First Meteoritic Occurrence of Sidorovite (Fe3Pt) in the Smara 002 Carbonaceous Chondrite

Sidorovite Fe3Pt is a new mineral recently discovered in the Snegovaya River Placer, Koryak Highlands, Russia and appoved by the I.M.A. CNMNC [1,2]. It has been found associated to other PtFe alloys and PGM miner- als as inclusions within or as a rim on the main alloy phases [2]. Detailed analyses performed on the carbonaceous chondrite Smara 002, recently approved as a new meteorite by the Nomenclature Committee of the Meteoritical So- ciety allowed to enucleate the presence of a sidorovite grain as a metal nugget dispersed in the matrix. Smara 002 is a meteorite consisting of several fragments totally weighing 805 grams recovered by Bachikh Mouloud in 2021 dur- ing a meteorite search in the El-Aasli area, west of Es Smara, Morocco. A cut surface reveals large chondrules and large Calcium Aluminum Inclusions (CAIs) set in a dark, fine grained matrix [3]. The type specimen is deposited at the Museo di Storia Naturale-SMA of the University of Firenze, Italy (Inv. # I-3710)