Mantle
The mantle is the region of Earth that lies between 30/35-2,900km below the surface. Found here are: olivines, pyroxenes, and the silicate perovskite, a dense form of enstatite.
The upper mantle is known as the asthenosphere.
Refer to Earth for detailed information on the interior of the planet.
A mantle is an organ possessed by molluscs used to secrete their shells.
A mantle is also a device used in Gas lamps and Kerosene lamps to produce a bright light.
A mantle is basically a small sock made of silk or asbestos. Asbestos can withstand high temperatures, but is also toxic. Silk-based mantles are extremely brittle once first burned, and must be replaced frequently.
The traditional mantle is coated in thorium, which when heated enough (with burning gas or kerosene vapour) incandescess brightly.
Thorium is radioactive, and pure thorium becomes more radioactive as it ages owing to its decay products. It should be handled with care. Owing to concerns about the radioactivity of thorium, alternatives are now used in some countries, but these are more expensive and less efficient.
A mantle (also mantel) is the stone or wood beam which serves as a support for the structure above a Fireplace, together with the whole framework, whether of wood, stone, etc., that acts as an ornament of the same.
