Rubidium

Rubidium was a purple-colored solid substance. It was poisonous, being potentially lethal to inhale. Rubidium could be used as fuel for vehicles or explosives, with the use of the substance in the latter leading to explosions with a purple hue.
In 5 BBY,The mention of rubidium in Sabine Wren's in-universe journal represented by Sabine My Rebel Sketchbook is set between the formation of the Spectres and the events of Star Wars Rebels: Spark of Rebellion, both of which Star Wars: Timelines dates to 5 BBY. Sabine Wren, a member of the anti–Galactic Empire rebel crew of the starship Ghost, noted in herStar Wars: Timelines journal rubidium as a possible fuel for creating purple-colored explosions. After the Galactic Civil War battle on the planet Jakku ten years later, the planet's surface became littered with the wreckage of starships and vehicles, leading to dangerous fuels such as rubidium leaking in its sand. At some point prior to her departure from Jakku in 34 ABY, the human scavenger Rey mentioned rubidium in the survival guide she was writing. She included in it a note with a visual depiction of a sample of the substance and wrote that rubidium colored sand purple, a fact that could inform scavengers to proceed with caution.
==Behind the scenes==
Rubidium was first mentioned in the current Star Wars canon in Sabine My Rebel Sketchbook, which was written by Daniel Wallace and published on February 3, 2015. Rey's Survival Guide, authored by Jason Fry, illustrated by Andrew Barthelmes, and released on December 18 of the same year, provided the first visual depiction of the substance.
In the real world, rubidium is a chemical element and metal with a silvery-white luster and a melting point of 38.9 degrees Celsius (102 degrees Fahrenheit). It is nontoxic but it ignites spontaneously in air and reacts violently with water. In nature, rubidium is generally only found as an impurity in other minerals. It is sometimes used to obtain purple color in fireworks.
==Sources==
*Sabine My Rebel Sketchbook 
*Rey's Survival Guide 
==Notes and references==
==External links==
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Category:Fuels