Calcite crystal growth orientation: implications for trace metal uptake into 
coccoliths

Payne, V. E.; Rickaby, R. E. M.; Benning, Liane G.; Shaw, S.

doi:10.1180/minmag.2008.072.1.269

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Calcite crystal growth orientation: implications for trace metal uptake into coccoliths

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Payne, V. E.
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Rickaby, R. E. M.
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Benning, Liane G.
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Shaw, S.
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Payne, V. E., Rickaby, R. E. M., Benning, L. G., Shaw, S. (2008): Calcite crystal growth orientation: implications for trace metal uptake into coccoliths. - Mineralogical Magazine, 72, 1, 269-272.
https://doi.org/10.1180/minmag.2008.072.1.269

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_806924

Abstract

Inorganic calcite precipitation experiments were conducted to determine whether inducing specific orientations of calcite crystal growth can cause the enrichment of cations larger than Ca. Malonic acid (CH2(COOH)(2)), a di-carboxylic acid, was used to poison growth oil acute kink sites, promoting growth Oil obtuse kink Sites, causing calcite crystals elongated along their c-axes to form in a mechainsm similar to that seen in the growth of E. huxleyi coccoliths. Calcite was precipitated with a range of malonic acid concentrations (0 to 10(-1) M), and 9 x 10(-5) M of either SrCl2 or MgCl2. The results show that calcite crystals precipitated in the presence of large malonic acid concentrations show significant elongation along the c axis, and Suggest that increasing malonate concentrations corresponded with increasing D-Sr Experiments with 10(-1) M malonic acid caused elevated D-Sr comparable to that predicted for E. huxleyi coccolith calcite (Langer et al., 2006).