The calcium phosphate which corresponds to the formula Ca-3(PO)(4). H2O (2
< n < 3) was isolated from solutions with Ca/P molar ratio 0.2 and pH 7. Th
e compound was characterised by chemical and thermogravimetric analyses, Fo
urier-transform infrared (FTIR) spectroscopy and X-ray diffraction. The FTI
R spectra were compared with spectra of beta-tricalcium phosphate (beta-TCP
) in the atlases for analysis of urinary calculi and other literature data.
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