2.45g EL6 Enstatite Chondrite Meteorite I NWA 7401

  On Offer: 2.45g gram EL6 - Enstatite Chondrite end piece I NWA 7401 Type: Enstatite chondrite -  EL6 Origin: Morocco Official name: NWA 7401 Description: One of the early Northwest African classifications, this is an exceptional 2.45 gram EL6 meteorite end piece. The EL and EH chondrites are a unique group of chondritic meteorites with compositions dominated by orthopyroxene (enstatite) rather than olivine and more Ca rich pyroxenes. Enstatite is a pyroxene with a very low amount of calcium compared to other types of pyroxene, and often displays large well delineated grains. What you get: 2.45g NWA 7401 EL6 Meteorite specimen as shown, membrane storage/display box, & signed Certificate of Authenticity. I offer a 100% no questions asked 30 day return policy. SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW Northwest Africa 7401 Basic information Name: Northwest Africa 7401     This is an OFFICIAL meteorite name.Abbreviation: NWA 7401 Observed fall: NoYear found: 2012Country: Morocco Mass: 996 g Classification  history: Meteoritical Bulletin: MB 101   (2013)   EL6 Recommended:   EL6     This is 1 of 104 approved meteorites classified as EL6.   [show all]Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites Comments: Approved 12 Oct 2012 Writeup Writeup from MB 101:  Northwest Africa 7401 (NWA 7401) Morocco Purchased: May 2012 Classification: Enstatite chondrite (EL6) History: Purchased by Sean Tutorow in Morocco, May 2012. Physical characteristics: 150 matched stones found together, weathered exterior, saw cut reveals light-gray, very fine grained texture, a few scattered light-colored chondrules, numerous small voids, friable. Petrography: (C. Agee, UNM) SEM examination of a saw cut surface shows a distinct 3 mm radial pyroxene chondrule set in a matrix dominated by orthopyroxene, with accessory plagioclase. Plagioclase to 300 μm. No other chondrules with discernable outlines observed in the section. Matrix pyroxenes to ~100 microns; chondrule pyroxenes mostly elongate prisms to ~1 mm. Ubiquitous daubreelite, Si-bearing kamacite, and taenite. Minor schreibersite and K-rich sulfide (possibly djerfisherite). Some oxide and sulfate weathering products present on grain boundaries. Geochemistry: (C. Agee and M. Spilde, UNM) Enstatite Fs0.6Wo3.4; plagioclase Or6.8Ab71.1An22.0; kamacite Si=1.16, Ni=5.05 (wt%). Classification: Enstatite chondrite (EL6), EL based on Si content of kamacite, type 6 based on absence of significant glass or olivine in the single analyzed chondrule and large plagioclase grains. This meteorite shares some textural similarities with Al Haggounia 001, although its plagioclase composition is significantly higher in An. Specimens: 39.53 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass. Data from:  MB101  Table 0  Line 0: Place of purchase: Morocco Date: P May 2012 Mass (g): 995.59 Pieces: 150 Class: EL6 Ferrosilite (mol%): 0.6 Wollastonite (mol%): 3.4 Classifier: C. Agee, UNM Type spec mass (g): 39.53 Type spec location: UNM Main mass: Sean Tutorow Comments: Submitted by C. Agee 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)