Yedlinite
Yedlinite is a rare mineral with the chemical formula lead hexachromium chloride hydroxide oxide. It belongs to the trigonal crystal system and is classified under the Strunz category 3.DB.50 and the Dana classification 10.6.3.1. This mineral is characterized by its metallic luster, dark gray to black color, and relatively low hardness. It has a moderate density and is typically found in association with other rare minerals. As a hydroxide, it is part of a broader group of minerals formed under specific geochemical conditions, often in hydrothermal or metamorphic environments.
Composition
- PbLead76.0%
- ClChlorine13.0%
- OOxygen7.8%
- CrChromium3.2%
Overview
Yedlinite is a rare mineral with the chemical formula lead hexachromium chloride hydroxide oxide. It belongs to the trigonal crystal system and is classified under the Strunz category 3.DB.50 and the Dana classification 10.6.3.1. This mineral is characterized by its metallic luster, dark gray to black color, and relatively low hardness. It has a moderate density and is typically found in association with other rare minerals. As a hydroxide, it is part of a broader group of minerals formed under specific geochemical conditions, often in hydrothermal or metamorphic environments.
Etymology
Yedlinite is named after Leo Neal Yedlin, in recognition of his contributions to mineralogy. The mineral was officially approved by the International Mineralogical Association (IMA).
How to recognize it
Yedlinite can be identified by its metallic luster and dark gray to black color. It has a relatively low hardness on the Mohs scale, though the exact value is not specified. The mineral typically exhibits a streak that reflects its dark coloration. Due to its rarity and specific chemical composition, it is often confused with other lead-based hydroxides, but its unique chemical formula and crystal system aid in differentiation.
Trivia
Yedlinite is notable for its complex chemical formula, which includes both chloride and hydroxide ions. It is a rare mineral, with very limited known occurrences. The mineral is named after a significant figure in mineralogy, Leo Neal Yedlin, which adds to its historical interest.