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.
Since lunar olivine is not presolar, in situ formation is an
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).