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Beginning in 1957, the company published the journal Platinum Metals Review with the support of the Rustenburg Platinum Mines. [7] [8] In the 1960s Johnson Matthey formed a subsidiary, Johnson Matthey Bankers (JMB), which took its seat in the London Gold Fixing. In the early 1980s the bank expanded its activities outside the bullion business ...
Police also recovered ten bullion bars bearing the refiner's mark and serial numbers of bars stolen in the Brink's-Mat robbery. [54] According to the police spokesman, the bars were gold-coated tungsten counterfeits, and therefore could not be Johnson Matthey's stolen gold bars. He said that the arrested men planned to fraudulently claim they ...
Johnson Matthey Technology Review, known as Platinum Metals Review before 2014, is a quarterly, open access, peer-reviewed scientific journal publishing reports on scientific research on the platinum group metals and related industrial developments. [1]
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The international prototype of the kilogram (IPK), a cylinder made of platinum–iridium, and the international prototype of the metre, an X-cross-section bar also made from platinum–iridium, were selected from batches manufactured by the British firm Johnson Matthey. Working copies of both artifacts were also selected by lot and other copies ...
Platinum is a chemical element; it has symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Its name originates from Spanish platina, a diminutive of plata "silver". [7] [8] Platinum is a member of the platinum group of elements and group 10 of the periodic table of ...
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