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Miller Range 090206
Basic information Name: Miller Range 090206
     This is an OFFICIAL meteorite name.
Abbreviation: MIL 090206
Observed fall: No
Year found: 2009
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 17 g
Antarctic Meteorite Newsletter:  AMN 34(2)  (2011)  Ureilite
AMN 35(2)  (2012)  Achondrite-ung
Meteoritical Bulletin:  MB 101  (2012)  Achondrite-ung
MB 100  (2012)  Achondrite-ungĀ 
Recommended:  Achondrite-ung    [explanation]

This is 1 of 119 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Field number: 20809
Approved 10 Sep 2011
Revised 4 Sep 2012: Reclassified in AMN 35(2)
Writeup from AMN 34(2):
Sample Number MIL 090206
Newsletter 34,2
Location Miller Range
Field Number 20809
Dimensions 3.3 x 2.3 x 1.8
Weight 16.994
Original Classification Ureilite
Macroscopic Description - William Satterwhite
40% of the exterior has dark, shiny, rusty brown fusion crust. The interior has abundant metal in a brown/black rusty matrix.
Thin Section (,2) Description - Cari Corrigan, Linda Welzenbach and Nicole Lunning
This section consists of an aggregate of equigranular (up to 1-2 mm) grains. Individual olivine grains are rimmed by carbon-rich material containing grains of metal. Weathering is pervasive. Olivine has cores of Fa26-28. Pyroxene grains are up to 1 mm and have compositions of Fs26Wo2. This meteorite is a ureilite.
Antarctic Meteorite Images for Sample MIL 090206
Lab Group Photo of Sample MIL 090206Showing North View 

Writeup from AMN 35(2):

Four previously announced MIL samples that have been classified as "ureilite" (MIL 090340, 090356, 090206, 090805), are being reclassified here to "ungrouped achondrite". They are all very similar to two additional samples — MIL 090963 and MIL 090405 — and may instead represent 6 meteorites that are related to brachinites, based on Ca and Cr content of the olivines, O isotopes, and grain boundary mineralogy (e.g., Warren and Rubin, 2012, LPSC abstract #2528; Goodrich et al., 2012, MetSoc abstract #5272). Although these meteorites may be related to brachinites, they are not true brachinites and so the classification "ungrouped achondrite" will be used until a further change is necessary. We specifically want to call attention to the fact that they are not ureilites so that researchers will not mistakenly request them as such. Concomitantly, we feel that researchers who are interested in brachinites may find these samples of interest and may not have noticed them previously due to the ureilite classification.
Data from:
  Table 1
  Line 598:
Mass (g):17
Weathering grade:B
Fayalite (mol%):26-28
Ferrosilite (mol%):26
Type spec mass (g):17
Type spec location:JSC
Main mass:JSC
Comments:Submitted by AMN
   and collections
JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022)
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 34(2) (2011), JSC, Houston
Published in Antarctic Meteorite Newsletter 35(2) (2012), JSC, Houston
Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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     Recommended::   (83° 24' 16"S, 156° 45' 22"E)

     This is 1 of 43500 approved meteorites from Antarctica (plus 3802 unapproved names)
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