Abstract

Intergrowth defects (intercalation of different structure types) are common in some rock-forming minerals and can be demonstrated to affect trace element distributions, especially when new crystallographic site types are introduced by the intercalated structure. Atoms that do not readily substitute into the host crystal may be incorporated within the intercalated structure. Trace element partitioning patterns, EPR data and mineral dislocation densities suggest that dislocations do not exercise primary control on the partitioning of compatible trace elements, but the effects of dislocations on incompatible elements may be important. Intergrowth defects in geologically important materials include disordered intergrowth structures in Sulfides and the stacking and chain-width disorder that is found in pyroxenes and amphiboles from a range of occurrences. Intergrowth defects may range from a few Ångstroms wide to optically resolvable size. It is important to evaluate their effects when interpreting geological trace element data.

Original languageEnglish (US)
Pages (from-to)669-678
Number of pages10
JournalGeochimica et Cosmochimica Acta
Volume42
Issue number6
DOIs
StatePublished - 1978

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Crystal defects
High resolution electron microscopy
Trace Elements
electron microscopy
defect
dislocation
trace element
crystal
Defects
Minerals
partitioning
Amphibole Asbestos
Sulfides
mineral
electron spin resonance
Intercalation
stacking
amphibole
Paramagnetic resonance
Rocks

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Trace elements, crystal defects and high resolution electron microscopy. / Buseck, P R; Veblen, David R.

In: Geochimica et Cosmochimica Acta, Vol. 42, No. 6, 1978, p. 669-678.

Research output: Contribution to journalArticle

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