Mineral composition |
Atacamite |
12.5 – 18.8% |
Clinoatacamite |
80.0 – 85.6% |
Botallackite |
0.0 – 1.2% |
Tenorite (copper oxide) |
0.2 – 2.5% |
Alpha-crystals (sum of atacamite and clinoatacamite) |
97.4 – 98.9% |
Additive composition |
Moisture |
0.2 – 0.4% |
Copper |
≥ 53.0% |
Purity |
≥ 90.0% |
Binding agent |
ca. 5% |
Appearance |
Green crystalline powder |
Physico-chemical specifications |
Bulk density, loose
Bulk density, tapped |
862 – 1088 kg/m3
909 – 1137 kg/m3 |
Dusting potential |
0.22 – 0.30 g/m3 |
Particle size (measured by laser diffraction) |
188 – 218 µm
Less than 5% w/w of particles of diameter ≤50 µm |
Impurities |
Arsenic |
<1.0 – 1.36 mg/kg |
Lead |
17.6 – 33.4 mg/kg |
Cadmium |
<0.4 mg/kg |
Mercury |
<0.01 mg/kg |
Dioxins |
0.088 – 0.170 ng/kg |
Sum of dioxins and dioxin-like PCBs |
0.14 – 0.21 ng/kg |
Non-dioxin-like PCBs |
<0.41 – 0.52 µg/kg |