 Researchers also investigated the physical state of the interior of CoRoT-7b, indicating as likely a solid iron core, thus a self-generated magnetic field should be absent on the planet.Due to the high temperatures on the illuminated side of the planet, and the likelihood that all surface volatiles have been depleted, silicate rock vaporization may have produced a tenuous atmosphere (with a pressure approaching 1 Pa or 10−2 mbar at 2500 K) consisting predominantly of sodium, O2, O and silicon monoxide, as well as smaller amounts of potassium and other metals.Magnesium (Mg), aluminium (Al), calcium (Ca), silicon (Si), and iron (Fe) may rain out from such an atmosphere on the planet's daylight side in the form of particles of minerals, such as enstatite, corundum and spinel, wollastonite, silica, and iron (II) oxide, that would condense at altitudes below 10 km.