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Nahcolite is a soft, colourless or white carbonate mineral with the composition of sodium bicarbonate (Na H C O 3) also called thermokalite.It crystallizes in the monoclinic system.
Styrene-butadiene or styrene-butadiene rubber (SBR) describe families of synthetic rubbers derived from styrene and butadiene (the version developed by Goodyear is called Neolite [1]).
Mesolite is a tectosilicate mineral with formula Na 2 Ca 2 (Al 2 Si 3 O 10) 3 ·8H 2 O.It is a member of the zeolite group and is closely related to natrolite which it also resembles in appearance.
Zeolite exhibited in the Estonian Museum of Natural History. Zeolite is a family of several microporous, crystalline aluminosilicate materials commonly used as commercial adsorbents and catalysts. [1]
The assessment department focuses on assessing the quality of Wikipedia's Gemology and Jewelry articles. While much of the work is done in conjunction with the WP:1.0 program, the article ratings are also used within the project itself to aid in recognising excellent contributions and identifying topics in need of further work.
Straight stem with greyish bark and short, slender branches. The leaf flush is smooth, silvery copper, drooping, crowded at the ends of branchlets, and turn bright green when mature.
Margaritifera auricularia is a species of European freshwater mussel, an aquatic bivalve mollusk in the family Margaritiferidae, the freshwater pearl mussels.Formerly found throughout western and central Europe, the species is now critically endangered and is one of the rarest invertebrates worldwide, being confined to a few rivers in Spain and France.
The Butmir culture was a major Neolithic culture in central Bosnia, developed along the shores of the river Bosna, spanning from Sarajevo to Zavidovići.It was discovered in 1893, at the site located in Butmir, in the vicinity of Ilidža, which gave its name to an entire cultural group of the Late Neolithic in central Bosnia, the Butmir culture.