Barytes jointing sands are off white barytes, specially selected and graded for use in barytes mortar and barytes
render for the protection against radiation in hospitals, research laboratories and factories etc. Barytes jointing sand should be used in conjunction with Barytes shielding bricks.
The following table based on historical data and provides an indication of the chemistry and physical properties of this particular grade.
| Parameter | unit | value |
| BaSO4 | % | 95.0 minimum |
| SiO2 | % | 1.5 |
| CaO | % | 0.9 |
| Fe2O3 | % | 0.07 |
| Al2O3 | % | 0.13 |
| Specific gravity | g/cc | 4.25 minimum |
| Grading - passing 2mm | % | 99 minimum |