Raman Study of Natural Berlinite from the Cioclovina Cave Phosphate Deposit

Simona Cîntă Pînzaru, Bogdan P. Onac

Research output: Contribution to journalArticlepeer-review

Abstract

<p> <p id="x-x-"> Natural berlinite from a heated sedimentary sequence in Cioclovina Cave (Romania) was studied using Raman spectroscopy complemented with infrared techniques. Vibrational data acquired at room temperature were compared with those reported for synthetic berlinite in ambient conditions. The symmetry of the (PO <sub> 4 </sub> ) <sup> 3&minus; </sup> units is confirmed by the observation of characteristic bands attributed to the <em> &nu; </em> <sub> 1 </sub> (PO <sub> 4 </sub> ) <sup> 3&minus; </sup> stretching mode, both the <em> &nu; </em> <sub> 4 </sub> and <em> &nu; </em> <sub> 2 </sub> bending regions at 500&ndash;595 cm <sup> &minus;1 </sup> , and 350&ndash;500 cm <sup> &minus;1 </sup> , respectively. The berlinite Raman fingerprint was unambiguously identified at 1111 and 1104 cm <sup> &minus;1 </sup> , confirming the identity of the species and elucidating some controversial reports in the mineralogy field. <p id="x-x-"> The vibrational data of natural berlinite relates to its crystallography, and along with the spectra&ndash;structure correlation, confirmed an almost ideal natural berlinite crystal. </p> </p></p>
Original languageAmerican English
JournalVibrational Spectroscopy
Volume49
DOIs
StatePublished - Mar 1 2009

Keywords

  • Naturalberlinite
  • Raman
  • IR
  • Cioclovina Cave Romania

Disciplines

  • Earth Sciences
  • Geology
  • Physical Sciences and Mathematics

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