Wumuite

wumuite

tewite

zircon

monazite-(Ce)

Images

Formula: KAl0.33W2.67O9
Oxide, tungsten-bearing mineral
Crystal System: Hexagonal
Specific gravity: 6.52 calculated
Hardness: 5 to 6
Streak: White
Colour: Light green
Environments

Plutonic igneous environments
Hydrothermal environments

Wumuite is a relatively new mineral, approved in 2018 and to date (March 2023) reported only from the type locality.

Localities

At the type locality, Nanyang, Huaping County, Lijiang, Yunnan, China, wumuite was found in biotitequartz monzonite as light green hexagonal tabular crystals, up to 0.3 mm in diameter. Associated minerals include quartz, orthoclase, albite, biotite, hornblende, kaolinite, ilmenite, goethite, hematite, zircon, zoisite, tourmaline, monazite-(Ce), allanite-(Ce), scheelite, tellurite and tewite.
The formation of wumuite is likely related to the nearby quartz-vein-type gold mineralisation; it was formed by the metasomatic reaction between tungsten-rich hydrothermal fluids and the K-feldspar in the monzonite (EJM 32.483–494).

Back to Minerals