The open encyclopedia of minerals
GlossaryCite the database
Mineralogist.org
Minerals A–ZSearchCollectionsBrowse by PropertyIdentify a SpecimenCompare MineralsLocalities MapGlossaryContribute Search the Database →
Sulfide

Ikunolite

Bi₄S₃
Hardness2
Crystal systemHexagonal
ClassSulfide
←PrevIkraniteNextIlesite→
Ikunolite specimen

Ikunolite Field of view: 1.3 cm Locality: Alsó-Rózsa adit, Nagybörzsöny, Szob District, Pest County, Hungary — Photo: Leon Hupperichs · CC BY-SA 3.0

Ikunolite

Ikunolite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Bi₄S₃.

It crystallizes in the hexagonal crystal system (space group R-3m). It is a member of the Tetradymite structural group.

Key properties: Mohs hardness 2; specific gravity 7.8; Dark gray streak; Metallic. Anisotropism: Nearly isotropic in basal section, moderately anisotropic, pale gray to gray luster.

IMA symbol Ik, IMA status: approved, named in 1959.

Found in a quartz vein (Ikuno mine, Japan).

It is found associated with Ferberite, bismuth, bismuthinite, joséite, molybdenite, arsenopyrite, cassiterite, chalcopyrite, quartz (Ikuno mine, Japan).

The name refers to the Ikuno mine, Japan, where it was first found.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more I minerals or help write this entry.