Metallic bronzes

The tungsten(IV) oxide crystals obtained by this procedure are polyhedra having bronze metallic luster. The crystallographic data... 

Samuel Wesley Stratton Award for Excellence in Science and Engineering, and the Department of Commerce Bronze Metal Award for Superior Federal Service. Dr. Stranick received his B.S. in chemistry from Ithaca College (1989) and his Ph.D. in chemistry from Pennsylvania State University (1995). 

If a solution containing approximately 4 mole percent sodium in ammonia is cooled below -42°C (231 K) a remarkable liquid-liquid phase separation occurs (33, 155). The solution physically separates into two distinct layers—a low-density, bronze metallic phase that floats out on top of a more dense, less concentrated dark-blue phase. The first experimental observation of this striking phenomenon in sodium-ammonia solutions was made by Kraus (109, 110) in 1907 more recent studies have mapped out the phase coexistence curves for a variety of alkali and alkaline earth metals in liquid ammonia, and these are delineated and discussed elsewhere (164). 

The corrosion process of bronze metal which is buried in soil is described in a manner similar to the weathering of mineral ores. The factors that affect the corrosion include the composition of the metal. 

Use Manufacture of phosphoric acid and other phosphorus compounds, phosphor bronzes, metallic phosphides, additive to semiconductors, electroluminescent coatings, safety matches, fertilizers. Black phosphorus... 

Galactoside, C2LM2lClO l, Idaeln tdetn. From cranberries (Vaccinium viiis idaea L., Ericaceae) Willstatter, Malli-son, Ann, 408, 15 (1915) from Winesap apple Pyrus malus Linn., Rosaceae) Duncan, Dustman, J, Am. Chem. Soc, 55, 1511 (1936), Structure and synthesis Grove, Robinson, J. Chem. Soc 1931, 2722. Red needles with bronze metallic luster from dil ethanolic HCl, dec 210-212. Sol in water, ethanol, methanol, dil HCl, Practically insol in 7% HCl. 

Galactoside hem then deca hydrate C jH2SC10125HH20. primulin. Bronze metallic needles or prisms from methanol + HCl. Bluish-violet by transmitted light. Very sol in methanol, ethanol, cold water forming deep red oln slightly sol in acetone practically insol in ethyl acetate. 

Flat needles with brassy-bronze metallic luster in reflected light, dee 162-167", Soly in water at 25 = 380 g/1. 

EINECS 215-252-9 Mosaic gold Stannic sulfide Tin bronze Tin disulphide Tin sulfide (SnS2)tin disulfide . Used for gilding and bronzing metals and other surfaces. Golden leaflets d = 4.6, insoluble in H2O, soluble in alkali, aqua regia. 

Antimony Black.—It is obtained by treating antimony solutions with zine or iron. The deposit thus obtained is in the form of powder, and is used to bronze metals or plaster. 

Space does not permit a complete discussion of the background information available on (SN)., but key landmarks in its study are summarized very briefly. Polymeric sulfur nitride was flrst prepared in 1910 by Burt (I) by passing S4N4 vapor over silver gauze or quartz wool at 100-300 °C. It was deposited outside the hot zone as very small crystals or as a fllm—when thin, the fllm was blue by transmitted light, but, as it became thicker, it became opaque and took on a bronze metallic luster by reflected light. 

K. Oh-Istii and T.R. McNelley, The Influence of Friction Stir Processing Parameters on Microstructure of As-Cast NiAl Bronze, Metall. Mater. Trans. A, Vol 36, 2005, p 1575-1585... 

F. Hasan, A. Jahanafrooz, G.W. Lorimer, and N. Ridley, The Morphology, Crystallography, and Chemistry of Phases in As-Cast Nickel-Aluminum Bronze, Metall. Trans. A, Vol 13, 1982, p 1337-1345... 

Properties Pale yish.-bronze, metallic, lustrous cryst. orgold-grn. cryst. powd. sol. in nitric acid sol. < 1 mg/ml in water, DMSO, 95% ethanol, methanol, acetone, toluene m.w. 240.25 sp.gr. 5.82 m.p. 790 C... 

The corrosion rates of mild steel, zinc, aluminum, and copper are based on the results of 5 years of exposure. The rates for bronze are based on 4 years of exposure at the same sites, except for Cape Town, where the bronze metal was exposed at Ysterplaat, near Cape Town, not at the docks. 

Alkali metals and Ca, Si and Ba dissolve in liquid ammonia. The solutions are blue in colour irrespective of the dissolved metal. Bronze metallic lustre is observed in concentrated solutions. Such solutions are paramagnetic and conduct electricity. Solvated electrons and metal cations are present in these solutions. 

Lead isotopes were the first (radiogenic) isotopes to be used to investigate ancient materials. Lead isotopic analysis has been extensively used in archeometry to trace the provenance of lead, silver, and bronze metal (mainly from the Mediterranean Bronze Age period) since the 1960s [23, 30—47]. Recently, the provenancing of ancient iron has also been attempted via Pb isotopic analysis [34, 48, 49]. These... 

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