| Element | % | | Oxide | % |
| O | 39.69 | | | |
| Mg | 60.31 | | MgO | 100.00 |
|
|
|
| Sum | 100.0 | | Sum | 100.0 |
|
|  | |
| 200 µ m
| |
|
This is a reflected light micrograph of a synthetic, polished, carbon
coated magnesium oxide crystal.
The identifying etched label, which is a feature
of our standards, is invaluable for navigating in an electron beam instrument.
This is a good standard for high concentrations of Mg, particularly in
oxide or silicate matrices, and also a good oxygen standard. The pure element oxidizes easily,
whereas in this form it is extremely stable with a good surface.
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