered sample and x-ray diffraction peaks are measured using a germanium detector; the d-spacing of the observed diffraction peaks is calculated using Bragg's Law [n*lamda = 2dsin(theta)]. (Source: excerpt from NASA; UUID: f54aafd2-925e-4653-b897-c6ae4e094c69) (Source: Global Change Master Directory (GCMD). 2023. GCMD Keywords, Version 16.3 [...] )
XRPD - X-Ray Powder Diffractometer
PXRD, Powder X-Ray Diffractometer, XRD

Analytical Methods

An x-ray powder diffractometer is primarily used for the identification of phases in powder form. An x-ray beam of known wavelength is focused on a powdered sample and x-ray diffraction peaks are measured using a germanium detector; the d-spacing of the observed diffraction peaks is calculated using Bragg's Law [n*lamda = 2dsin(theta)]. The Scintag Pad V automated powder diffractometer uses a Cu x-ray tube with variable filters, a four-sample changer, and a low-noise, high efficiency, liquid-nitrogen cooled germanium detector. The goniometer is automated and software packages are run from a PC running Windows NT 4. A number of Scintag software packages are available for routine powder diffraction data acquisition, background correction and peak identification. Unknowns can be matched to JCPDS cards in an on-line database. Other software is available for quantitative analysis of powder mixtures, unit cell refinement, Rietveld analysis, and GSAS structural analysis. Samples sho uld be prepared as powders with a grain size of 10 um (approximately), and typically about 100 milligrams of sample is required. Additional information available at "http://www.gps.caltech.edu/facilities/analytical/xrd.html" [Summary provided by Caltech] (Source: Global Change Master Directory (GCMD). 2023. GCMD Keywords, Version 16.3 [...] )
XRPD - X-Ray Powder Diffraction
PXRD, Powder X-Ray Diffraction, X-Ray Diffraction, X-Ray Diffraction Analysis, XRD

Laboratory Keywords

In addition to the instruments and analytical methods listed above, these keywords help to describe the work done in the laboratory. This may include the type of samples, standard materials, specific preparative or analytical methods and specific instrument characteristics.

Disciplines

Geoscience > Geochemistry > Geochemistry
Geochemistry
Interdisciplinary > Physical Geography > Physical Geography
Physical Geography

The Research Network for Geosciences in Berlin and Potsdam

X-Ray Powder Diffraction

FU - Freie Universität Berlin

About the Laboratory

X-Ray Powder Diffraction

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Description

Instruments

Analytical Methods

Laboratory Keywords

Disciplines

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