Tungstite
Encyclopedia
Tungstite is a hydrous tungsten
oxide
mineral with formula: W
O
3·H2O
. It is a secondary mineral formed by the weathering
of other tungsten containing minerals. It crystallizes in the orthorhombic system in translucent yellow to yellow green masses. It is clay-like with Mohs hardness of 2.5 and a specific gravity
of 5.5.
It was first described in 1868 for an occurrence near Trumbull, Connecticut
at the Hubbard Tungsten Mine at Long Hill
.
Tungsten
Tungsten , also known as wolfram , is a chemical element with the chemical symbol W and atomic number 74.A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth only in chemical compounds. It was identified as a new element in 1781, and first isolated as...
oxide
Oxide
An oxide is a chemical compound that contains at least one oxygen atom in its chemical formula. Metal oxides typically contain an anion of oxygen in the oxidation state of −2....
mineral with formula: W
Tungsten
Tungsten , also known as wolfram , is a chemical element with the chemical symbol W and atomic number 74.A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth only in chemical compounds. It was identified as a new element in 1781, and first isolated as...
O
Oxygen
Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...
3·H2O
Water
Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a...
. It is a secondary mineral formed by the weathering
Weathering
Weathering is the breaking down of rocks, soils and minerals as well as artificial materials through contact with the Earth's atmosphere, biota and waters...
of other tungsten containing minerals. It crystallizes in the orthorhombic system in translucent yellow to yellow green masses. It is clay-like with Mohs hardness of 2.5 and a specific gravity
Specific gravity
Specific gravity is the ratio of the density of a substance to the density of a reference substance. Apparent specific gravity is the ratio of the weight of a volume of the substance to the weight of an equal volume of the reference substance. The reference substance is nearly always water for...
of 5.5.
It was first described in 1868 for an occurrence near Trumbull, Connecticut
Trumbull, Connecticut
Trumbull, a town in Fairfield County, Connecticut in the New England region of the United States, is bordered by the towns of Monroe, Shelton, Stratford, Bridgeport, Fairfield and Easton along Connecticut's Gold Coast. The population was 36,018 according to the 2010 census.Family Circle magazine...
at the Hubbard Tungsten Mine at Long Hill
Old Mine Park Archeological Site
The Old Mine Park Archaeological Site is a historic site in the Long Hill, Trumbull, Connecticut section of Trumbull, Connecticut. It was mined from 1828 to 1920 and during 1942-1946...
.