Ap. Shpak et al., PECULIARITIES OF THE ELECTRONIC-STRUCTURE OF THE ULTRA DISPERSE CALCIUM HYDROXYAPATITE, Journal of electron spectroscopy and related phenomena, 88, 1998, pp. 973-976
The electronic structure of the occupied part of the valence band of t
he Ca atom in calcium metal, CaO, CaCO3, Ca-3(PO4)(2), Ca-10(PO4)(6)(O
H)(2), biliary calculi, eggshell, and hydroxyapatite (HAP) of the huma
n bone tissue was studied by X-ray emission spectroscopy. A coincidenc
e is established between the K-bands of calcium in fine crystalline bo
ne-salt and artificial chemical. The spectra reveal considerable local
ization of the d-shell of calcium in the compounds studied. (C) 1998 E
lsevier Science B.V.