Abstract
A natural calcite MNP is presented as potential reference material for microbeam oxygen and carbon isotope analysis.
Funding Information
  • National Natural Science Foundation of China (42130102)
  • National Natural Science Foundation of China (42173033)
  • National Science and Technology Major Project (2025ZD1009200)
  • National Science and Technology Major Project (2025ZD1006500)
  • Northwest University

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