chlorideen
Chlorideen is a fictional chemical compound that appears in the popular science fiction novel "The Martian Chronicles" by Ray Bradbury. Within the narrative, chlorideen is a substance used by the Martian inhabitants to create a protective dome or shield, referred to as a "chlorideen dome." This dome is designed to protect them from the harsh environment of Mars, specifically from the dry, arid conditions and possibly the radiation. The precise chemical composition and properties of chlorideen are not scientifically detailed in the novel, as Bradbury's focus is on the thematic and allegorical aspects of his story rather than hard science. The concept of the chlorideen dome serves as a symbol of the Martians' advanced, albeit ultimately doomed, civilization and their attempts to adapt to or control their environment. The substance itself is presented as a marvel of Martian engineering, capable of creating a barrier that sustains life where it would otherwise be impossible. Its fictional nature allows for its use as a plot device to highlight the differences and eventual clash between the technologically advanced but dwindling Martian race and the more resilient, adaptable human colonizers.