  Chondritic meteorites are of great interest since they are one of the most
ancient remnants of the early solar system. Some of them, like the carbonaceous
CM meteorites experienced aqueous alteration thus their olivine content
transformed more or less into hydrated silicates such as phyllosilicates. These
hydrated CM2 meteorites have been investigated in KBr pellets by means of
Fourier transform infrared (FT-IR) spectroscopy. In our focus of interest was
to study the 3 and 10 $\mu$m (3000 and 1000 cm$^{-1}$, the O$-$H and silicate
streching) bands of several CM2 chondrites. By investigating these signals the
water content and the extent of hydration can be determined. In order to
achieve this, development of a new pellet production method was essential. This
technique facilitates the elimination of adsorbed water coming from the
surrounding environment, which would complicate correct interpretation of the
results.
