Crookesite Crookesite Crookesite is a selenide mineral composed of copper and selenium with variable thallium and silver. Its chemical formula is reported either as Cu(Tl,Ag)Se or (Cu,Tl,Ag)Se. It is formed by precipitation from hydrothermal fluids, and contains by mass: 16.3% Tl, 47.3% Cu, 2.9% Ag, and 33.6% Se. Crookesite is an opaque, bluish grey to pink toned brown metallic mineral crystallizing in the tetragonal system. It has a Mohs hardness of 2.5 to 3 and a specific gravity of 6.9. It was discovered in 1866 in Skrikerum, Sweden and named for Sir William Crookes (1832–1919), the discoverer of the element thallium.
Cyprus, London nearest Docklands Light Railway station is Cyprus. The station is directly outside the University campus. Cyprus, London Cyprus is an area in the Docklands area of the London Borough of Newham. It is located west of Beckton and north of the eastern end of the Royal Albert Dock. It is named after the Cyprus Estate, a housing estate built for workers at the Royal Albert Dock, which opened in 1881. The estate was named to commemorate the United Kingdom's acquisition of the island of Cyprus in 1878. It was built on one of the few pieces of land not owned