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Industrial-grade nitrogen sources modulate CaCO3 polymorphs and strength in MICP-cemented sand: A structure–property study
Fig 7
Polymorphic composition of CaCO3 precipitates under different nitrogen source substitutions.
XV: molar ratio of vaterite; XC: molar ratio of calcite.
doi: https://doi.org/10.1371/journal.pone.0348780.g007