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Yamato 981668
Basic information Name: Yamato 981668
     This is an OFFICIAL meteorite name.
Abbreviation: Y-981668
Observed fall: No
Year found: 1998
Country: Antarctica [Collected by National Institute of Polar Research, Japan]
Mass:help 20.7 g
Classification
  history:
NIPR Newsletter:  MN 20  (2011)  Eucrite
Meteoritical Bulletin:  MB 99  (2011)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 513 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 May 2011
Writeuphelp
Writeup from MN J20:
Y981668
Eucrite

Pairing: Y981672, 981673, 981724, 981734, 981735, 981737, 981738, 981739, 981740, 981741, 981742, 981743

The coarse-grained areas of these sections are texturally similar to Y980433. The sections of Y981737 (,41-1) and 981741(,31-1) have areas of dark impact melt matrix. Crystalline area of these meteorites shows a coarse-grained and fine-grained portion with broad boundaries. Pyroxene is inverted pigeonite in which orthopyroxene has thick lamellae and blebs of augite. Minor oxide minerals occur sparsely. These meteorites are moderately shocked. Compositions of Low-Ca pyroxene are Wo1.6-2.0Fs47-48 and Wo42.3-44.6Fs19.2-20.8 (wt. FeO/MnO = ~33), and those of plagioclase are An87-88.
Data from:
  MB99
  Table 0
  Line 0:
Date:1998
Mass (g):20.71
Pieces:1
Class:Eucrite
Ferrosilite (mol%):48.3 (46.2-50.5)
Classifier:A. Yamaguchi
Type spec mass (g):20.71
Type spec location:NIPR
Main mass:NIPR
Comments:Paired with Y980433
Institutions
   and collections
NIPR: Antarctic Meteorite Research Center, National Institute of Polar Research, 10-3 Midori-cho, Tachikawa, Tokyo 190-8518, Japan; Website (institutional address; updated 9 Dec 2013)
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Search for this meteorite in the NIPR database (Japan):   
References: Published in Meteorite newsletter : Japanese collection of Antarctic meteorites /Meteorite newsletter : Japanese collection of Antarctic meteorites ,20,1-19 (2011-03)
Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 40849 approved meteorites from Antarctica (plus 4494 unapproved names)

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