
In planetary science, volatiles are the group of chemical elements and chemical compounds with low boiling points that are associated with a planet`s or moon`s crust and/or atmosphere. Examples include nitrogen, water, carbon dioxide, ammonia, hydrogen, methane and sulfur dioxide. In astrogeology, these compounds, in their solid state, often com.....
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http://en.wikipedia.org/wiki/Volatiles

Chemical compounds that become gaseous at very low temperatures.
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http://planetfacts.org/space-terms/

Substances that are readily vapourised. ... (05 Dec 1998) ...
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http://www.encyclo.co.uk/local/20973

Materials, such as water and alcohol, in a sizing or resin formulation that can be vaporized at room or slightly elevated temperatures.
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http://www.komprex.com/Glossary/index.htm

That portion of a substance that is readily vaporized.
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https://www.emcoplastics.com/plastic-glossary-of-terms/
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