Phase Identification of Geological Material

X-ray powder diffraction is a fast method for determining the phase content of polycrystalline material. Every material exhibits a typical ‘X-ray fingerprint’, which is stored in databases such as the ICDD PDF2 or PDF4. This fingerprint is utilized in the DIFFRAC.EVA software for phase identification. Furthermore, automatic scaling of the patterns from the database relative to the measured intensities gives the semi-quantitative phase composition.

Pulverized geological material was measured with the D2 PHASER. Experimental details are summarized in Table 1. Figure 1 shows a zoomed region (intensities are cut at about 10% of the maximum intensity) of the diffraction data together with the result of the phase identification. The data, collected within 45 minutes, show a very good counting statistics. Minor phases of less than 1 wght-% are clearly identified.

Table 1. Experimental settings.

D2 PHASER, LYNXEYE detector
Cu radiation (30 kV, 10 mA), Ni filter
Continuous scan from 3.0 to 55.0° 2Theta
Step width 0.02°
counting time 1 sec per step
Total scan time about 45 min.
2.5° Soller collimators, 0.6 mm divergence slit,
anti-scatter screen
LYNXEYE detector opening 5° 2Theta

Phase identification of geological material with DIFFRAC.EVA. The major phase is gypsum. Semiquantitative phase analysis gives the content of the minor phases: quartz (7.2%), muscovite (0.9 %), dolomite (2.1 %), and chlorite (1.0 %).

Figure 1. Phase identification of geological material with DIFFRAC.EVA. The major phase is gypsum. Semiquantitative phase analysis gives the content of the minor phases: quartz (7.2%), muscovite (0.9 %), dolomite (2.1 %), and chlorite (1.0 %).

Conclusion

Using the D2 PHASER the value of the investigated geological sample for use in building materials could immediately be shown.

This information has been sourced, reviewed and adapted from materials provided by Bruker X-Ray Analysis.

For more information on this source, please visit Bruker X-Ray Analysis.

Citations

Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Bruker AXS Inc.. (2019, August 30). Phase Identification of Geological Material. AZoM. Retrieved on October 19, 2019 from https://www.azom.com/article.aspx?ArticleID=5141.

  • MLA

    Bruker AXS Inc.. "Phase Identification of Geological Material". AZoM. 19 October 2019. <https://www.azom.com/article.aspx?ArticleID=5141>.

  • Chicago

    Bruker AXS Inc.. "Phase Identification of Geological Material". AZoM. https://www.azom.com/article.aspx?ArticleID=5141. (accessed October 19, 2019).

  • Harvard

    Bruker AXS Inc.. 2019. Phase Identification of Geological Material. AZoM, viewed 19 October 2019, https://www.azom.com/article.aspx?ArticleID=5141.

Comments

  1. Chayan Patra Chayan Patra India says:

    How the phase is identified by the PXRD in case of geological sample? Any standard data is available for geological sample for comparing? ICDD PDF2 or PDF4-how it works?

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoM.com.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Submit