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Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals with chemical formula K(Li,Al) 3 (Al,Si,Rb) 4 O 10 (F,OH) 2. [ 2 ] [ 3 ] It is the most abundant lithium -bearing mineral [ 4 ] and is a secondary source of this metal.
The King Wolf, pyrography on olive wood by Roberto Frangioni Piroritrattista Framàr. Pyrography or pyrogravure is the free handed art of decorating wood or other materials with burn marks resulting from the controlled application of a heated object such as a poker. It is also known as pokerwork or wood burning. [1]
Clean-burning stove – a stove with reduced toxic emissions. The term commonly refers to wood-burning stoves for domestic heating, although it is also applied to cooking stoves. Cocklestove or ceramic stove or tile stove; Community Cooker; Cook stove – heated by burning wood, charcoal, animal dung or crop residue.
The tinder may be placed between two slats of wood with the third piece or "saw" drawn over them above the tinder so as to catch a coal, but there is more than one configuration. A fire-thong uses a non-melting cord, ratan, or flexible strip of wood to 'saw' the wood creating friction. On the board, opposite side the cord, is a well with a hole ...
Wolfgang Schroeter invented the first wood-burning stove with a cast iron frame and glass door. This allowed the user to see the fire burning inside the stove. [16] A fireplace insert converts a wood-burning fireplace to a wood-burning stove. A fireplace insert is a self-contained unit that rests inside the existing fireplace and chimney.
The oldest decorated wooden object ever found in Britain has been discovered near Stonehenge. ... 6,000-year-old wood carving could solve Stonehenge mystery. David Keys. June 8, 2023 at 1:30 AM ...
A classic Scandinavian style round ceramic stove, which fits in the corner of a room, from the porcelaine manufacturer Rörstrand in Stockholm, c. 1900. A masonry heater (also called a masonry stove) is a device for warming an interior space through radiant heating, by capturing the heat from periodic burning of fuel (usually wood), and then radiating the heat at a fairly constant temperature ...
Rubidium was discovered in 1861 by Robert Bunsen and Gustav Kirchhoff, in Heidelberg, Germany, in the mineral lepidolite through flame spectroscopy. Because of the bright red lines in its emission spectrum, they chose a name derived from the Latin word rubidus, meaning "deep red". [39] [40] Rubidium is a minor component in lepidolite.