Osmium | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-08

This is an audio version of the Wikipedia Article:
Osmium


00:00:44 1 Characteristics
00:00:53 1.1 Physical properties
00:02:09 1.2 Chemical properties
00:04:52 1.3 Isotopes
00:06:35 2 History
00:09:23 3 Occurrence
00:11:05 4 Production
00:13:17 5 Applications
00:17:09 6 Precautions
00:18:07 7 Price



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SUMMARY
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Osmium (from Greek ὀσμή osme, "smell") is a chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Osmium is the densest naturally occurring element, with an experimentally measured (using x-ray crystallography) density of 22.59 g/cm3. Manufacturers use its alloys with platinum, iridium, and other platinum-group metals to make fountain pen nib tipping, electrical contacts, and in other applications that require extreme durability and hardness. The element's abundance in the Earth's crust is among the rarest.