Earnshaw

Cook R J 1979 Atomic motion in resonant radiation an application of Earnshaw s theorem Phys.Rev. 

Ashkin A and Gordon J P 1983 Stability of radiation-pressure particle traps an optical Earnshaw theorem Opt. Lett. 8 511-13... 

Greenwood NN, Earnshaw A (1997) Chemistry of the elements, 2nd edn. Butterworth Heineman, Oxford... 

The ions that tend to be involved in AB cements include such species as Al , Mg, Ca and Zn. These are all capable of developing a coordination number of six, and hexaquo cations are known to be formed by each of these metal ions (Huckel, 1950). The typical requirements for an ion to develop such coordination characteristics are that the ion should exist in the -I- 2 or -1-3 oxidation state, and in this state should be of small ionic radius (Greenwood Earnshaw, 1984). 

Earnshaw, R. (1960a). Investments for casting cobalt-chromium alloys. Part I. British Dental Journal, 108, 389-96. 

Fig. 31. Fractal structures obtained experimentally at different stages of aggregation of a colloidal monolayer of 1 /im sulfonated polystyrene particles on the surface of an aqueous calcium chloride solution, initially uniformly distributed (Robinson and Earnshaw, 1992).

N. N. Greenwood and A. Earnshaw, Chemistry of the Elements, 1984, Pergamon Press, Oxford. 

Greenwood, N. N., and Earnshaw, A. (1997). Chemistry of the Elements, 2nd ed. Butterworth-Heinemann, New York. Although this is a standard reference text on descriptive chemistry, it contains an enormous body of information on bonding. 

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