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2. List of discontinued Volkswagen Group petrol engines

   en.wikipedia.org/wiki/List_of_discontinued...

   The spark-ignition petrol (gasoline) engines listed below were formerly used in various marques of automobiles and commercial vehicles of the German automotive business Volkswagen Group [1] and also in Volkswagen Industrial Motor applications, but are now discontinued.

3. Niterra - Wikipedia

   en.wikipedia.org/wiki/Niterra

   Niterra established its first European subsidiary, NGK SPARK PLUG (U.K.) Ltd. in 1975. In 1979, its second European subsidiary, NGK SPARK PLUG DEUTSCHLAND GmbH, was founded in Germany. [6] Ten years later, it was renamed NGK SPARK PLUG EUROPE GmbH when it took charge of operations in Europe. In 2017, its remit further expanded across the EMEA ...

4. NGK Insulators - Wikipedia

   en.wikipedia.org/wiki/NGK_Insulators

   NGK is headquartered in Tokyo (Marunouchi Bldg. 25F, 2-4-1, Marunouchi, Chiyoda-ku, Tokyo 100–6325) and is listed on the Nikkei 225, which is an index of the Tokyo Stock Exchange. [2] It is also listed in the Osaka Securities Exchange , the Nagoya Stock Exchange , and the Sapporo Securities Exchange all under listing code 5333.

5. Organoiridium chemistry - Wikipedia

   en.wikipedia.org/wiki/Organoiridium_chemistry

   Organoiridium compounds share many characteristics with those of rhodium, but less so with cobalt. Iridium can exist in oxidation states of -III to +V, but iridium(I) and iridium(III) are the more common. iridium(I) compounds (d 8 configuration) usually occur with square planar or trigonal bipyramidal geometries, whereas iridium(III) compounds (d 6 configuration) typically have an octahedral ...

6. Iridium compounds - Wikipedia

   en.wikipedia.org/wiki/Iridium_compounds

   Iridium compounds are compounds containing the element iridium (Ir). Iridium forms compounds in oxidation states between −3 and +9, but the most common oxidation states are +1, +2, +3, and +4. [2] Well-characterized compounds containing iridium in the +6 oxidation state include IrF 6 and the oxides Sr 2 MgIrO 6 and Sr 2 CaIrO 6.

7. Electrical resistivities of the elements (data page) - Wikipedia

   en.wikipedia.org/wiki/Electrical_resistivities_of...

   As quoted in an online version of: David R. Lide (ed), CRC Handbook of Chemistry and Physics, 84th Edition.CRC Press. Boca Raton, Florida, 2003; Section 4, Properties of the Elements and Inorganic Compounds; Physical Properties of the Rare Earth Metals

8. Radioisotope thermoelectric generator - Wikipedia

   en.wikipedia.org/wiki/Radioisotope...

   Diagram of an RTG used on the Cassini probe. A radioisotope thermoelectric generator (RTG, RITEG), sometimes referred to as a radioisotope power system (RPS), is a type of nuclear battery that uses an array of thermocouples to convert the heat released by the decay of a suitable radioactive material into electricity by the Seebeck effect.

9. Platinum–iridium alloy - Wikipedia

   en.wikipedia.org/wiki/Platinum–iridium_alloy

   The international prototype of the kilogram (IPK) is an artifact standard of platinum–iridium alloy that was defined as having a mass of exactly one kilogram. Platinum–iridium alloys are alloys of the platinum group precious metals platinum and iridium. Typical alloy proportions are 90:10 or 70:30 (Pt:Ir).