Secondary standard
NOTES: Homogeneous, but stay away from cracks and inclusions.
 |  |
| Position | 88 |
| Mineral | Anorthite |
| Sample Name | An |
| Type | Feldspar |
| Nominal formula | CaAl2Si2O8 |
| Supplier | Cannon Microprobe, Seattle, WA |
| Source | Honshu, Japan |
| Original reported analysis | Semi-quantitative analysis |
| Composition quality | Secondary standard |
| Comments | Analysis shown is based on EDS and stoichiometric constraints. Somewhat more anorthite-rich than the original semi-quant. |
| O Na Al Si Ca Fe | 46.02 0.28 18.93 20.54 13.92 0.31 |
