Steacyite is a complex silicate mineral containing thorium and uranium; formula . It forms small brown or yellow green crystals, often cruciform twinned crystals. It is radioactive. It was discovered at Mont-Saint-Hilaire, Quebec in 1982 and is named after Harold Robert Steacy (1923–2012), mineralogist.

References

Notes

Sources

• Handbook of Mineralogy

• mindat page for steacyite

See also

• List of minerals

• List of minerals named after people