Characterization of calcite spines of planktonic foraminifers (Globigerinidae)

Kenta Izumida, Mihiro Takasaki, Rina Fujimaki, Yukiko Nagai, Yuya Oaki, Kimiyoshi Naito, Yoshihisa Tanaka, Shinji Shimode, Takashi Toyofuku, Hiroaki Imai

Research output: Contribution to journalArticlepeer-review


Calcitic spines ∼1 μm in diameter are projecting from a trochospiral test of a spinose planktonic foraminifer. According to electron diffraction, Raman spectra, and detailed electron microscope observation, the spines were found to be a single-crystal-like calcite that has a nanogranular texture containing microstrain. An organic envelope protects the biogenic calcite against dissolution in water. Their unique mechanical and chemical properties are ascribed to the specific micro- and nanoscopic structures. This journal is

Original languageEnglish
Publication statusAccepted/In press - 2022

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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