| Abstract |
Large amount of silicate dust grains has been detected in many astronomical environments. However, silicate dust grain formation itself is not well understood yet. Although theoretical simulations for possible condensates illustrate how abundant the different silicate dust materials are in astronomical surroundings and they give us a key to clarify the formation of silicates, these simulations do not cover all dust species which possibly exist. In order to deepen the understanding from the first species condensing out of the gas to the entire condensation sequence of dust materials present in the environments, first we take into account the species which contain minor elements (Al, Na, and Li) and perform the mid-IR spectroscopic measurements for obtaining benchmark spectra. |
