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Yamato 791186
Basic information Name: Yamato 791186
     This is an OFFICIAL meteorite name.
Abbreviation: Y-791186
Observed fall: No
Year found: 1979
Country: Antarctica [Collected by National Institute of Polar Research, Japan]
Mass:help 99.6 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  Eucrite-mmict
NIPR Catalogue:  2000 Edition  (2000)  Eucrite-mmict
MetBase:  v. 7.1  (2006)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 238 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from MN J7(1):

Y-791186, 72-1: Eucrite (monomict)

          This PTS shows a partially brecciated, coarse, subophitic texture and contains no mesostasis. The pyroxenes often display well developed herring-bone texture of twinning. They contain coarse augite exsolution lamellae up to 10 μm thick with (001) in common with the host low-Ca pyroxene, which is partly inverted to orthopyroxene. The pyroxene rims display finer and denser exsolution lamellae than the cores. The largest pyroxene crystal (partly inverted) reaches up to 2.3 x 0.9 mm in size. The plagioclase laths often include thin cores or tubes of pyroxene and reach up to 3.2 x 0.3 mm in size. Monomict eucrite similar to Y-792510.

Catalogs:
Search for this meteorite in the NIPR database (Japan):   
References: Published in Meteorites news : Japanese collection of Antarctic meteorites / Meteorites news : Japanese collection of Antarctic meteorites ,7(1),1-94 (1998-06)
Never published in the Meteoritical Bulletin
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (71° 30'S, 35° 40'E)
     Recommended::   (71° 30'S, 35° 40'E)

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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