journal menu
![[Figure 4]](nb5092fig4mag.jpg)
|
|
Figure 4
Combined XMT and XRD results on two micrometeorites. (a) XMT reconstruction of sample A, voxel size 0.5 × 0.5 × 0.5 µm. Green arrows indicate the beam paths for XRD measurements. Scale bar 200 µm. (b) Scattering pattern obtained from sample A, corresponding to the horizontal arrow in (a). (c) Vertical slice through the XMT reconstruction of sample B, voxel size 0.5 × 0.5 × 0.5 µm. Markings indicate XRD beam paths, with the beam coming out of the page at the location of the red circle. The dark round object at the bottom is an inclusion of less attenuating material within the micrometeorite. Scale bar 200 µm. (d) Scattering pattern corresponding to the red circle in (c). The scattering beam was perpendicular to the page, completely missing the inclusion. (e) Scattering pattern corresponding to the blue arrow in (c), where the beam passed through the inclusion in the micrometeorite. White arrows indicate reflections arising from the inclusion. (f) Integrated radial intensity profiles after background subtraction. The horizontal axis is scattering vector magnitude in units of Å−1, and the vertical axes are intensities (integrated counts over 30 min). The green line at the top corresponds to sample A (average of the two measurements), the red and blue lines in the middle correspond to panels (d) and (e) (black arrows indicate two diffraction peaks arising from the inclusion), and the dashed black line at the bottom is a typical background intensity from the sample holder. The stem graph shows the expected peak positions and relative intensities of hortonolite, an intermediate member of the solid solution series between olivine minerals fayalite and forsterite (data from Brown & Prewitt, 1973  ). For clarity, only the reflections with relative intensity greater than 10% are shown. |
![[Figure 4]](nb5092fig4.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
