Abstract
The extensive use of lithium in medicine and its potential anticaries action has attracted attention to its role in biological mineralization. In the present work, the effect of lithium ion on the direct precipitation of hydroxyapatite (HAP) from dilute calcium phosphate solutions was studied at sustained supersaturation. Increased levels of lithium (up to ∼ 40 ppm) reduced significantly the rate of crystallization of HAP. A reduction of the measured unit cell lattice parameters of the precipitated HAP suggests a limited incorporation of lithium ions into the HAP lattice, too small to be detected analytically.
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