Raman anisotropy in serpentine minerals, with a <i>caveat</i> on identification

The serpentine minerals lizardite, polyhedral serpentine, chrysotile, antigorite and 15-sector 30-sector polygonal have been studied by micro-Raman spectroscopy, using selected samples, that had previously characterized. appropriate crystal orientations were determined optical microscopy of petrographic sections. Oriented spectra, obtained Nd-YAG green laser radiation (532 nm), deconvolved, extracting wavenumber intensity values for the peaks, possibly overlapping forming complex bands. Relevant Raman anisotropy is common relevant in serpentine. Depending upon orientation impinging laser, significant shifts occur (up to 10 cm?1, mostly lizardite). Furthermore, also, important variations 1 order magnitude) chrysotile as well. On one hand, characteristic peaks identified discussed. other caution suggested far characterization polyphasic, variably oriented concerned.