Secondary standard
NOTES: Homogeneous, but stay away from altered cracks.
 |  |
| Position | 80 |
| Mineral | Bytownite |
| Sample Name | Byt |
| Type | Feldspar |
| Nominal formula | (Ca,Na)(Al,Si)4O8 |
| Supplier | Cannon Microprobe, Seattle, WA |
| Source | Crystal Bay, Minnesota. Ward’s Natural Science |
| Original reported analysis | Semi-quantitative analysis |
| Composition quality | Secondary standard |
| Comments | Analysis shown is based on EDS and stoichiometric constraints. |
| O Na Al Si K Ca Fe | 46.44 1.59 17.51 22.39 0.09 11.68 0.3 |
