Vibrational spectra of the rare-occurring complex hydrogen arsenate minerals pharmacolite, picropharmacolite, and vladimirite: Dominance of Raman over IR spectroscopy to discriminate arsenate and hydrogen arsenate units

Petre Makreski, Jovica Todorov, Vasil Makrievski, Ljupčo Pejov, Gligor Jovanovski
  • Journal of Raman Spectroscopy, January 2018, Wiley
  • DOI: 10.1002/jrs.5324

Dominance of Raman over IR spectroscopy

What is it about?

The appearance of three sets of two bands (six bands in total) in the region of od v1 to v4 modes completely reflects the existence of three symmetrically nonequivalent AsO4 groups in the structures of vladimirite and picropharmacopite and only one set of v1 to v4 bands from the structurally equivalent AsO3OH units in the pharmacolite structure.

Why is it important?

In this case, it was found that, compared to infrared spectroscopy, Raman spectroscopy is more promising vibrational spectroscopy technique that more consistently fingerprints and elucidates the structure of the studied minerals, enabling to discriminate arsenate and hydrogen arsenate units.


Gligor Jovanovski (Author)
Macedonian Academy of Sciences and Arts

It was a great pleasure to include in this study two young researches (students) as well as other two co-authors with whom I have had long standing collaborations. This article is a part of the comprehensive investigations of the minerals from the Republic of Macedonia.

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The following have contributed to this page: Gligor Jovanovski