Analysis of Ca_1-xSr_xCO₃ phases generated by competitive Sr²⁺ replacement in pre-formed aragonite.

ABSTRACT: The ratio of Sr/Ca ions in marine biogenic minerals is considered advantageous for tracking geochemical and biomineralization processes that occur in the oceans. It is debatable, though, whether the ratio in biominerals such as coral skeleton is simply related to values in the seawater environment or controlled by the organism. Recent data show that coral larvae produce partially disordered immature aragonite in Mg-containing Sr-poor calcifying fluids, which transforms into well-ordered aragonite in Mg-depleted Sr-enriched environments, upon animal metamorphosis into the sessile polyp state. Inspired by the process in young coral, we explored in vitro substitution of Ca by Sr in aragonite by exposing aragonite crystals precipitated a priori to Sr solutions with variable conce

SUBMITTER: Nasser S 

PROVIDER: S-EPMC11408075 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature