“Woah! It's like Spotify but for academic articles.”

Instant Access to Thousands of Journals for just $40/month

Spectroscopy of selected copper group minerals: Chalcophyllite and chenevixite-implications for hydrogen bonding

Spectroscopy of selected copper group minerals: Chalcophyllite and chenevixite-implications for hydrogen bonding NIR and IR spectroscopy has been applied for detection of chemical species and the nature of hydrogen bonding in arsenate complexes. The structure and spectral properties of copper(II) arsenate minerals: chalcophyllite and chenevixite are compared with copper(II) sulphate minerals: devilline, chalcoalumite and caledonite. Split NIR bands in the electronic spectrum of two ranges 11,700–8500 cm −1 and 8500–7200 m −1 confirm distortion of octahedral symmetry for Cu(II) in the arsenate complexes. The observed bands with maxima at 9860 and 7750 cm −1 are assigned to Cu(II) transitions 2 B 1g → 2 B 2g and 2 B 1g → 2 A 1g . Overlapping bands in the NIR region 4500–4000 cm −1 is the effect of multi-anions OH − , (AsO 4 ) 3− and (SO 4 ) 2− . The observation of broad and diffuse bands in the range 3700–2900 cm −1 confirms strong hydrogen bonding in chalcophyllite relative to chenevixite. The position of the water bending vibrations indicates the water is strongly hydrogen bonded in the mineral structure. The strong absorption feature centred at 1644 cm −1 in chalcophyllite indicates water is strongly hydrogen bonded in the mineral structure. The H 2 O-bending vibrations shift to low wavenumbers in chenevixite and an additional band observed at 1390 cm −1 is related to carbonate impurity. The characterisation of IR spectra by ν 3 antisymmetric stretching vibrations of (SO 4 ) 2− and (AsO 4 ) 3 ions near 1100 and 800 cm −1 respectively is the result of isomorphic substitution for arsenate by sulphate in both the minerals of chalcophyllite and chenevixite. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Elsevier
Loading next page...
 
/lp/elsevier/spectroscopy-of-selected-copper-group-minerals-chalcophyllite-and-XfyJEqoUEs

You're reading a free preview. Subscribe to read the entire article.

And millions more from thousands of peer-reviewed journals, for just $40/month

Get 2 Weeks Free

To be the best researcher, you need access to the best research

  • With DeepDyve, you can stop worrying about how much articles cost, or if it's too much hassle to order — it's all at your fingertips. Your research is important and deserves the top content.
  • Read from thousands of the leading scholarly journals from Springer, Elsevier, Nature, IEEE, Wiley-Blackwell and more.
  • All the latest content is available, no embargo periods.

Stop missing out on the latest updates in your field

  • We’ll send you automatic email updates on the keywords and journals you tell us are most important to you.
  • There is a lot of content out there, so we help you sift through it and stay organized.