Danielsite is a mineral that belongs to the rare mineral class called sulfosalts. It is classified as a member of the lillianite group. The mineral is opaque, meaning it does not allow light to pass through, and it typically occurs in prismatic or acicular crystal formations. Danielsite possesses a metallic luster, giving it a shiny appearance. It is named after its discoverer, Dr. Peter Daniels, an Australian mineralogist.
Chemically, danielsite is composed of lead, bismuth, antimony, and sulfur, with the chemical formula PbBiAntimony2S6. Its structure consists of chains of sulfur atoms, with alternating layers of lead-bismuth and antimony atoms formed between them. This unique arrangement gives danielsite its distinctive crystallographic properties.
In terms of physical properties, danielsite is relatively soft on the Mohs scale, with a hardness ranging from 2.5 to 3. It has a high density and is slightly malleable, meaning it can be shaped without breaking. The color of danielsite varies, typically ranging from dark gray to black. It can also exhibit some metallic colors depending on impurities present in the crystal lattice.
Danielsite is primarily found in hydrothermal deposits associated with other metallic minerals such as galena, pyrite, and chalcopyrite. Its occurrence is relatively rare and limited to certain localities worldwide, including Australia, Bolivia, Italy, and Russia.
Due to its scarcity and intriguing crystal structure, danielsite is of interest to collectors and mineral enthusiasts.
