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Re: Moonquakes

Subject: Re: Moonquakes
From: Jonathan Silverlight
Date: Thu, 16 Mar 2006 18:58:20 +0000
Newsgroups: sci.astro, alt.sci.planetary, sci.geo.earthquakes
In message <1142530483.939961.41090@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, John Curtis <john@xxxxxxxxx> writes

Fresh olivine is formed at deep ocean volcanos and at dying stars,
where water is the dominant compound.
http://www.edpsciences.org/articles/aa/pdf/2001/34/aade292.pdf?access=ok
Since lunar olivine is not presolar, in situ formation is an
alternative.
Silicates relinquish water while still in acid form, H4SiO4,
but once converted into salts, such as olivine (Fe or Mg)2SiO4
or Zircon,  ZrSiO4,  they become impervious to desiccation
by heat or vacuum. John Curtis


But the water in stellar atmospheres is effectively in the form of superheated steam (>1500 K), except that it's in the form of a very good vacuum (column density less than 2 x 10^18 molecules cm^-2).

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