Thought it would be best to do a little checking:
WIKIPEDIA....
Almost all common metals, and many ceramics are polycrystalline. The
crystallites are often referred to as grains. Powder grains can
themselves be composed of smaller polycrystalline grains.
A crystallite is a domain of solid-state matter that has the same
structure as a single crystal. Metallurgists often refer to
crystallites as "grains".
Solid objects that are large enough to see and handle are rarely
composed of a single crystal, except for a few cases (gems, silicon
single crystals for the electronics industry, certain types of fiber,
and single crystals of a nickel-based superalloy for turbojet
engines). Most materials are polycrystalline; they are made of a large
number of single crystals — crystallites — held together by thin
layers of amorphous solid. The crystallite size can vary from a few
nanometers to several millimeters.
Begin forwarded message:
From: Darryl Pitt <[email protected]>
Date: January 26, 2009 8:00:04 PM EST
To: Jerry Flaherty <[email protected]>
Cc: Meteorite List <[email protected]>
Subject: Re: [meteorite-list] Rocks from Space Picture of the Day -
January 26, 2009
Yes, quite right, the entire mass of many an iron meteorite is a
portion of a broken or fragmented crystal.
This is a (so cool) naturally faceted fragment that broke along
crystalline planes.
d,
On Jan 26, 2009, at 6:07 PM, Jerry Flaherty wrote:
Why the word "crystal"?
----- Original Message ----- From: "Michael Johnson" <[email protected]
>
To: "Meteorite List" <[email protected]>
Sent: Sunday, January 25, 2009 11:26 PM
Subject: [meteorite-list] Rocks from Space Picture of the Day -
January 26, 2009
RSPOD:
http://www.rocksfromspace.org/January_26_2009.html
January 2009 Calendar:
http://rocksfromspace.org/January_2009.html
______________________________________________
http://www.meteoritecentral.com
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
______________________________________________
http://www.meteoritecentral.com
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
______________________________________________
http://www.meteoritecentral.com
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
______________________________________________
http://www.meteoritecentral.com
Meteorite-list mailing list
[email protected]
http://six.pairlist.net/mailman/listinfo/meteorite-list
