  The multi analytical study of terrestrial analogues is a useful strategy to
deepen the knowledge about the geological and environmental evolution of Mars
and other extraterrestrial bodies. In spite of the increasing importance that
LIBS, NIR and Raman techniques are acquiring in the field of space exploration,
there is a lack web-based platform providing free access to a wide
multi-spectral database of terrestrial analogue materials. The Planetary
Terrestrial Analogue Library (PTAL) project aims at responding to this critical
need by developing and providing free web accessibility to LIBS, NIR and Raman
data from more than 94 terrestrial analogues selected according to their
congruence with Martian geological contexts. In this framework, the present
manuscript provides the scientific community with a complete overview of the
over 4500 Raman spectra collected to feed the PTAL database. Raman data,
obtained through the complementary use of laboratory and spacecraft-simulator
systems, confirmed the effectiveness of this spectroscopic technique for the
detection of major and minor mineralogical phases of the samples, the latter
being of critical importance for the recognition of geological processes that
could have occurred on Mars and other planets. In light of the forthcoming
missions to Mars, the results obtained through the RLS ExoMars Simulator offer
a valuable insight on the scientific outcome that could derive from the RLS
spectrometer that will soon land on Mars as part of the ExoMars rover payload.
