Argon Crystal

Argon Crystals are a rare resource that drops in the Orokin Void and in the Vay Hek Assassination mission. Unlike other resources, they decay after a limited period of time. After this period the resources will disappear from the user's inventory and must be reacquired if needed.

The timer points towards Midnight UTC/GMT+0 time indefinitely. This supports the description "Void based radioactive resource that decays every day it is out of the void"

Gathering Tips

 * Argon Crystals drop more commonly from containers and lockers. Thief's Wit and Master Thief can help in finding containers that may contain Argon Crystals.
 * Orokin Void Tower 3 Defense can get you up to five Argon Crystals in round.

Blueprints Requiring Argon Crystals
Click to view the Blueprints requiring Argon Crystals. 

Trivia

 * Argon (or Ar) is the 18th element in the Periodic table, and is a noble gas that normally does not decay as the Argon Crystal does. Its decay may be the result of it sublimating at room temperature, as the freezing point of argon is about 83.81 Kelvin.
 * This is the first resource that has the ability to degrade over time.
 * Due to a DDoS Attack on Warframe Servers (PC) the 04/15/2014, Argon Crystals won't decay until servers become stable again, although their count down remains active. [Source: DERebecca's post]