Acfer 3xx (BB 215) : UREILITE © Meteoriteshow

Official : Acfer 360 Date of find : November 17, 2002 Total mass : 68 g # of fragments : 1 single fragment Place : Acfer (Algeria) Classification : ENS Lyon Meteoritical Bulletin n°89 (September 2005) Type : MONOMICT UREILITE Weathering grade : W1 %Fa : 17.21% (range 5.8-25.0%) %Fs : 16.5% (range 7.0-18.8%) Remarks (ENS) : Monomict rock with a coarse-grained (mm) equilibrated texture typical of ureilites, triple junctions and curved intergranular boundaries are observed. The primary mineral composition is olivine (Fo83) 90 %, pigeonite (En75Wo8) 8% and interstitial carbonaceous material 2%. Olivine often contains metal inclusions and pigeonite sometimes includes rounded olivine grains. Metal rims are present along silicate grains. Flakes of dark carbonaceous material consist on diamonds as a small grains within graphite as revealed by Raman spectroscopy. Weathering grade appears to be minor.		on site picture, November 17, 2002
full piece before cutting : no fusion crust		détailed picture of the surface, showing green cristals of OPX (after analysis by Raman laser)
cut section showing details of the structure		fractured surface, showing cristals