On Offer: 0.38g Angrite NWA 10646 - Achondrite. This is an exceptionally rare angrite with a very low total known weight (TKW) of only 14 grams.

Official name: Northwest Africa 10646

Abbreviation: NWA 10646 

Type: Angrite

TKW: 14g

Origin: Morocco

Year found: 2016

Description: One of only a few remaining specimens of this rare achondrite available to collectors and researchers. At 0.38 grams, this fragment of NWA 10646 is sufficient for SIMS, XRD, ICP-MS, Atom Probe Tomography and other analysis techniques, or as a rare addition to any discerning meteorite collection. 

New APB Research: A recent study led by our colleague Aaron S. Bell (University of Colorado Boulder) provides the first direct petrological evidence that the Angrite Parent Body (APB) was not a small, Vesta-like asteroid, but a massive protoplanet with a radius ranging between 1,000 km to over 1,800 km. This means it was comparable in size to Pluto, Earth's Moon, or possibly even approaching the size of Mars.

What you get: 0.38g NWA10646 Angrite meteorite specimen as shown, membrane storage/display box, and Certificate of Authenticity.

We offer a 100% no questions asked 30 day return policy.  



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Northwest Africa 10646
Basic information

Name: Northwest Africa 10646
     This is an OFFICIAL meteorite name.

Abbreviation: NWA 10646

Observed fall: No

Year found: 2016

Country: (Northwest Africa)

Mass: 14 g
Classification
  history:
Recommended:   Angrite             

This is 1 of 28 approved meteorites classified as Angrite.  
Comments: Approved 15 May 2016
Writeup
Writeup from MB 105: 

Northwest Africa 10646 (NWA 10646)

(Northwest Africa)

Purchased: 2016

Classification: Angrite

History: Purchased by Dustin Dickens, February 2016, from a Moroccan dealer.

Physical characteristics: Single piece, some fine desert soil on surface, partial fresh fusion crust. Broken surfaces show a fresh polycrystalline aggregate of mm-sized green, yellow, and black minerals. Friable.

Petrography: (C. Agee, UNM) This meteorite has a granular texture of fassaite (~50%) and olivine (~30%) up to ~1 mm, with stubby plagioclase laths (~15%) up to 300 μm. Some olivines have exsolved kirschsteinite. Accessory titanium-iron oxides and troilite were observed.

Geochemistry: (C. Agee and M. Spilde, UNM) Fassaite Fs17.0±7.1Wo52.7±1.3, range: Fs12.0-29.6, Fe/Mn=88±16, Al2O3 (wt%)=7.6±1.6, TiO2 (wt%)=1.6±0.9, n=6; olivine Fa55.4±13.7Lrn3.5±1.6, range Fa28.7-78.6, Fe/Mn=87±6, n=8; kirschsteinite Fa49.7Lrn45.8, Fe/Mn=81, n=1; plagioclase An99.4±0.1, n=5.

Classification: Angrite based on Fe/Mn, and presence of fassaite, kirschsteinite, and nearly pure anorthite. Paired with NWA 10463.

Specimens: 2.9 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.
Data from:
  MB105
  Table 0
  Line 0:
Place of purchase: Morocco
Date: P 2016
Mass (g): 14
Pieces: 1
Class: Angrite
Shock stage: low
Weathering grade: low
Fayalite (mol%): 55.4±13.7
Ferrosilite (mol%): 17.0±7.1
Wollastonite (mol%): 52.7±1.3
Classifier: C. Agee, UNM
Type spec mass (g): 2.9
Type spec location: UNM
Main mass: Dustin Dickens
Comments: Field name TMS-2; submitted by C. Agee, UNM
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)