Marble, White

Georgia Marble White 8 Calcium carbonate, 40-80 micron GeoMar... 

Morris and Thomson have described the isolation, from the wings of the Marbled White butterfly Melanargia galathea), of a glycoside which, on acid hydrolysis, gives lutexin and (probably) lutonaretin. This glycoside (which appears to be different from lutonarin) is probably derived from the food of the butterfly larvae. 

Georgia Marble White 8 calcium carbonate Gluconic Acid Solution (50%)... 

Marble white was also a term applied to a combination of lead sulfate and zinc oxide used for housepainting (Laurie, 1895), though Doemer (1935) lists this as a synonym for chalk. 

Whiting at one time coimoted only a very fine form of chalk of micrometer sizes but the term is now used more broadly to include all finely divided, meticulously milled carbonates derived from high calcium or dolomitic limestone, marble, shell, or chemically precipitated calcium carbonate. Unlike all of the above natural forms of limestone, it is strictly a manufactured product. 

Plastics. The fastest-growing use of whiting (microcarbonate fillers) is in the plastics industry where dry, pulverized limestone is used intensively for most types of plastics. Other carbonate fillers, precipitated calcium carbonate, oyster sheU, marble, and wet-ground limestone, are also used. 

White Hydroxide. Tlie soda sinter process appHed to bauxite or bauxite residue produces a hydroxide that is completely free from organic coloring matter and is very wliite. A value of more than 95% is obtained on the GE brightness scale relative to Ti02 as followed in the paper (qv) industry. Tliis compares to about 70% on the same scale for the nomial Bayer product. Tlie wliite hydroxide is preferred in the paper, toothpaste, and artificial marble industries. 

Marmor-kalk, m. lime from marble, -kiesel, m. a kind of hornstone. -lack, m. marble varnish. -mehl, fi. marble dust, -papier, n. marbled paper, -weiss, n. whiting (as a pigment). -zement, m. marble cement specif., Keene s cement. 

Silver white, relatively soft metal that is only applied in alloys. Oxygen and water attack pure Ca. The most prominent compound is the oxide (CaO) = burnt calcium, which hardens to calcium carbonate in mortar. Annual production of about 120 million tons. Burnt gypsum (CaS04 0.5 H20) hardens with water. A great step in evolution was the replacement of hard shells of brittle calcium carbonate by an internal skeleton of tough calcium phosphate (hydroxylapatite)-protein composite. Calcium is essential for all life forms. The daily requirement is 0.7-1.0 g. Humans (70 kg) contain 1 kg of calcium. Calcium silicate is the main component of cement. Marble is calcium carbonate in polycrystalline form and the favorite material of sculptors. 

Marble. The word marble is used as the common name for two types of monomineral rocks one derived from limestone and therefore composed of calcium carbonate, the other derived from dolomite and composed of calcium magnesium carbonate. Extremely high pressures and heat during past geological times modified the structure of both limestone and dolomite, compacting them into a characteristic crystal structure. Most marble is white however, minor and trace amounts of metallic impurities cause the formation of stains in a variety of colors, hues, and patterns, or of colored marble. 

Marble occurs in many locations on the crust of the earth, so that many types of marble were known to the ancients. White Pentelic marble, from... 

Limestone varieties differ greatly from one another in their texture and the impurities they contain, and consequently they also differ in color. The color of limestone may vary from white (when it contains practically no impurities) to off-white and even to intensely colored. Minor inclusions within the limestone structure are often of silica, usually in a concentration below 5%, as well as feldspar and clay in still lesser amounts. Many types of limestone also include embedded fossils. Much limestone deposits in the outer crust of the earth are altered during geologic metamorphic processes that involve mainly pressure and heat but also liquids and gases. Marble, for example, a metamorphic rock derived from calcium carbonate, is white when composed only of this substance colored metal ions and other impurities impart to marble a wide range of colors such as red, yellow, and green and also give... 

Maniatis, Y. (2004), Scientific techniques and methodologies for the provenance of white marbles, Proc. Int. School of Physics "Enrico Fermi" 154 (Physics Methods in Archaeometry), pp. 179-202. 

Mathews, K. J. (1997), The establishment of a data base of neutron activation analysis of white marble, Archaeometry 39, 321-332. 

Walker, S. and K. Matthews (1988), Recent work in stable isotope analysis of white marble at the British Museum, in Fant, J. C. (ed.), Ancient Marble Quarrying and Trade, B.A.R., International Series, Vol. 453, Oxford, UK, pp. 117-125. 

CaC03, a white solid which occurs in nature as chalk, limestone and marble the ground product, often termed whiting, is used as an extending filler in rubber compounding. 

Finely-divided calcium carbonate obtained from natural sources (chalk, limestone or marble) or as a by-product of another chemical process -precipitated whiting. Strictly speaking, the term whiting should be applied only to material prepared by grinding natural chalk . 

The Hall of Great Bliss contains an altar of jet. The walls and floor are of darkest indigo, supporting a faceted crystal dome that refracts the white brilliance from the White Sun over the battlements. There are three pillars, two black and one of scarlet marble. The eastern throne is of purest alabaster. The tarot tapestries which hang in the chamber are those of Keys I, III, VI and VII. 

The Arnold Pit is on the steeply dipping, overturned limb of the Sylvia Lake Syncline, the structural hanging wall is the stratigraphic footwall. Commercial talc occurs in Unit 13 near the contact with Unit 14 of the Upper Marble from the metamorphism or impure evaporative dolomite. The upper section of Unit 13 grades from tremolite-rich talc ore into a pure talc schist up section. Unit 12 is a white massive doiomitic marble with convolute bands of grey and orange to... 

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