Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars.

@article{Edwards2005RamanSA,
  title={Raman spectroscopic analysis of cyanobacterial gypsum halotrophs and relevance for sulfate deposits on Mars.},
  author={Howell G. M. Edwards and Susana E. Jorge Villar and John Parnell and Charles S. Cockell and Pascal Lee},
  journal={The Analyst},
  year={2005},
  volume={130 6},
  pages={917-23}
}
The Raman spectra of cyanobacterial species, Gloecapsa and Nostoc, in clear gypsum crystals from the Haughton Crater, Devon Island, Canadian High Arctic, site of a meteorite impact during the Miocene some 23 Mya, have been recorded using several visible and near-infrared excitation wavelengths. The best spectra were obtained using a green wavelength at 514.5 nm and a confocal microscope with an image footprint of about 2 micro in diameter and 2 micro theoretical depth. Raman biosignatures for… CONTINUE READING

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