Secondary standard
NOTES: Homogeneous, but stay away from numerous inclusions and pits.
 |  |
| Position | 39 |
| Mineral | Diopside |
| Sample Name | Di |
| Type | Pyroxene |
| Nominal formula | CaMg[Si2O6] |
| Supplier | Cannon Microprobe, Seattle, WA |
| Source | Ala Valley, (Val d’ Osta?) Italy |
| Original reported analysis | Quantitative analysis at Cannon Microprobe. |
| Composition quality | Secondary standard |
| Comments | Quantitative analysis plus EDS plus stoichiometric refinement of both for the analysis reported here. This must be from a calc-silicate rock. |
| O Mg Al Si Ca Fe | 43.99 10.18 0.31 25.42 19.54 0.57 |
