[meteorite-list] Is there room for a meteorite question ?
From: Howard Wu <freewu2000_at_meteoritecentral.com>
Date: Thu Apr 22 10:17:44 2004 Message-ID: <20031211205509.73925.qmail_at_web60002.mail.yahoo.com> --0-320687799-1071176109=:70629 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Almost all materials shink when freezing. Water and gallium are the only excepts I know. Both have abnormal melting/freezing pts as well. Howard Wu Kevin Fly Hill <khill_at_cpsmedical.com> wrote: Question: When water turns to ice the change to a crystal structure expands the volume (decreases density). Does this density/expansion change also occur with the development of taenite/kamacite lattices? ie. at the same temperature is the density of an iron meteorite match the density of a "terrestrial" matching mixture that is "noncrystalline"? Guess you could melt down one of your irons and compare? Fly Hill > ----- Original Message ----- > From: "mark ford" > To: > Sent: Tuesday, December 09, 2003 8:41 AM > Subject: RE: [meteorite-list] Is there room for a meteorite question ? > > > > > > > > > > > > > > On the same note, thermal expansion... > > > > Presumably as the core solidifies (cools down) it would contract, would > > it not?, what effect would that have on the crystalline structure > > (widmanstatten) would there be a gradual stress/distortion in the > > taenite/kamacite boundries ? > > > > > > I guess as the core is such a big mass, any significant thermal > > contraction distortion would hardly be noticeable in a small hand > > specimen but I would imagine the thermal contraction in something the > > size of a large planetary body would be massive. > > > > > > > > Mark Ford > > > > > > > > > > -------------------------------------------------------------------------- > -- > > The information contained in this email may be commercially sensitive > and/or > > legally privileged. It is intended solely for the person(s) to whom it is > > addressed. If you are not a named recipient, you are on notice of its > status. > > Please notify the sender immediately by reply e-mail and then delete this > > message from your system. You must not disclose it to any other person, > > copy or distribute it or use it for any purpose. > > > > ______________________________________________ > > Meteorite-list mailing list > > Meteorite-list_at_meteoritecentral.com > > http://www.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ Meteorite-list mailing list Meteorite-list_at_meteoritecentral.com http://www.pairlist.net/mailman/listinfo/meteorite-list --------------------------------- BT Yahoo! Broadband - Save £80 when you order online today. Hurry! Offer ends 21st December 2003. The way the internet was meant to be. --0-320687799-1071176109=:70629 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit <DIV>Almost all materials shink when freezing. Water and gallium are the only excepts I know. Both have abnormal melting/freezing pts as well.</DIV> <DIV> </DIV> <DIV>Howard Wu<BR><BR><B><I>Kevin Fly Hill <khill_at_cpsmedical.com></I></B> wrote:</DIV> <BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"><BR><BR>Question: When water turns to ice the change to a crystal structure<BR>expands the volume (decreases density). Does this density/expansion change<BR>also occur with the development of taenite/kamacite<BR>lattices? ie. at the same temperature is the density of an iron meteorite<BR>match the density of a "terrestrial" matching mixture that is<BR>"noncrystalline"? Guess you could melt down one of your irons and compare?<BR><BR>Fly Hill<BR><BR>> ----- Original Message ----- <BR>> From: "mark ford" <MARKF_at_SSL.GB.COM><BR>> To: <METEORITE-LIST@METEORITECENTRAL.COM><BR>> Sent: Tuesday, December 09, 2003 8:41 AM<BR>> Subject: RE: [meteorite-list] Is there room for a meteorite question ?<BR>><BR>><BR>> ><BR>> ><BR>> ><BR>> ><BR>> ><BR>> > On the same note, thermal expansion...<BR>> ><BR>> > Presumably as the core solidifies (cools down) it would contract, would<BR>> > it not?, what effect would that have on the crystalline structure<BR>> > (widmanstatten) would there be a gradual stress/distortion in the<BR>> > taenite/kamacite boundries ?<BR>> ><BR>> ><BR>> > I guess as the core is such a big mass, any significant thermal<BR>> > contraction distortion would hardly be noticeable in a small hand<BR>> > specimen but I would imagine the thermal contraction in something the<BR>> > size of a large planetary body would be massive.<BR>> ><BR>> ><BR>> ><BR>> > Mark Ford<BR>> ><BR>> ><BR>> ><BR>> ><BR>><BR>> --------------------------------------------------------------------------<BR>> --<BR>> > The information contained in this email may be commercially sensitive<BR>> and/or<BR>> > legally privileged. It is intended solely for the person(s) to whom it<BR>is<BR>> > addressed. If you are not a named recipient, you are on notice of its<BR>> status.<BR>> > Please notify the sender immediately by reply e-mail and then delete<BR>this<BR>> > message from your system. You must not disclose it to any other person,<BR>> > copy or distribute it or use it for any purpose.<BR>> ><BR>> > ______________________________________________<BR>> > Meteorite-list mailing list<BR>> > Meteorite-list_at_meteoritecentral.com<BR>> > http://www.pairlist.net/mailman/listinfo/meteorite-list<BR>><BR><BR><BR><BR>______________________________________________<BR>Meteorite-list mailing list<BR>Meteorite-list@meteoritecentral.com<BR>http://www.pairlist.net/mailman/listinfo/meteorite-list</BLOCKQUOTE><p><hr size=1><font face="Arial" size="2"> <a href="http://uk.rd.yahoo.com/evt=21064/*http://btyahoo.yahoo.co.uk "><b> BT Yahoo! Broadband</b></a> - Save £80 when you order online today. Hurry! Offer ends 21st December 2003. The way the internet was meant to be. </font> --0-320687799-1071176109=:70629-- Received on Thu 11 Dec 2003 03:55:09 PM PST |
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