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Iron-core meteorites display an awesome criss-cross pattern known as the Widmanstätten pattern, shown below:

Cross-section of an iron-core meteorite (photo by Dr. Patrick M. Len, taken from Wikipedia)

I TA for an intro-level astronomy/planetary science class, and today we discussed meteorites. A student asked me what the average length of these crystals is for iron meteorites, but I hesitated. The samples we had available (and the image above) made it look like the average length was on the order of a centimeter, but with great variation. I'm curious as to whether there is a more quantitative answer.

My question:

How long is the average length of a given linear crystal in a typical iron meteorite? How much variation is there from sample to sample?

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