Table 1 The refined unit cell parameters and the cell volume of pure HAp and the HAp:RE3+ powders.

From: Rare-earth (Gd3+,Yb3+/Tm3+, Eu3+) co-doped hydroxyapatite as magnetic, up-conversion and down-conversion materials for multimodal imaging

Sampleas

The unit cell parameters

a (Å)

c (Å)

V (Å3)

HAp

9.4399(6)

6.8850(4)

531.34(2)

HAp:Gd

9.4303(3)

6.8838(3)

530.16(2)

HAp:Gd/Yb/Tm

9.4248(2)

6.8803(1)

529.28(3)

HAp:Gd/Eu

9.4277(2)

6.8829(1)

529.80(2)

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