Table 1. Infrared parameters commonly used to analyze bone tissue.

Parameter	Region analyzed (cm-1 / cm-1)	Meaning
Mineral/matrix ratio (phosphate ν1ν3 / Amide I)	920–1200 / 1596–1712 +	Mineral content relatively to matrix (collagen) content
Crystallinity	1030 / 1020 *	Size and perfection of the hydroxyapatite crystals
Acid phosphate substitution ratio	1128 / 1096 *	Quantity of acid phosphate substituted into the crystal lattice
Collagen maturity	1660 / 1690 *	Maturity of the collagen enzymatic crosslinks

+ Ratio of areas under the bands,

* Ratio of intensities at the indicated wavenumbers