  COSIMA (COmetary Secondary Ion Mass Analyser) is a time-of-flight secondary
ion mass spectrometer (TOF-SIMS) on board the Rosetta space mission. COSIMA has
been designed to measure the composition of cometary dust grains. It has a mass
resolution m/{\Delta}m of 1400 at mass 100 u, thus enabling the discrimination
of inorganic mass peaks from organic ones in the mass spectra. We have
evaluated the identification capabilities of the reference model of COSIMA for
inorganic compounds using a suite of terrestrial minerals that are relevant for
cometary science. Ground calibration demonstrated that the performances of the
flight model were similar to that of the reference model. The list of minerals
used in this study was chosen based on the mineralogy of meteorites,
interplanetary dust particles and Stardust samples. It contains anhydrous and
hydrous ferromagnesian silicates, refractory silicates and oxides (present in
meteoritic Ca-Al-rich inclusions), carbonates, and Fe-Ni sulfides. From the
analyses of these minerals, we have calculated relative sensitivity factors for
a suite of major and minor elements in order to provide a basis for element
quantification for the possible identification of major mineral classes present
in the cometary grains.
