Langite is a rare hydrated copper sulfate mineral, with hydroxyl, found almost exclusively in druses of small crystals. It is formed from the oxidation of copper sulfides, and was first described in specimens from Cornwall, United Kingdom. It is dimorphous with wroewolfeite.

Cu4(SO4) (OH)6 · 2H2O. Blue, greenish-blue. Named by Nevil Story-Maskelyne in 1864 in honor of Victor von Lang (2 March 1838, Vienna, Austrian Empire - 3 July 1921, Vienna, Austria), physicist and crystallographer, Professor of Physics, University of Vienna, Vienna, Austria.

Dec 24, 2015 · Beautiful blue-green langite specimens form naturally throughout the world. A natural rarity, l angite is an unusual species of mineral – specifically, hydrated copper sulfate with hydroxyl.

Dec 6, 2024 · Langite, a striking blue-green mineral, captures the imagination of rock enthusiasts and geologists alike. But what exactly is Langite? This mineral is a hydrated copper sulfate, often found in the oxidized zones of copper deposits. Its vibrant color and unique crystal structure make it a favorite among collectors.

Langite: Formula: Cu 4 (SO 4)(OH) 6 · 2H 2 O: Confirmation: Validity: Believed Valid: Associated Minerals Based on Photo Data: Malachite ⓘ1 photo of Langite associated with Malachite at this locality. Data: Mineral Data: Click here to view Langite data: Locality Data: Click here to view Clark Mine, Copper Harbor, Grant Township, Keweenaw ...

Fowey Consols, Tywardreath, Par Area, St Austell District, Cornwall, England, UK Link to MinDat.org Location Data. Named after the Viennese physicist, V. von Lang (1838-1921). Comments: Bluish, tabular blades of twinned langite crystals on matrix. Location: Mollau, France. Scale: Not Given.

Crystals, showing {001}, {010}, {100}, {110}, {021}, to 7 mm, commonly skeletal; in wavy to flat crusts, earthy, massive. Twinning: On {110}, typically repeated to give snowflakelike or star-shaped groupings. Physical Properties: Cleavage: On {001} and {010}. D(meas.) = 3.28–3.34 D(calc.) = 3.26–3.37 Hardness = 2.5–3. Translucent.

The meaning of LANGITE is a mineral Cu4(SO4)(OH)6.H2O (?) composed of a basic hydrous sulfate of copper.

Langite is one of the nicest oxydised mineral near bornite. This specimen has been found perhaps more than 10 years ago into a gallery of an old slate quarry. Today, the access is helas forbidden.

Langite occurs as a secondary mineral in oxidized copper sulfide deposits, and may be of post-mine in origin. Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/langite.pdf