FIG. 8. Pt-Ir-(K)-chlorocompounds. (a) NHMV. Fe-hydroxide particle showing blistered parts to the right, and a metallic dusting (white). Hand mt. SEM(BS). 400 µm. (b) NHMV. Enlargement of Fig. 8a, showing a particle of Pt-K-Cl (white) and an incrusted lamella of iridium (left). Hand mt. SEM(BS). 35 µm. (c) NHMV. Surface of an altered chromite (dark grey), dusted with various chlorocompounds. SEM(BS). 130 µm. (d) NHMV. Enlargement of Fig. 8c. showing a concentration of fibrous Ir-chlorocompounds (white, elongate), and one crystal of Ca carbonate (upper bipyramidal prism). SEM(BS). 12 µm. (e) NHMV. Chromite crystal. Hand mnt. SEM(SM). 650 µm. (f) NHMV. Enlargement of Fig. 8e, showing a triangular hollow in the chromite with 3–4 crystals of K-chloroplatinate (light grey), and a heavy dusting of the surface by various Ru-Os-Ir-Pt-K-containing particles (white). SEM(BS). 50 µm. (g) NHMV. Enlargement of Fig. 8f, showing two Pt-K-Cl crystals with bipyramidal habit. SEM(BS). 10 µm.