Table 2 Summary of mineralogic properties of the adhering grains

Fig. 4a (left grain)

RB-DQ04-0062 (Naoko)

Chromite

750 × 320 nm

No

Host olivine and the chromite are a lithic fragment

Fig. 4a (right grain)

RB-DQ04-0062 (Naoko)

Aggregate of glassy Si-rich material and troilite

380 × 215 nm

No

Itokawa-like material

Fig. 4b

RB-DQ04-0091 (Mizuki)

SiO₂ glass

1.5 × 0.4 μm

Yes

Porous grain

Fig. 4c (left grain)

RB-DQ04-0091 (Mizuki)

Low-Ca pyroxene (En₇₃)

350 × 150 nm

No

Itokawa-like material

Fig. 4c (right grain)

RB-DQ04-0091 (Mizuki)

Carbon

~110 nm

No

Contamination?

Fig. 4d

RB-DQ04-0091 (Mizuki)

Phosphate

1 × 0.4 μm

Yes

Likely ejecta from a micrometeoroid impact

Fig. 4e (left grain)

RB-DQ04-0062 (Naoko)

Olivine (Fa₂₁)

900 × 340 nm

Yes

Planar crystallographic deformation features

Fig. 4e (middle grain)

RB-DQ04-0062 (Naoko)

Aggregate of Fe metal and S-rich material

~300 nm in length

Yes

Lack of Ni in the Fe metal grain

Fig. 4e (right grain)

RB-DQ04-0062 (Naoko)

Glassy SiO₂ with variable amounts of FeO and MgO (see Table 1)

~340 nm in length

Yes

Porous grain. Beam damage at the contact with the host grain

Fig. 4f

RB-DQ04-0091 (Mizuki)

Plagioclase (An₁₂Ab₆₂)

1.5 × 1 μm

No

Itokawa-like material