Weibullite
Weibullite is a rare sulfosalt mineral with the chemical formula Ag0.3Pb5.3Bi8.3(S,Se)18. It belongs to the orthorhombic crystal system and is classified in the Strunz system as 2.JB.25h and in the Dana system as 3.6.18.1. This mineral is composed primarily of lead, bismuth, and sulfur or selenium, with minor silver content. It exhibits a metallic luster and is typically found in dark, opaque colors. Weibullite is relatively dense and has a hardness that is consistent with sulfosalt minerals, though specific values are not commonly reported. It is part of the sulfosalt mineral group, which is known for complex chemical compositions and structural arrangements.
Overview
Weibullite is a rare sulfosalt mineral with the chemical formula Ag0.3Pb5.3Bi8.3(S,Se)18. It belongs to the orthorhombic crystal system and is classified in the Strunz system as 2.JB.25h and in the Dana system as 3.6.18.1. This mineral is composed primarily of lead, bismuth, and sulfur or selenium, with minor silver content. It exhibits a metallic luster and is typically found in dark, opaque colors. Weibullite is relatively dense and has a hardness that is consistent with sulfosalt minerals, though specific values are not commonly reported. It is part of the sulfosalt mineral group, which is known for complex chemical compositions and structural arrangements.
Etymology
Weibullite is named after Mats Weibull, in recognition of his contributions to the field of mineralogy.
How to recognize it
Weibullite can be identified by its metallic luster and dark, opaque color. It has a relatively high density, which can be a distinguishing feature. The mineral is not typically tested for hardness in standard mineral identification due to its rarity and complex composition. It does not have a characteristic streak and is often confused with other sulfosalt minerals due to similar physical properties. Careful chemical analysis is usually required for accurate identification.
Trivia
Weibullite has a complex and unusual chemical formula that includes a mix of lead, bismuth, sulfur, and selenium with a minor silver content. It is part of the orthorhombic crystal system, which is less common among sulfosalt minerals. The mineral was redefined by the IMA, indicating that its classification and properties have undergone significant revision, highlighting its scientific interest.