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       SEMINAR OF THE LABORATORY FOR COMPUTER DESIGN OF MATERIALS
        Institute for Computational Sciences and Informatics
		CSI 929  (http://science.gmu.edu/physics)
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       SPATIAL ORDERING AND STRUCTURE FACTOR SCALING IN THE SIMULATIONS
			OF COLLOID AGGREGATION

		           Agustin E. Gonzalez
	Institut of Physics, Universidad nacional Autonoma de Mexico

	The observation of spatial ordering of clusters that leads to 
	a spinodal-type scaling of the structure factor S(q), in the 3D
	simulations of diffusion-limited colloid aggregation, is repor-
	ted. We unambiguosly identify the peak in S(q) as arising from
	the correlation between particles belonging to nearest neighbor
	clusters. The S(q) has a terminal shape that corresponds to a
	close-packing of the clusters after gelation, in a concentration
	range larger than the one suggested in recent experiments. A
	finite-q peak in S(q) from the simulations of reaction-limited
	colloid aggregation is also found.
	
                           Monday , March 11 1996
                                  5:00 pm
                          Room 206, Science & Tech. I
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Date is correct!! First day of Spring break. 
                  There will not be seminar on March 18