[meteorite-list] Back to real meteorite subjects - iron inclusions ...crystals

From: Mr EMan <mstreman53_at_meteoritecentral.com>
Date: Fri, 18 Jan 2008 22:34:17 -0800 (PST)
Message-ID: <675758.43518.qm_at_web51001.mail.re2.yahoo.com>

 Just to jump on the "me too" bandwagon, I have a clean
pentagonal-shaped cavity in a small Gao I got from Al Lang 8 years ago.
 The cavity is at least 10mm across and as deep. I was hoping I could
keep going through Al's stash to find the missing "crystal" but nada.
The shape is distinctly "sided" as in a polyhedral crystal

Given a slight rounding of one side of the cavity this could have been
a hexagonal shaped missing object. At the time I suspected either an
olivine or iron crystal but discounted both as unlikely given this was
a common chondrite.

Given these reports now it might worth revisiting. Perhaps someone
would help me make a mold of the hold to see what the crystal faces
really looked like. I'll photograph it once it is unpacked.

Perhaps large complete crystals do find their way into
chondrites--however theoretically any large crystal would have grown
long after the chondrite accreted. Else, there were some large crystals
that survived the last solar system intact as the new solar system
cranked up only to be cocooned within common chondrites. If the later
scenario were true then these iron crystals should be as old or older
than CAIs.

Elton
Received on Sat 19 Jan 2008 01:34:17 AM PST