Search results
Results from the WOW.Com Content Network
Cinnabar is the more stable form, and is a structure akin to that of HgO: each Hg center has two short Hg−S bonds (each 2.36 Å), and four longer Hg···S contacts (with 3.10, 3.10, 3.30 and 3.30 Å separations). In addition, HgS is found in a black, non-cinnabar polymorph (metacinnabar) that has the zincblende structure. [5]
Bullock team at Cinnabar, circa 1900. In 1872, the mineral cinnabar (a sulphide of mercury) was found on the sheep station of J.D. Mactaggart west of Kilkivan. The heavy dark-red stones found contained 24% mercury in addition to copper selenide. Mercury was extensively used in gold production in Australia at that time, but no significant ...
Margaret Petherbridge Farrar (March 23, 1897 – June 11, 1984) was an American journalist and the first crossword puzzle editor for The New York Times (1942–1968). Creator of many of the rules of modern crossword design, she compiled and edited a long-running series of crossword puzzle books – including the first book of any kind that Simon & Schuster published (1924). [1]
A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter, while the black squares are used to ...
red cinnabar (α-HgS, trigonal, hP6, P3221) is the form in which mercury is most commonly found in nature. Cinnabar has rhombohedral crystal system. Crystals of red are optically active. This is caused by the Hg-S helices in the structure. [5] black metacinnabar (β-HgS) is less common in nature and adopts the zinc blende crystal structure (T 2 ...
Hardy cyclamen are a lovely ground cover that get better with each passing year. Native to areas of the Mediterranean such as Greece, Italy, Turkey, and Israel, this low-growing plant has delicate ...
None of President-elect Trump's Cabinet nominees can be confirmed until he takes office on Jan. 20 – and expect a traffic jam in the Senate when he does.
Archaeologists have unearthed strange alien-looking statues with elongated heads from over 7,000 years ago in Kuwait, shedding more light on the origin and evolution of one of the oldest ...