Monotanium

• Incredibly dense metallic alloy
• Commonly used in Hirogen starship hull construction (VOY: "Hunters", "Prey"; DS9 Novel: Demons of Air and Darkness)
• Incredibly resistant to weapons fire (VOY: "Prey")
• High density leads to natural scattering of most sensor and targeting beams (VOY: "Hunters")
• Presumably related to tritanium and/or titanium