Minakawaite
Minakawaite is an IMA-recognized mineral species in the sulfide class, with the chemical formula RhSb.
It crystallizes in the orthorhombic crystal system (space group Pnma). It is a member of the Modderite structural group.
Key properties: specific gravity 10.04; Metallic luster.
IMA symbol Mka, IMA status: approved, named in 2019.
Found in a platinum-group mineral (PGM) placer in a small stream crossing a clinopyroxenite body in serpentinite mélange.
It is found associated with Isoferroplatinum, cuprorhodsite, ferhodsite-like mineral, Rh(Ge, Cu, Fe) mineral, osmium, erlichmanite, laurite, bowieite, cuprorhodsite, tulameenite.
The mineral was named to honor Japanese mineralogist, Professor Tetsuo Minakawa (b. 1950) of Ehime University for his contributions to the descriptive mineralogy of Kyushu and Shikoku, Japan.