STEPHEN A. SKIRIUS / SCIENCE PHOTO LIBRARY STEPHEN A. SKIRIUS / SCIENCE PHOTO LIBRARY
Polarised light micrograph of crystals of a mixture of the explosives ammonium nitrate and TNT (trinitrotoluene). Preparations such as this are used to identify components in home-made bombs from the residue left at the scene of the explosion. Magnification: x100 at 35mm size.
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