Bone mineral and synthetic calcium-deficient carbonate apatite (CDCA), when defined in terms of their respective thermal stabilities and ignition products, are homologous. When heated to 550°, they may have a structure similar to that of the mineral dahllite. When heated to temperatures >550°, CDCA (like bone mineral) loses its structural CO3 and is recrystallized to whitlockite and/or OH-apatite, depending on its stoichiometry.
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