Primary standard
NOTES: Homogeneous, pure ZnS.
 |  |
| Position | 9 |
| Mineral | Sphalerite |
| Sample Name | Sph |
| Type | Sulfide |
| Nominal formula | ZnS |
| Supplier | Cannon Microprobe, Seattle, WA |
| Source | Synthetic, made by G. Czmanske, USGS |
| Original reported analysis | Calculated from ideal formula |
| Composition quality | Primary standard |
| Comments | Purity = 99.99% |
| S Zn | 32.91 67.09 |
