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In crystallography, the diamond cubic crystal structure is a repeating pattern of 8 atoms that certain materials may adopt as they solidify. While the first known example was diamond, other elements in group 14 also adopt this structure, including α-tin, the semiconductors silicon and germanium, and silicon–germanium alloys in any proportion.
From mid-July 1871 [ 3] to 1914 up to 50,000 miners dug the hole with picks and shovels, [ 4] yielding 2,720 kilograms (6,000 lb; 13,600,000 carats) of diamonds. The Big Hole has a surface of 17 hectares (42 acres) and is 463 metres (1,519 ft) wide. It was excavated to a depth of 240 metres (790 ft), but then partially infilled with debris ...
Diamond cutting is the practice of shaping a diamond from a rough stone into a faceted gem. Cutting diamonds requires specialized knowledge, tools, equipment, and techniques because of its extreme difficulty. The first guild of diamond cutters and polishers (Diamantaire) was formed in 1375 in Nuremberg, Germany, [1] and led to the development ...
Desert Diamond Arena (originally Glendale Arena and formerly Jobing.com Arena and Gila River Arena) is an indoor entertainment arena located in Glendale, Arizona, which anchors the 223-acre, $1 billion Westgate Entertainment District . Located about 12.5 miles (20.1 km) northwest of downtown Phoenix, the arena was built east of Arizona Loop 101 ...
A regular dodecagon is a figure with sides of the same length and internal angles of the same size. It has twelve lines of reflective symmetry and rotational symmetry of order 12. A regular dodecagon is represented by the Schläfli symbol {12} and can be constructed as a truncated hexagon, t {6}, or a twice-truncated triangle, tt {3}.
Material properties of diamond. Burns above 700 °C in air. Diamond is the allotrope of carbon in which the carbon atoms are arranged in the specific type of cubic lattice called diamond cubic. It is a crystal that is transparent to opaque and which is generally isotropic (no or very weak birefringence ).
There are a limited number of commercially available diamond mines currently operating in the world, with the 50 largest mines accounting for approximately 90% of global supply. [1] Diamonds are also mined alluvially over disperse areas, where diamonds have been eroded out of the ground, deposited, and concentrated by water or weather action.
1967–Present. Discovered in 1951, Jaduguda Mine has the distinction of being the first uranium mine of the country. The mine is accessed through two 5-metre (16 ft) diameter vertical shafts of depth of 640 m (2,100 ft), attaining a total depth of 905 m (2,969 ft). Narwapahar Mine. Jharkhand. Jadugora, East Singhbhum. Uranium Corporation of India.