tungstenite

tungstenite

[′təŋ·stə‚nīt]
(mineralogy)
WS2 A dark lead gray mineral consisting of tungsten disulfide; occurs in massive form, in scaly or feathery aggregates.
References in periodicals archive ?
Portuguese firm applies Tungstenite tungsten disulfide dry-film lubricant coatings to mold plates.
Scheelite, tungstenite and cassiterite preceded or accompanied the copper minerals.
1974) report that tungstenite lamellae are always present near germanite, having probably been deposited when renierite replaced germanite, considering that renierite does not accept W in its structure as germanite does.