pallasite

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pallasite

(pal -ă-sÿt) See stony-iron meteorite.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Pallasite

 

a rare stony-iron meteorite, named after the first extant meteorite of this type, Pallas iron, discovered in Siberia by the schoolteacher Medvedev and brought to St. Petersburg on the instructions of P. S. Pallas in 1772. Pallasites are composed of approximately equal quantities of nickel iron and olivine. The unique pallasite structure indicates that these meteorites were formed during the absence of gravitational force, or at least of significant gravitational force.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

pallasite

[′pal·ə‚sīt]
(geology)
A stony-iron meteorite composed essentially of large single glassy crystals of olivine embedded in a network of nickel-iron.
An ultramafic rock, of either meteoric or terrestrial origin, which contains more than 60% iron in the former, or more iron oxides than silica in the latter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Then in 1863 the work of the German mineralogist Gustav Rose established the class of stony-iron meteorites called pallasites, the subclasses of which have varying amounts of iron, nickel, and olivine.
The olivine and nickel components virtually duplicated those found in all the other then-known pallasites.
It describes a giant 10-ton object -- a rare pallasite (stony-iron) meteorite -- allegedly found in 1856 by John Evans, a contract explorer for the U.S.
How could a scientist of his presumed caliber discover an exotic 10-ton pallasite and not record it in his journal?
Sometimes irons are laced with silicate minerals, resulting in attractive (and valuable) specimens called mesosiderites or pallasites.