TABLE 2.
Mg/P/Ca atomic ratios within type III inclusions formed by strain XQGS-1 cells versus calcium carbonate formed by cyanobacteriaa
| Atomic ratio |
|||
|---|---|---|---|
| Inclusion | Mg Kα | P Kα | Ca Kα |
| Type III inclusion 1 | 3.95 | 4.42 | 91.63 |
| Type III inclusion 2 | 6.64 | 0 | 93.36 |
| Type III inclusion 3 | 0 | 0 | 100 |
| Type III inclusion 4 | 3.74 | 2.75 | 93.51 |
| Type III inclusion 5 | 2.49 | 1.64 | 95.87 |
| Type III inclusion 6 | 0 | 0 | 100 |
| Type III inclusion 7 | 0 | 0 | 100 |
| Type III inclusion 8 | 3.49 | 1.51 | 94.02 |
| Type III inclusion 9 | 3.47 | 0 | 96.53 |
| Type III inclusion 10 | 0.96 | 0 | 99.04 |
| Avg | 2.5 | 1.0 | 96.5 |
| Calcium carbonate 1 | 0.68 | 0.33 | 98.99 |
| Calcium carbonate 2 | 0 | 0.81 | 99.19 |
| Calcium carbonate 3 | 0 | 0 | 100 |
| Calcium carbonate 4 | 0 | 0 | 100 |
| Calcium carbonate 5 | 0.51 | 0.71 | 98.78 |
| Calcium carbonate 6 | 1.14 | 3.13 | 95.73 |
| Calcium carbonate 7 | 0 | 0 | 100 |
| Calcium carbonate 8 | 0 | 4.59 | 95.41 |
| Calcium carbonate 9 | 1.78 | 2.14 | 96.08 |
| Calcium carbonate 10 | 0 | 4.95 | 95.05 |
| Avg | 0.4 | 1.67 | 97.9 |
a
See reference 30. Positions of type III inclusions on STEM-HAADF images are shown in Fig. S4 and S5 in the supplemental material. Kα, the X ray is emitted when vacancy in K-shell is filled by a transition from L-shell.