Radion structures are notably scarce, found in only two locations in Phendrana Drifts. The first is a decorative grating in the Phendrana Shorelines. The other instance is the Radion based outer casing of the fuel cells beneath one of the large tower structures in the Control Tower. The Radion casing can be destroyed with Missiles, opening the way to the Artifact of Elder.
- "Samus's Notes:
Missiles fired with a lock-on will seek their targets.
Missiles can destroy objects made from Radion or Brinstone." —Samus's Notes (Metroid Prime)
- "Grating has become brittle from temperature fluctuations. Large traces of Radion detected." —Scan Data (Metroid Prime)
- "There is a large fuel cell attached to the base of this tower.
Energy readings detect rapid fluctuations in power levels. The Radion based outer casing of the structure appears damaged and unstable." —Scan Data (Metroid Prime)