1. Polymorphism of tricalcium silicate in Portland cement: A fast visual identification of structure and superstructure
2. Webster (2021). “Portland cement.” Merriam-Webster.com Dictionary, Merriam-Webster. Available at: https://www.merriam-webster.com/dictionary/portland%20cement (accessed 14 August 2021).
3. The Powder Diffraction File: a quality materials characterization database
4. Total pattern analyses for non-crystalline materials
5. Private Communication – over a period of several decades the author has studied many lime and calcite deposits by both XRD and XRF. In addition, he has studied Mg in calcite in a variety of shellfish, most notably quahogs, oysters and lightning whelks. Also see Berg, R. D., Solomon, E. A. and Tang, F.-Z. (2019). 'The role of marine sediment diagenesis in the modern oceanic magnesium cycle';Fawcett;Nat. Commun,2021