Bowlesite
Bowlesite is an IMA-recognized mineral species in the sulfide class, with the chemical formula PtSnS.
It crystallizes in the orthorhombic crystal system (space group Pca2_1). It is a member of the Cobaltite structural group.
Key properties: specific gravity 10.06; Metallic luster.
IMA symbol Bwl, IMA status: approved, named in 2019.
Probably by low-T exsolution of Pt-Sn phases from high-T sulfides crystallized from a sulfide melt in a layered, mafic-ultramafic intrusion.
It is found associated with Chalcopyrite, pyrrhotite, pentlandite, moncheite, plagioclase, pyroxene, serpentine- subgroup, amphibole-supergroup minerals.
The mineral was named to honor Dr. John Frederick William Bowles (b. 1941), Manchester University, United Kingdom, for contributions to ore mineralogy and mineral deposits in mafic-ultramafic rocks.