Minerals described in 1986

Zhanghengite is a mineral consisting of 80% copper and zinc, 10% iron, and 10% chromium and aluminium. Its color is golden yellow. It was discovered in 1986 during the analysis of the Bo Xian meteorite and is named after Zhang Heng, an ancient Chinese astronomer.

Moolooite is a rare blue-green mineral with the formula Cu(C2O4)·n(H2O) (n<1) (copper(II) oxalate hydrate). It was discovered in Bunbury Well, Mooloo Downs station, Murchison, Western Australia in 1986. It has an orthorhombic crystalline structure, and is formed by the interaction of bird guano with weathering copper sulfides.

Zimbabweite is a yellow brown mineral with orthorhombic crystal habit and a hardness of 5, with formula . It is generally classed as an arsenite but is notable for also containing niobium and tantalum. It was discovered in 1986 in kaolinized pegmatite, i.e. weathered to clay, in Zimbabwe.

Eugenite is a rare silver-mercury mineral. It crystallizes in the orthorhombic crystal system.

Håleniusite-(La), chemical formula . is a yellow isometric mineral. It has a dull, earthy lustre. The geological setting of håleniusite-(La) is in vugs and leaching zones of massive ferriallanite-(Ce), intimately intergrown with cerite-(Ce) and bastnäsite-(La).

Rapidcreekite is a rare mineral with formula Ca2(SO4)(CO3)·4H2O. The mineral is white to colorless and occurs as groupings of acicular (needle-shaped) crystals. It was discovered in 1983 in northern Yukon, Canada, and described in 1986. Rapidcreekite is structurally and compositionally similar to gypsum.

Chaidamuite is a rare zinc – iron sulfate mineral with chemical formula: ZnFe3+(SO4)2(OH)·4H2O.

Minasgeraisite-(Y) is a discredited mineral species in the gadolinite supergroup with the chemical formula . Typically appearing as minute, purplish-lavender rosettes in granitic pegmatites, it was first identified at the José Pinto quarry in 1986 in Jaguaraçu, Minas Gerais, Brazil. The mineral was named after its type locality and approved by the International Mineralogical Association (IMA). Subsequent crystallographic and chemical analyses of the type material, as well as of comparable specimens from Norway and Central Europe, led to the mineral's discreditation in 2023. It is now regarded