Iridian tulameenite

Where it forms, where it's found

Geological setting: PGM and gold placers

1recorded occurrences

Source · OpenStreetMap

Physical

Colour: pinkish- to yellowish-grey metallic

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
78PtPlatinum Platinum 2 195.084 390.168
43.64%
77IrIridium Iridium 2 192.217 384.434
43.00%
29CuCopper Copper 1 63.546 63.546
7.11%
26FeIron Iron 1 55.845 55.845
6.25%
Total 893.993 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula
Impurities: Fe
Ni

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
78PtPlatinum	Platinum	2	195.084	390.168	43.64%
77IrIridium	Iridium	2	192.217	384.434	43.00%
29CuCopper	Copper	1	63.546	63.546	7.11%
26FeIron	Iron	1	55.845	55.845	6.25%
	Total	893.993	100.00%

Group, growth & confusion

2 minerals

ForsteriteMg₂(SiO₄)
Mineral
—
Native IridiumIr
Mineral
—

Literature, links & citation

Citations

—Pavel M. Kartashov (n.d.) analytical data.

Cite this entry

Entry last updated August 11, 2025

@misc{mineral2025,
  author    = {Mineral Index editorial board},
  title     = {Iridian tulameenite — Mineral Index},
  year      = {2025},
  url       = {https://mineralindex.org/minerals/iridian-tulameenite-35975}
}