from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white crystalline platinum mineral, essentially PtAs2.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An isometric-diploidal tin white mineral containing arsenic and platinum.
from the GNU version of the Collaborative International Dictionary of English
- n. An arsenide of platinum occuring in grains and minute isometric crystals of tin-white color. It is found near Sudbury, Ontario Canada, and is the only known compound of platinum occuring in nature.
from The Century Dictionary and Cyclopedia
- n. A native arsenide of platinum, occurring in minute isometric crystals with pyrite and chalcopyrite at the Vermilion mine, near Sudbury in Ontario.
A platinum arsenide, called sperrylite, is sometimes found associated with sulphide minerals in basic igneous rocks.
The 516 samples were also examined for their base or precious metals potential, with 213 of the samples containing at least one gold grain and 31 samples containing one or more grains of sperrylite, a platinum-bearing mineral that is often associated with rocks containing significant amounts of platinum, palladium and nickel.