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1887
Volume 30, Issue 2
  • ISSN: 0032-1400

Abstract

The properties of platinum make it very suitable for many exacting applications where absolute consistency must be maintained in fluctuating conditions over long periods of time. One of the earliest uses of platinum and its alloys was for the manufacture of standard weights and measures, while the platinum resistance thermometer is still used to fix a wide range of temperatures on the International Practical Temperature Scale. Additionally, for a long period platinum contributed to the definition of the candela, the international unit of luminous intensity. This article gives a brief account of some of the pioneering work carried out by people seeking to establish a primary standard of light by utilising the unique properties of platinum.

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1986-01-01
2024-07-14
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