Welinite
Welinite is a rare inorganic mineral with the chemical formula Mn^2⁺6(W6+,Mg)2(SiO4)2(O,OH)6. It belongs to the trigonal crystal system and is classified under the Strunz system as 9.AF.75 and the Dana system as 7.3.1.1. Welinite is characterized by its complex composition, which includes manganese, tungsten, magnesium, silicon, oxygen, and hydroxide. It typically exhibits a dull luster and may vary in color depending on its impurities. The mineral is relatively dense and has a moderate hardness. Welinite is considered a member of the inorganic mineral group due to its unique chemical structure and formation conditions.
Overview
Welinite is a rare inorganic mineral with the chemical formula Mn^2⁺6(W6+,Mg)2(SiO4)2(O,OH)6. It belongs to the trigonal crystal system and is classified under the Strunz system as 9.AF.75 and the Dana system as 7.3.1.1. Welinite is characterized by its complex composition, which includes manganese, tungsten, magnesium, silicon, oxygen, and hydroxide. It typically exhibits a dull luster and may vary in color depending on its impurities. The mineral is relatively dense and has a moderate hardness. Welinite is considered a member of the inorganic mineral group due to its unique chemical structure and formation conditions.
Etymology
Welinite is named after Eric Welin, in recognition of his contributions to mineralogy. The mineral was officially redefined by the IMA, but no specific discovery year is mentioned in the facts.
How to recognize it
Welinite can be identified through its moderate hardness, though the exact Mohs hardness value is not provided. It typically exhibits a dull luster and may have a variable color depending on impurities. The mineral can be distinguished from similar species by its unique chemical composition and crystal system. A streak test may help in identification, although specific details on its streak color are not available.
Trivia
Welinite has a complex and unusual chemical formula that includes both tungsten and magnesium in its structure. It belongs to the trigonal crystal system and has a specific space group of P3, which is relatively rare. The mineral is named after Eric Welin, a notable figure in mineralogy, which adds to its historical interest.