Thursday, November 1, 2007

Volcano Smoke Particle

The particle in this scanning electron microscope image is approximately 8 micrometers (0.008 mm) in diameter. The outer shell is rich in silicon and aluminum. The inner portion contains more magnesium and iron. The small raised areas on the surface are titanium-aluminum-iron-rich crystals of a mineral called spinel. The holes in the background are part of the filter paper that the particle was collected on.

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