Use a slightly different temperature for how cool the surface of the Earth is, for instance, and suddenly an
apatite crystal might look like it's been buried for much longer.
Indeed, abundant
apatite crystals were identified in the lumens of loops of Henle.
showed a calcium phosphate rich interface layer with
apatite crystals grown on solid state reaction between glass ceramic and bone.
Dental enamel is arranged in the form of hexagonal
apatite crystals.
Their simulations revealed that the unusually hydrogen-rich
apatite crystals observed in many lunar rock samples may not have formed within a water-rich environment, as originally thought.
It found that theobromine increased the size of the
apatite crystals which form tooth enamel.
The aim of this study was therefore to investigate the feasibility of fabricating nano-size and needle-like shape HAP crystals at low temperature, mimicking the morphology and size of bone
apatite crystals.
The reduction in specific surface area resulting from calcination is due to both growth of
apatite crystals and sintering of crystals, the latter being a consequence of adhesion of particles by expansion of interfacial contact points to form bonded aggregates (Kuczynski 1965).
