[meteorite-list] Sikhote Alin Meteorite Stolen from the University of New Mexico

[MexicoDoug]

Hi guys

I think this is true, but really don't know if there is some more 
subtile catch like some completely arbitrary distance someone measured 
somewhere:

In the conditons of formation, even though Sikhote is classified as an 
octahedrite, most of the small specimens do not exhibit patterns and 
are just small chunks of a single kamacite crystals, right?  So 
whatever the main mass is called, really doesn't matter - these smaller 
ones are chemically hexahedrites.  Because all a hexahedrite is  - is a 
fragment of a kamacite crystal.

In fact, some "hexahedrites" between 5-6% nickel are probably 
"octahedrites" even by the TKW accounting method, only, the interface 
wasn't discovered during classification.  Similar to the siderite vs. 
pallasite discoveries of late.

(In the case of the larger specimen that was labeled, probably it is 
larfe enough to contain a crystal interface, so best to call it as 
mentioned coarsest octahedrite.)

kindest wishes
Doug
(surviving the change of year, but barely!)



-----Original Message-----
From: Bernd V. Pauli <bernd.pauli at paulinet.de>
To: Meteorite-list <Meteorite-list at meteoritecentral.com>
Sent: Mon, Jan 2, 2012 11:06 am
Subject: [meteorite-list] Sikhote Alin Meteorite Stolen from the 
University of New Mexico


Martin kindly wrote:

"Bernd, you wrote this almost 4 years ago: Eduardo
 wrote:...a Sikhote Alin...labeled as Hexahedrite."

... which clearly demonstrates the Internet doesn't
forget but I do ;-)

Cheers,

Bernd


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