Dome structures

The most remarkable feature in the Mni4Al5,5+xGe3.x structure is noted in the second shell structure that surrounds the [Mn Al9Ge] clusters (Fig. 12.2b). The top half of the shell manifests a dome structure made of all triangular faces, while the ill-shaped bottom half is formed with randomly fused triangular and... 

Figure 3.2 A zone of obsidian in a rhyolite flow-dome structure. (Redrawn with permission from Hughes and Smith, 1993 Figure 2A.)...

The triprotic corroles 64 form monoorganotin complexes of the type RSnlv(Cor). PhSn(Cor) is formed when octaethylcorrole reacts with diphenyltin oxide, or phenylmagnesium bromide reacts with ClSn(Cor). The tin is five-coordinate, and is placed 72.2(3) pm above the plane of the four nitrogen atoms, with the corrole assuming a domed structure. The compound is reversibly reduced by transfer of one electron into the 7r-system.511... 

Figure 4.19C shows Ceo, which is one type of fullerene discovered in 1985. It was given the name buckminsterfullerene because it resembles the geodesic-domed structure designed by architect R. Buckminster Fuller. Also known as buckyballs, Ceo is just one of several fullerenes that have been discovered. Others have been shown to have the formula C70, C74, and C82. Because of their spherical shape, researchers have speculated that fullerenes might make good lubricants. 

Fig. 7.22 Construction of the heavily reinforced toroid-shaped dome structures for the Ninian Platform in Scotland (courtesy SKW, Trostberg, Germany).

Harvested and delivered whole, the trees are dried in an air-supported fiber glass dome structure over a 30-d period by using waste heat from the combustion process in the adjacent plant (Fig. 5). Trees leave the dome on die conveyor and, at the boiler wall, batches are cut into sections to fit the boiler. These sections are about 8.5 m long for die 100-MW facility studied by EPRI and the Minnesota Power Light Company. 

Sulfur constitutes about 0.052 wt % of the earth s crust. The forms in which it is ordinarily found include elemental or native sulfur in unconsolidated volcanic rocks, in anhydrite over salt-dome structures, and in bedded anhydrite or gypsum evaporate basin formations combined sulfur in metal sulfide ores and mineral sulfates hydrogen sulfide in natural gas organic sulfur compounds in petroleum and tar sands and a combination of both pyritic and organic sulfur compounds in coal (qv). 

Evaponte Basin Sulfur Deposits. Elemental sulfur occurs in another type of subsurface deposit similar to the salt-dome structures in that the sulfur is associated with anhydrite or gypsum. The deposits are sedimentary, however, and occur in huge evaporite basins. It is believed that the sulfur in these deposits, like that in the Gulf Coast salt domes, was derived by hydrocarbon reduction of the sulfate material and assisted by anaerobic bacteria. The sulfur deposits in Italy (Sicily), Poland, Iraq, the CIS, and the United States (western Texas) are included in this category. 

Fig. 4. Example of a salt-dome structural nap, One of the earliest and greatest reservoirs of this type was Spindletop, brought into production in 1901 and located near Beaumont, Texas...

Tarnai, T. Wenninger, M. J. 1990 Spherical circle-coverings and geodesic domes. Structural Topology 16, 5-21. 

Metcalf, G.S. and White, W.E. 2003. Method of constructing insulated metal dome structure for a rocket motor. U.S. Patent 6,544,936. 

Sulfur produced from salt-dome structures can be quite pure, but it often contains up to 1 percent of bituminous residues, which... 

A primary geological requirement for the success of the Erasch process lies in the unusual salt dome structures which occur in Louisiana, Texas, and parts of Mexico in the coast area of the Gulf of Mexico (Fig. 9.3). Only about 28 of the some 400 or so known dome formations in the area have produced commercial quantities of sulfur, because only a relatively few possess all the correct geological features to enable exploitation [16]. Nevertheless, enormous reserves are accessible from a single dome with the right features. One dome in Texas, for example, has produced 12 million tonnes of sulfur during... 

De Lange, G.J., and Brumsack, H.-J., 1998. The occurrence of gas hydrates in Eastern Mediterranean mud dome structures as indicated by pore-water composition, in Henriet, J.P., and Mienert, J., eds.. Gas Hydrates Relevance to World Margin Stability and Climate Change, Special Publications, 137 London, Geological Society, pp. 167-175. 

Some GRP dome structures supported by metal frames were constructed in the mid-1970s for the Sharjah International Airport Terminal Building, United Arab Emirates and these were recently inspected. The cream, isophthalic gelcoat was complete but appeared dull when viewed close-up and a few blisters were seen. However, the laminate structure was sound with no signs of delamination. 

Another piece of big news for the inorganic chemist in the late 1900s turned out to be big news for organic, physical, analytical, and biochemists, too. This was the discovery of a third solid form of carbon— the other two being diamond and carbon. This one forms a sphere shaped like the geodesic dome structure designed by the U.S. philosopher and engineer R. Buckminster Fuller it is named appropriately buckminsterfullerene. 

D woven textile stmctiues can be produced in multilayer, hollow shape, nodal or dome structures (Chen et ah, 2011), which all have different characteristics of interest in medical textile applications. 

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