[meteorite-list] Water in space

From: Tom Knudson <peregrineflier_at_meteoritecentral.com>
Date: Tue May 31 16:22:09 2005
Message-ID: <00f001c5661e$686e0560$2d107918_at_Michelle>

Okay, there is water in space.
"CI carbonaceous chondrites ... contain the highest percentage of water
- 20 percent - of any carbonaceous meteorite. When heated in a closed
container, the water is easily driven off and condenses on the side of
the enclosing vessel."

Next logical question, how could a meteorite be on earth more than a day or
two and not have it's water evaporated? Then, how does it not soak up
terrestrial moisture?
   I once cut an Allende and soaked it in Alcohol. When I took it out of
the alcohol, I let it air dry for a few minutes and then I weighed the
slices, recorded the weights and put them under the heat lamp. A few days
later, I was sorting out the slices by weight and freaked out, all my
weights were off by a tenth of a gram. I figured out the missing weight was
the alcohol. To test it, I resoaked a slice and got the original weight and
weighed it over the next few hours and it returned to it's lesser weight.
  So I concluded, Allendes make great sponges and I make sure they are dry
before weighing them.
  It sure makes me wonder how they could keep space water in them if they
were not picked up immediately after the fall?


Thanks, Tom
peregrineflier <><

----- Original Message -----
From: <bernd.pauli_at_paulinet.de>
To: <Meteorite-list_at_meteoritecentral.com>
Sent: Tuesday, May 31, 2005 1:04 PM
Subject: [meteorite-list] Water in space


> Bernd wrote:
>
> > "extensive aqueous alteration on the R parent body"
>
> Tom responded:
>
> > Water in space? That sounds like a whole new subject! : )
>
>
> Hello Tom, Doug, and List,
>
> NORTON O.R. (1998) RFS II, p. 193):
>
> "CI carbonaceous chondrites ... contain the highest percentage of water
> - 20 percent - of any carbonaceous meteorite. When heated in a closed
> container, the water is easily driven off and condenses on the side of
> the enclosing vessel."
>
> Tagish Lake probably contains an even higher amount of water
> (of asteroidal water).
>
> Best wishes,
>
> Bernd
>
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Received on Tue 31 May 2005 04:22:02 PM PDT