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What is incompatible element in chemistry?
In petrology and geochemistry, an incompatible element is one that is unsuitable in size and/or charge to the cation sites of the minerals of which it is included. It is defined by the partition coefficient between rock-forming minerals and melt being much smaller than 1.
What elements are compatible with olivine?
The trace element that is compatible with olivine is nickel, an element which substitutes for Fe and Mg in olivine. The experimentally determined value for K (the partition coefficient) is about 12. What is an incompatible element in geology? Incompatible elements are those that prefer to be in the liquid phase rather than the solid phase of a melt. Over time, and with partial melting of the mantle, continental and oceanic crusts become enriched in the incompatible elements relative to the mantle melt residual.
Is Phosphorus an incompatible element?
Data compiled by (1) suggests that P and La are correlated ~ for lunar samples . However , it is possible that the correlation they observe is partly due to mixing of a primitive and a KREEP component , rather than incompatibility. Rare occurrences of P-rich silicates suggest that P is not always incompatible. Regarding this, is strontium an incompatible element? Consequently, in mantle systems, strontium is an incompatible element, strongly enriched in the melts. In crustal systems the extensive involvement of the feldspar minerals can produce large depletions in crustally derived melts; some granites contain < 10 ppm Sr.
Is nickel compatible in olivine?
It is the compatibility of Ni in olivine relative to silicate melt, which contrasts with the behavior of most other minor and trace elements, that makes it so useful in constraining igneous petrogenesis. Also, what are incompatible and compatible elements? Compatibility controls the partitioning of different elements during melting. The compatibility of an element in a rock is a weighted average of its compatibility in each of the minerals present. By contrast, an incompatible element is one that is least stable within its crystal structure.
What incompatible element is incorporated in apatite?
Zr and Hf are incompatible in apatite, and D Zr /D Hf is usually > 1 (Prowatke and Klemme, 2006).
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