Primary standard
NOTES: Homogeneous. Green area to the lower left (X-ray map) is not a different mineral, but a sloping cleavage surface.
 |  |
| Position | 57 |
| Mineral | Dolomite |
| Sample Name | Dol |
| Type | Carbonate |
| Nominal formula | CaMg(CO3)2 |
| Supplier | Cannon Microprobe, Seattle, WA |
| Source | Unknown |
| Original reported analysis | Harvard oxygen standard, analysis with oxygen as a discrete element, American Mineralogist, Volume 77, pages 1087-1091, 1993. |
| Composition quality | Primary standard |
| Comments | Am. Min. analysis modified slightly to better fit stoichiometry. Very similar to EDS analysis, including carbon. |
| C O Mg Ca Mn Fe | 13.01 51.99 13.08 21.66 0.2 0.06 |
