Sperrylite
Mineral PtAs2
Take care.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
Tin-white, heavy cubes and cuboctahedrons, a platinum ore. Discovered at Sudbury, Ontario, and named for Francis Sperry; large crystals come from Talnakh, Russia.
- Type
- Mineral
- Group
- Arsenide, pyrite group
- Formula
- PtAs2
- Hardness (Mohs)
- 6–7
- Specific gravity
- 10.5–10.6
- Streak
- black
- Lustre
- metallic
- Crystal system
- Isometric (cubic)
- Colours
- tin white
- Transparency
- opaque
- Cleavage and fracture
- indistinct cubic; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.