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Crystalline Fracture

Properties oi the alkali hydroxides.—The alkali hydroxides are brittle, white, translucent solids with a more or less crystalline fracture, and fibrous texture. Sodium hydroxide deliquesces on exposure to the air, but it goes solid again owing to the formation of the carbonate by the absorption of carbon dioxide from the air. Lithium hydroxide is a little hygroscopic. Potassium hydroxide is even more deliquescent than the sodium compound but its carbonate is also deliquescent. The hydroxides are very solnble in water, and they also dissolve in alcohol. The reported numbers for the specific gravities22 of sodium hydroxide range from l-723 to 2T30 and for potassium hydroxide, from l-958 to 2 6. The best representative sp. gr. are 2"54 for lithium hydroxide 2130 for sodium hydroxide 2 044 for potassium hydroxide 3"203 (11°) for rubidium hydroxide and 3-675 (11°) for csesium hydroxide. [Pg.500]

Hydrate of potassa is a white opaque mass, which, when broken, exhibits a crystalline fracture. Its specific gravity is 17. It fuses at a low-red heat, and at a white heat volatilizes unaltered. Its teste is acrid and corrosive. It has a strongly alkaline reaction, a rapid Bolvent action on animal matters, and is the most powerful base known. Its formula is KO, II0 it is very deliquescent, very soluble in water, and crystal-lizable. The following table, deduced from Dalton s experiments, shows the quantity of anhydrous potassa contained in solutions of various densities —... [Pg.726]

White, very hygroscopic, slicks or pieces, cxhihiling n crystalline fracture. The preparation conlnius at least () per cent of KOII. [Pg.170]

While, very hygroscopic slicks or pieces which exhibit a crystalline fracture. The preparation should contain at. least. SO per cent of K[Pg.171]

Colorless, lustrous crystals or sticks, exhibiting a stellate, crystalline fracture, and yielding a clear, colorless solution... [Pg.186]

White, very hygroscopic sticks or pieces, exhibiting a crystalline fracture. The preparation contains 95 to 98 per cent of NaOH. [Pg.204]

B. Pelletier23 obtained an antimony phosphide by the action of molten antimony on metaphosphoric acid with or without admixed carbon. B. Pelletier, and G. Landgrebe obtained a phosphide by the action of phosphorus on molten antimony, although W. Ramsay and R. W. E. Mclvor could obtain a product with only 1546 per cent, by direct action. The last-named prepared antimony monophosphide, SbP, by the action of phosphorus on a soln. of antimony tribromide in carbon disulphide. M. Ragg could not prepare the monophosphide by this process, nor by the action of phosphine on tartar emetic, or antimony trichloride. The phosphide prepared by the fusion processes is a brittle, white mass with a crystalline fracture the precipitated product is a red powder insoluble in carbon disulphide, ether, and benzene. O. Ruff found that phosphorus reacts with antimony chloride in the presence of aluminium chloride—vide supra, arsenic oxyphosphide. [Pg.851]

Lattice imaging studies by TEM on a "young" fraction showed extensive regions of crystallinity with minimal evidence of crystallite fracturing. By contrast, similar investigations of an "old" fraction, combined with in situ compositional analysis, revealed small "islands" of crystallinity within a "sea" of disordered material that was once crystalline. Fracture lines at crystallite boundaries are absent. Instead, the small USY crystallites within the "old" fraction are in intimate mixture with the collapsed zeolite. [Pg.114]

White, very hygroscopic Hficlcs or pi( c(w. <-NhiI iiing a crystalline fracture. The preparalion conliiiu.s at i( isf SO per cent of KOII. [Pg.170]

Molybdenum Carbides.—The carbide, MojC, may be obtained by heating molybdenum dioxide with carbon or with calcium carbide in an electric furnace. The product shows a brilliant, white, crystalline fracture, cleaves readily, and has a density of 8-9. If a mixture of fused molybdenum, carbon, and excess of aluminium is heated in the electric furnace, the carbide, MoC, is obtained as a grey crystalline powder, of density 8-40 at 20° C., and of hardness 7 to 8. It burns readily in fluorine, forming carbon tetrafluoride and molybdenum... [Pg.169]

Potassium hydroxide occurs as a white or nearly white fused mass. It is available in small pellets, flakes, sticks and other shapes or forms. It is hard and brittle and shows a crystalline fracture. Potassium hydroxide is hygroscopic and deliquescent on exposure to air, it rapidly absorbs carbon dioxide and water with the formation of potassium carbonate. [Pg.605]

Properties White, deliquescent pieces, lumps, sticks, pellets, or flakes having a crystalline fracture. D 2.044, mp 405C (varies with water content). Keep well stoppered, absorbs water and carbon dioxide from the air. Soluble in water, alcohol, glycerol slightly soluble in ether. [Pg.1032]

White, somewhat translucent, slightly unctuous masses with crystalline fracture and pearly luster, almost odorless and tasteless but becomes yellow and rancid on long exposure to air- d 0.938-0.944 mp 42-5CT rtg1 about 1.4330. Sapon no. 120-136. Iodine no. 3-4.4. Insol in water or cold alcohol. Sol in chloroform, ether, carbon disulfide, oils, boiling alcohol slightly sol in petr ether. [Pg.1379]

FIGURE 16.5 Surface of a fragment of the sample destroyed at a punch speed of 650 m/s a - general view, b - a zone with slip bands, c - crystalline fracture zone. [Pg.187]

Genter, A., Evans, K., Cuenot, N., Fritsch, D. Sanjuan, B., 2010. Contribution of the exploration of deep crystalline fractured reservoir of Soultz to the knowledge of enhanced geothermal systems (EGS). Comptes Rendus Geoscience, 342, 502-516. [Pg.1530]


See other pages where Crystalline Fracture is mentioned: [Pg.414]    [Pg.818]    [Pg.1064]    [Pg.738]    [Pg.838]    [Pg.846]    [Pg.848]    [Pg.172]    [Pg.31]    [Pg.130]    [Pg.1163]    [Pg.308]    [Pg.261]    [Pg.1363]    [Pg.468]    [Pg.28]    [Pg.9]    [Pg.185]   
See also in sourсe #XX -- [ Pg.20 , Pg.82 ]




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