Thalaron radiation
Thalaron radiation is a technobabble weapon featured in Star Trek: Nemesis. It is supposedly capable of destroying living tissue on a planetary scale, although the description of this ability is completely nonsensical. The amount stated to be required for this feat is "microscopic". Radiation does not fill a volume the way a liquid or solid does. Think of saying "a microscopic amount of sunlight". Its also described as a "biogenic" weapon which is meaningless as "biogenic" simply means "something produced by living organisms"
Nevertheless, its effects are quite observable when a medallion-sized device is used to assassinate the Romulan senate at the start of the film. Within a matter of seconds, the bodies of the senators are transformed into a substance resembling stone, although it is rather brittle; the bodies shattered when they toppeled over and hit the ground.