In reply to Bob Cook's message of Wed, 11 Feb 2015 20:38:23 +0000: Hi, [snip] > > >I would use the value for the density of LiAlH listed in the handbook of >chemistry and physics as a density. This will allow a better determination of >the actual mass of the LiAlH using a packing factor for nano particles of >about 0.7 meaning about 30% of the volume is actual crystaline ALiAlH.
I think it means that about 70% is solid material, and 30% is space. (I get a figure of 0.74). >The 30% assumes spherical particles. Different shapes generally make for a >larger void fraction. They do not pack as well as spheres. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html
