The concentration of Sm and Nd in silicate minerals increase with the order in which they crystallise from a magma according to Bowen's reaction series.
12.
For the definition reaction series, ? * was set to 1 and R = methyl was defined as the reference reaction ( ? * = zero ).
13.
Similar to the polar sensitivity factor, the steric sensitivity factor ? for a new reaction series will describe to what magnitude the reaction rate is influenced by steric effects.
14.
Oceanic crust, on the otherhand, is made from mafic rock, basalt, which is made of amphiboles and pyroxenes, which crystallize earlier in the Bowens reaction series.
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He repeated this process with progressively cooler temperatures and the results he obtained led him to formulate his reaction series which is still accepted today as the idealized progression of minerals produced by cooling magma.
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On their main channel, the brothers upload a multitude of series, creating some of the most popular scripted, narrative, and unscripted series in web history including their award winning and notable reaction series.
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Where " k s " is the rate of the studied reaction and \ mathit k _ { CH3 } is the rate of the reference reaction ( R = methyl ) . ? is a reaction constant that describes the susceptibility of a reaction series to steric effects.
18.
Within the field of geology, "'Bowen's reaction series "'is the work of the petrologist, Norman L . Bowen who was able to explain why certain types of minerals tend to be found together while others are almost never associated with one another.
19.
The ideal scenario according to Bowen's reaction series would see a granite melt begin crystallizing a cumulate assemblage of plagioclase and hornblende ( i . e .; tonalite or diorite ), which is low in K ( and hence Rb ) but high in Sr ( as this substitutes for Ca ), which proportionally enriches the melt in K and Rb.
20.
Where log ( k s / k CH 3 ) B is the ratio of the rate of the base catalyzed reaction compared to the reference reaction, log ( k s / k CH 3 ) A is ratio of a rate of the acid catalyzed reaction compared to the reference reaction, and ? * is a reaction constant that describes the sensitivity of the reaction series.
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