The mineral is halite, whose main chemical component is Sodium Chloride (NaCl). Halite is an evaporite mineral-i.e. it forms as a result of evaporating water leaving behind â¦ dissolved chemicals as mineral deposits.
Passive Solar Energy Definition. Passive solar energy is the heating space that utilizes the design of the house or building so as trap solar heat when necessary. This means that the passive solar ensures that the house is not too cold during winter and not too hot in the summer.
In fact, the characterizations active and passive do not refer to the performance of the respective systems but they describe the technical means which are applied in each case. Passive use of solar energy can be as effective as, or even better than active use of solar energy. Moreover, because of lacking mechanical devices and the absence of auxiliary energy, passive systems have the chance to be more economic.