Barium-gold compounds

Siloxane compounds, in vitreous silica manufacture, 22 414 Siloxane materials, 20 240 Siloxane oligomers, in silicone polymerization, 22 555-556 Siloxanols, silylation and, 22 703 Silsesquioxane hybrids, 13 549 Silsesquioxanes, 15 188, 22 589-590 SilvaGas process, 3 696, 697 Silver (Ag), 22 636-667. See also Silver compounds. See Ag entries Argentothiosulfate complexes Batch desilverizing Lead-silver alloys Palladium-silver alloy membranes analytical methods for, 22 650-651 applications of, 22 636-637, 657-662 as bactericide, 22 656, 657, 660 barium alloys with, 3 344 in bimetallic monetary system, 22 647-648 in cast dental gold alloys, 8 307t coke formation on, 5 266 colloidal precipitation color, 7 343t colloidal suspensions, 7 275 color, 7 334, 335... 

Copper, silver, and gold in Group I show a similarity to sodium and potassium principally in the fact that they form certain compounds of the same type, for example, M20 and MCI. Zinc, cadmium, and mercury in Group II resemble calcium, barium, and strontium in that they form compounds of the types MO, MSO4, MC12, etc. In other respects, the divergence in the properties of the elements of the A and B Families is at a maximum in these two groups. 

Auribromides of sodium, barium, zinc, manganese,12 and magnesium18 have been prepared. Triple bromides of gold, silver, and rubidium (or caesium) have also been described.14 Double compounds of auric bromide and phosphorus derivatives can be obtained by methods analogous to those employed for the corresponding chlorine addition-products.15... 

Instead of platinum wire, a metal evaporation of an inert thin film (for example gold) on part of the surface of A can be used. This is what is being shown in Figure 1.5 [PER 93], the marker between the layers of bariiun caibonate and barium aluminate during tlie formation of the latter by reaction of the first compound with alumina and representing an outward development of aluminate. 

Lead is reported to be almost imique in not forming compounds of this tA pe, basic lead nitrate and chloride being the principal products formed when aqueous hexamethylenetetramine solutions are reacted with lead nitrate and lead chloride, respectively - . Complexes are reported ivith salts of lithium, sodium, potassium, copper,. silver, gold, magnesium, calcium, strontium, barium, zinc, cadmium, mercury, aluminum, titanium, lanthanum, cerium, neodymium, yttrium, erbium, thorium, tin, antimcnj, bismuth, chromium, molybdenum, tungsten, uranium, manganese, iron, cobalt, nickel, platinum, and palladium -... 

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