from The Meteoritical Bulletin, No. 110
Northwest Africa 13899 (NWA 13899)
Lunar meteorite (fragmental breccia)
History: In 2019 at the mineral show in Beijing Ziyao Wang discovered on the bottom of a box with ordinary chondrites from northwest Africa some small strange stones. This one he donated to Rainer Bartoschewitz.
Physical characteristics: 5.5 g gray grooved irregular fragment with orange soil adhersions. Gray cut face with white inclusions and few metallic specks.
Petrography: (R. Bartoschewitz, Bart) Polymict fragmental breccia of dominately mafic lithic clasts (gabbro, dunite) with accessoric chromite, silica, kamacite and taenite, minor anorthosite clasts (frequently transformed to maskelynite), and mineral fragments.
Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa20.4-41.9 (Fe/Mn 65-118; n=4); fayalite Fa85.0 (n=1); augite En28-50Fs55-14Wo18-35 (Fe/Mn 47-74; n=4); anorthite An94.2-97.4Or<0.5 (n=7); chromite CRAL=62, FFM=68 (n=1). Ilmenite MgO=4.5 wt% (n=1); kamacite Ni=2.9-6.7, Co=1.5-0.5wt% (n=5). Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10-9 m3/kg) = 4.10.
Classification: lunar meteorite (fragmental breccia).
Specimens: 1.24 g on deposit at IfP, main mass with Bart. Polished thin sections with Bart + IfP.
I have not studied Northwest Africa 13899.
Meteoritical Bulletin Database