Impervium

Impervium, a metal unique to Solonae, is found only in a few systems and is one of the strongest materials in the galaxy.

Although it is incredibly dense, and is almost completely resistant to kinetic energy - able to redirect the energy away - it is very susceptible to incredibly high temperatures as its molecular bonds begin to decay under the heat.

However, with a melting point of 3000 degrees Kelvin, Impervium does not break quickly, even under extremely hot conditions.

Availability:
Impervium is a very rare material on the cosmic scale - meaning that although it is very difficult to obtain, there are asteroids and worlds teeming with pure Impervium deposits just waiting to be discovered.

Most of the known Impervium deposits are in the Arcadian Republic, as after the Confederate War they dedicated themselves to ensuring the warring Immuni tribes, and later the fledgling Immuni Empire, would never again have the resources to construct a fleet of battle-ready Impervium-coated warships.

The Republic's largest deposit is on their homeworld of Arcadia, with several large-scale mining operations active on the Athurian homeworld as well.

The Empire, relegated to asteroid-bound deposits after the destruction of their main source on Kharadris, has had to adapt their technology and construction methods to cope with a much smaller supply of the metal.