**3.2.6. EBDS analysis**

**Fig. 20.** SEM image of the break plane of investigated fluorapatite specimen: 50× (a), 75× (b), 1 000× (c) and 5 000× (d).

140 Apatites and their Synthetic Analogues - Synthesis, Structure, Properties and Applications

**Fig. 21.** Typical results of WDX analysis of the fluorapatite specimen and simulation of electron–specimen interaction.

The fragments of investigated fluorapatite specimens (**Fig. 22**) were further investigated by EBDS analysis.

**Fig. 22.** Sample stage (a) and microphotograph of fluorapatite fragments used for EBDS (b).

The Kikuchi patterns confirm the sample as single crystal of fluorapatite **Fig. 23**.

<sup>26.</sup> Resulting from the apatite formula (**Section 1.4**).

**Fig. 23.** EBDS analysis of investigated fluorapatite specimen.

**Fig. 24.** The Kikuchi sphere showing the orientation of apatite crystal break plane.

The Kikuchi sphere in **Fig. 24** shows the orientation of the sample that is in agreement with indistinct cleavage of fluorapatite to the direction given by Miller-Bravais indices of {0001}.
