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Northwest Africa 13596
Basic information Name: Northwest Africa 13596
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13596
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 90 g
Recommended:  H3    [explanation]

This is 1 of 694 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 16 Jan 2021
Writeup from MB 110:

Northwest Africa 13596 (NWA 13596)

(Northwest Africa)

Purchased: 2018 Oct

Classification: Ordinary chondrite (H3)

History: A single stone weighing 90 g was found by an anonymous finder in Western Sahara and purchased in October 2018 at the Turin Fair by Mario Di Martino.

Physical characteristics: The main mass is completely covered by a dark-brown fusion crust.

Petrography: (V.Moggi Cecchi, G.Pratesi, S.Caporali UniFi): The thin section displays a chondritic texture, with various chondrule types (PO, POP and RP) set in a fine grained matrix and ranging from 400 to 1200 μm. PO chondrules display zoned olivine crystals. POP chondrules display olivine grains and elongated pyroxene grains. Olivine is inhomogenesous and Mg-rich in chondrules, while Fe-rich in the matrix. Orthopyroxene in chondrules is inhomogeneous, with a core-rim variability. Iron oxides, Fe-Ni alloys and troilite are the main opaque phases and can be found as individual grains scattared in the matrix or rimming chondrules.

Geochemistry: EMP (V.Moggi Cecchi, G.Pratesi, S.Caporali UniFi); Olivine in both chondrules and matrix (Fa17.5±7.9Fo82.5±7.7; n=; Fe/Mn = 45.6±28.4); low-Ca pyroxene in both chondrules and matrix (Fs12.0±5.5En87.1±5.4Wo0.9±0.4; n=65; Fe/Mn = 17.5±11.3);

Classification: Ordinary Chondrite (H3); S3; W3, estimated subtype 3.5 based on Fa and Fs values and standard deviations.

Specimens: The main mass, weighing 90 g, is own by Mario Di Martino; the type specimen, weighing 18.1 g, and one thin section are on deposit at MSN-FI (Inventory # I-3569).

Data from:
  Table 0
  Line 0:
Place of purchase:Turin Mineral Show
Date:P 2018 Oct
Mass (g):90
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):17.5±7.9 (N=92)
Ferrosilite (mol%):12.0±5.5 (N=49)
Wollastonite (mol%):0.9±0.4
Classifier:V. Moggi Cecchi, MSN-FI
Type spec mass (g):18.04
Type spec location:MSN-FI
Main mass:Di Martino
Comments:Field MDM18_18;Inv.I-3569; submitted by Vanni Moggi Cecchi
   and collections
MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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