  AGILE is a small space mission of the Italian Space Agency (ASI) devoted to
gamma-ray and hard-X astrophysics, successfully launched on April 23 2007. The
AGILE Payload is composed of three instruments: a gamma-ray imager based on a
tungsten-silicon tracker (ST), for observations in the gamma ray energy range
30MeV - 50GeV, a Silicon based X-ray detector, SuperAGILE (SA), for imaging in
the range 18keV - 60keV and a CsI(Tl) Mini-Calorimeter (MCAL) that detects
gamma rays or charged particles energy loss in the range 300keV - 100MeV. MCAL
is composed of 30 CsI(Tl) scintillator bars with photodiode readout at both
ends, arranged in two orthogonal layers. MCAL can work both as a slave of the
ST and as an independent gamma-ray detector for transients and gamma-ray bursts
detection. In this paper a detailed description of MCAL is presented together
with its performance.
