TEM BF images and SAED patterns of crystalline nanoparticles in condensates; gupeiite (Fe₃Si), niningerite (MgS), γ-iron (Fe), and FeS phase. SAED patterns were taken from the circled region. (a) Type-E grains with gupeiite and niningerite on the amorphous silicate from Rad-75H, shown in Fig. 5d. Gupeiite and niningerite are highly crystalline and show conformity in crystal orientation, which is indexed in the SAED pattern with G and N, respectively. (b) Type-A grain with γ-iron particle in the amorphous silicate from Rad-75L. (c) Type-C grain with FeS particle on the amorphous silicate from Rad-100. The phase of FeS was undistinguishable because of its low crystalline and low continuity nature.