Hydrated-type

The carbonates, sulfates, nitrates, and haUdes of lead (except the yeUow iodide) are colodess. Bivalent lead forms a soluble nitrate, chlorate, and acetate a slightly soluble chloride and an insoluble sulfate, carbonate, chromate, phosphate, molybdate, and sulfide. Highly crystalline basic lead salts of both anhydrous and hydrated types are readily formed. Tetrabasic lead sulfate [52732-72-6] 4PbO PbSO, and the hydrated tribasic salt [12397-06-7] ... 

Type IV (Low Heat of Hydration). Type IV is used where the rate and amount of heat generated from hydration have to be minimised, ie, large dams. Compared to Type I, Type IV Pordand cement has only about 40 to 60% of the heat of hydration during the tirst seven days and cures at a slower rate. In large stmctures such as dams where the heat of hydration cannot be readily released from the core of the stmcture, the concrete may cure at an elevated temperature, and thermal stresses can build up in the stmcture because of nonuniform cooling that weakens the stmcture. U.S. production of Type IV Pordand cement is less than 1%. 

A comparison of boehmite with other raw materials is included in Table 6. In this table the soda and lithia contents of compositions based on a range of raw materials and the resultant properties are detailed. The level of / "-alumina was always higher with the hydrate-type raw material the hydrothermally prepared raw materials gave the highest content of / " -alumina. 

Sisson has traced the evolution of current concepts of the crystalline part of cellulose structures. The fiber diagram obtained by X-ray diffraction is now known to be produced by a series of elementary crystals, called crystallites, which have a definite arrangement with respect to the fiber axis. It is also known that the crystallites in regenerated cellulose may be oriented to varying degrees with respect to the fiber axis and that the crystallites in regenerated cellulose and mercerized cotton differ from those in native fibers. These hydrate type crystallites appear to be more reactive chemically than the native type. 

Although beryllium and magnesium salts do not form stable mctal-ammines yet they unite with ammonia, forming additive compounds of the hydrate type which are sometimes referred to as ammoniates or ammonio-compounds. These appear to be of the same type as the metal-anunines, and the difference seems to be merely one of stability. The ammonio-compounds are formed by the addition of ammonia gas to dry or fused salt, and most of them decompose with liberation of ammonia when dissolved in water. 

Hydrate Crystal Structures and Hydrate Type Definitions... 

The summary of hydration types in Table 2 can be used as a basis for the description of the hydration of more complicated solutes. For example, with reference to the ion C4H9N+H3, state II.,... 

In the simplest type, water is bound to inorganic cations as part of a coordination complex. This type of water is denoted as water of crystallization and is common for inorganic compounds. For example, nickel sulfate forms a well-defined hexahydrate, where the waters of hydration are bound directly to the Ni(II) ion. Well-defined multiple hydrate species can also form with organic molecules, where the water molecules bridge unit cells in the overall structure. Finally, water molecules can exist in a semispecific manner, lining cavities within the crystal structure. This last hydrate type is often termed a channel hydrate. 

For addition compounds containing water as a component, the class name hydrates is acceptable because of well established use, even though the ending ate might seem to indicate an anionic component. For hydrates with a simple stoichiometry, names of the classical hydrate type are acceptable, but rules have not been formulated for non-integer stoichiometries such as that in Example 12 below. Also, because of their ambiguity, the... 

The conclusions drawn on the basis of the dielectric loss analysis of liquid samples, support the interpretation that a very gradual confluence of the different types of dispersions takes place.Such an interpretation could explain the instauration of polydispersed samples in terms of the coexistence, at equilibrium, first, of micellar aggregates with w/o microemulsion droplets and, successively, of a microemulsion with l-I O-per hydrophilic group monolayer, in equilibrium with a hydrated type of microemulsion (U-water molecule per polar head of the surfactant hydrophilic groups monolayer). The latter interpretation is in accordance with Steinbach and Sucker findings that the two types of structures ( 1-HpO and U-HgO molecule), may coexist at equilibrium (23.). 

Tiger Jifii-Soak. ptockw lime] Finish hydrate type S. 

Chlorine is a greenish gas. It is moderately soluble in water with which it reacts (see page 476). When chlorine is passed into dilute solutions of CaCl2 at 0°, feathery crystals of chlorine hydrate, Cl2 TJHjO, are formed. This substance is a clathrate of the gas-hydrate type (see page 160), having all medium holes and 20% of the small holes in the structure filled with chlorine molecules. 

The Formation of Ciathrates Having a Water Host Lattice 16.2.2.1. Ciathrates of the Gas Hydrate Type. 

In isoamyl ammonium salts hydrates (type III structure) the host lattice is based on the two-dimensional packing of pentagonal dodecahedra sharing faces. Between these layers of polyhedra are larger tetrakaidecahedra and pentakaidecahedra. The tetraisoamyl ammonium cation lies in a large cavity formed by two tetrakaidecahedra and two pentakaidecahedra, as shown on Fig. 1. 

In tetra-n-butyl ammonium salts hydrates (type IV structure), the host lattice is formed by the association of slightly distorted dodecahedra sharing faces forming groups... 

Tiger Aero Air Entraining. [Rockwell Lime] Masons hydrate type S. 

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