Self-assembly in the growth of precious opal
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Stewart, Andrew; Chadderton, Lewis; Senior, Brian
Description
It is proposed that primary nucleation of amorphous microspherulites of hydrated silica in natural proto-precious-opal can be followed by a long range superlattice ordering process by means of electrostatic self-assembly. Necessary conditions in the thermodynamics are a high surface charge density on microspherulite surfaces, a long Debye length and an appropriate number density of nucleation centres. A further chemical requirement is a high alkaline environmental pH ∼9-10. It is also proposed...[Show more]
Collections | ANU Research Publications |
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Date published: | 2009 |
Type: | Journal article |
URI: | http://hdl.handle.net/1885/52857 |
Source: | Journal of Crystal Growth |
DOI: | 10.1016/j.jcrysgro.2009.09.042 |
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02_Stewart_Self-assembly_in_the_growth_of_2009.pdf | 504.51 kB | Adobe PDF | Request a copy |
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