Northwest Africa 13687 (NWA 13687) (Northwest Africa) Purchased: 2021 Jan Classification: HED achondrite (Diogenite) History: The meteorite was purchased from a dealer in Temara, Morocco. Physical characteristics: Many brownish fragments without fusion crust. Petrography: The meteorite is a monomict achondritic breccia predominantly composed of up to 3 mm sized orthopyroxene crystals set into fine-grained clastic matrix. Orthopyroxenes contain Ca-pyroxene inclusions with very fine exsolution lamellae. Myrmekitic silica-chromite intergrowth are present at the opx-cpx grain boundaries. Minor phases are silica, chromite, FeS, and metallic Fe. No feldspar has been detected in the thin section studied. The meteorite contains calcite-filled cracks. Geochemistry: low-Ca pyroxene: Fs30.1±0.3Wo4.1±0.3 (Fs29.7-30.8Wo3.2-4.3, FeO/MnO=25-28, n=7); Ca-pyroxene: Fs13.9±0.2Wo42.0±0.9 (Fs13.5-14.3Wo40.2-43.1, FeO/MnO=18-20, n=7) Data from: MB110 Table 0 Line 0: Place of purchase: Temara, Morocco Date: P 2021 Jan Mass (g): 700 Pieces: many Class: Diogenite Shock stage: low Weathering grade: moderate Ferrosilite (mol%): 30.1; 13.9 Wollastonite (mol%): 4.1; 42.0 Magnetic suscept.: 3.05 Classifier: A. Greshake, MNB Type spec mass (g): 23.2 Type spec location: MNB Main mass: Said Yousfi Comments: Submitted by Ansgar Greshake Institutions and collections MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) Catalogs: 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 Find references in NASA ADS: NASA ADS Find references in Google Scholar: Google Scholar Photos: Credit Photos Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability) Said Yousfi Added to database 8 Oct 2023 Geography: Coordinates: Unknown. Statistics: This is 1 of 9559 approved meteorites from (Northwest Africa) (plus 1872 unapproved names) Also see: This lists the most popular meteorites among people who looked up this meteorite. Revision history: This lists important revisions made to data for this record.