Composition
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