There is no simple formula to calculate the metal bearing clearance. Manufacturers must specify the clearance for each individual bearing.
Platinum is the the metal known as white gold.
at the time of turbine start up, the shaft journals are in contact with the white metal of the bearings due to the weight of the rotor. The low pressure of the lubricating oil supply when the set is stationary is insufficient to stop the metal to metal contact between journals and bearing shells. In order to prevent the metal to metal contact between journal and bearing shell during start up, which is damaging in the long term, an oil pocket machined into the bottom shell of the journal bearing is supplied with oil under high pressure. This lifts the shafting system slightly and it floats on a film oil. this is called jacking oil system of turbine
the crankshaft and connecting rod big end bearings in a modern auto enginehave bearings made of a replaceable steel shell, keyed to the bearing caps. The inner surface of the steel shell is plated with a coating of bronze which is in turn coated with a thin layer of Babbitt metal as the bearing surface. The process of laying down this layer of white metal is known as Babbitting
Palladium is a metal; it is a transition metal.
Silver is a silver-white metal that does not tarnish easily due to its resistance to corrosion.
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Magnesium metal is silver/white in appearance.
What white metal is used for largely depends on what type of white metal one is discussing. White gold and platinum tend to be used in jewelry making and are very expensive. Other white metals such as chromium may be used in the making of coins.
White powder is probably a metal oxide because metal oxides commonly have a white color. Metal oxides are formed when metals react with oxygen, producing compounds like rust (iron oxide) or zinc oxide, which are white powders. Additionally, metal oxides are typically insoluble in water and have higher melting points.
Nickel
zinc
No, white metal is a generic term for various metals used in jewelry making, such as nickel or silver-colored alloys. Silver is a specific precious metal that is known for its lustrous white color and value.