Wikipedia picture of the day on November 23, 2017:
A high purity (99.999 %) rhenium single crystal made by the floating zone process, an ebeam remelted (99.995 %) rhenium bar and as well as a high purity (99.99 % = 4N) 1 cm3 rhenium cube for comparison.
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from Medical Release Form https://medicalreleaseform.tumblr.com/post/167800449668
via Medical release form
from Tumblr https://jeemiahmelville.tumblr.com/post/167800547392
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