Table 1 Chemical formulas and mass densities for type-I collagen, hydroxyapatite (HAp), and water, together with respective calculated neutron and X-ray scattering length densities.

From: Comparison of small-angle neutron and X-ray scattering for studying cortical bone nanostructure

 

Formula

Mass density (g/cm3)

Neutron scattering length density (cm−2)

X-ray scattering length density (cm−2)

Collagen

C75 H91 N19 O16a

1.42b

2.4 × 1010

12.8 × 1010

HAp

Ca5(PO4)3OHc

3.2d

4.2 × 1010

27.3 × 1010

Water

H2O

1.0

− 0.6 × 1010

9.4 × 1010

  1. aFrom Ref.41.
  2. bFrom Ref.42.
  3. cFrom Ref.43.
  4. dFrom Ref.44.
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