[meteorite-list] bulk density testing

Michael Murray mikebevmurray at gmail.com
Thu Aug 12 12:56:25 EDT 2010


Hi List,
I want to be sure that I'm fully understanding the correct method to  
perform bulk density tests.  I'm attempting to follow the steps in the  
Field Guide to Meteors and Meteorites.  If someone would check me on  
this I would greatly appreciate it.

Here is what I have been doing...I'm using a Palmscale 8.0.  I'm  
weighing the specimen on the gram scale, then placing my little vial  
of water on there and after zeroing, I place the suspended specimen  
down in the water being sure not to touch the bottom.  Using those two  
figures, I have been dividing the specimen's weight by the weight of  
the specimen suspended in the water.  My most recent test gave me a  
1.3g weight on the specimen by itself.  Then a suspended weight  of . 
3.  If I figured it correctly with my division, that gives me a 4.33  
bulk density.  The little specimen was not porous.  Using this same  
procedure, I tested a different specimen, not related, and came up  
with a 4.555 result for it.  Comparing those weights to meteorite  
densities in the chart in the Field Guide, the results indicate stony  
irons.

It seems simple enough.  Am I close?

Mike in CO



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