  In the present work the case of a chromium Bose-Einstein condensate is
considered. The model includes not only the presence of the so-called contact
interaction but also a long range and anisotropic dipole-dipole interaction has
been included. Some thermodynamical properties are analyzed. For instance, the
size of the condensate, chemical potential, speed of sound, number of
particles, etc., are deduced. It will be shown that this dipole-dipole
interaction implies the emergence of anisotropy, for example, in the speed of
sound. The possible use of this anisotropy as a tool for the analyze of
dissipative mechanisms, for instance, Landau's criterion for superfluidity,
will be also discussed.
