Class H Intended for use as a basic well cement from surface to 8,000 ft (2,440 m) depth as manufactured, and can be used with accelerators and retarders to cover a wide range of well depths and temperatures. No additions other than calcium sulfate or water, or both, shall be interground or blended with the clinker during manufacture of Class H well cement. Available in moderate and high- (tentative) sulfate-resistant types. [Pg.1183]

The fomier is iisefiil but the latter tends to overestimate the well depth. A hamionic mean rule [Pg.206]

Hential is an exponential-6 potential with just two parameters the mirrimum energy 5 and the well depth e [Hill 1948] [Pg.228]

The attraction for two neutral atoms separated by more than four Angstroms is approximately zero. The depth of the potential wells is minimal. For the AMBER force field, hydrogen bonds have well depths of about 0.5 kcal/mol the magnitude of individual van der Waals well depths is usually less. [Pg.27]

The relative separation is scaled by a, the distance at which the Leimard-Jones first passes tlirough zero. The energy is scaled by the well depth, s. [Pg.665]

This is similar in spirit to the arithmetic-mean rule but with each individual r,) being weighted according to the square of its value. The well depth in this function starts with a formula proposed by Slater and Kirkwood for the Cg coefficient of the dispersion series expansion [Pg.229]

Here, k is a factor which converts to units (kcal/mol in this case where the distances are in A and the polarisabilities in A ). G, and Gj are constants chosen to reproduce the well depths for like-with-like interactions. The atomic polarisability values are obtained from an examination of appropriate molecular experimental data (such as measurements of molar refractivity). [Pg.229]

Figure 2.10. Part of the better description of the Morse and Exp.-6 potentials may be due to the fact that they have three parameters, while the Lennard-Jones potential only employs two. Since the equilibrium distance and the well depth fix two constants, there is no additional flexibility in the Lennard-Jones function to fit the form of the repulsive interaction. |

The venerable bireciprocal potential consists of a repulsive tenn A/t and an attractive temi -B/r with n > m. This potential fiinction was introduced by Mie [118] but is usually named after Leimard-Jones who used it extensively. Almost invariably, / = 6 is chosen so that the attractive tenn represents the leading dispersion tenn. Many different choices of n have been used, but the most connnon is n = 12 because of its computational convenience. The Leimard-Jones (12,6) potential can be written in tenns of the well depth (s) and either the minimum position or the zero potential location (a) as [Pg.205]

See also in sourсe #XX -- [ Pg.95 ]

See also in sourсe #XX -- [ Pg.331 ]

See also in sourсe #XX -- [ Pg.214 ]

See also in sourсe #XX -- [ Pg.187 ]

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