Table 1.
Chemical composition of Perlite from various sources.
| Origin | US | Greece | Turkey | Hungary | Yemen | Korea | Bulgaria | Slovakia |
|---|---|---|---|---|---|---|---|---|
| SiO2 | 65–77.5 | 71–75 | 71–75 | 68–75 | 65–75 | 68–69 | 70–80 | 68–73 |
| Al2O3 | 11–18 | 12–16 | 12.5–18 | 10–15 | 9.4–12.8 | 11.95–15.8 | 10–15 | 7.5–15 |
| Na2O | 2.4–4.6 | 3.0–4.0 | 2.9–4.0 | 2.8–4.5 | 3.37–4.25 | 3.2–4.4 | <10 | 2.5–5.0 |
| K2O | 1.4–5.7 | 4.0–5.0 | 4.0–5.0 | 3.2–4.5 | 3.6–4.1 | 2–3.94 | <10 | 2–5.5 |
| Fe2O3 | 0.5–2.2 | 0.5–2.0 | 0.1–1.5 | 1.0–2.5 | 2.68–3.66 | 0.7–1.63 | <1.5 | 1.0–2.0 |
| MgO | 0.1–0.7 | 0.2–0.7 | 0.03–0.5 | 0.2–1.5 | 0.5–0.93 | 0.35–0.48 | <1.0 | <1.0 |
| CaO | 0.5–3.6 | 0.5–1.5 | 0.5–2.0 | 1.5–2.0 | 0.87–1.84 | 1.57–1.89 | <1.5 | 0.5–2.0 |
| Loss on ignition | 2–5 | 2–5 | 4.1 | 2.0–5.0 | 0.35–3.94 | NR | <5 | 3.0–4.1 |
| Source | Diverse | Sampatakakis et al., 2013 | Doğan & Alkan, 2004; Kabra et al., 2013 | Mineralholding Ltd. | Sa’ad et al., 2010 | Noh & Boles, 1989 | Yanevaet al., 2012 | LB Minerals |
Mineralholding Ltd. Data available at http://www.mineralholding.hu/ipariasvanyok/en/raw_perlite.html.
Data for US taken from various mines, mineral deposit reports, and technical data sheets. Illustrative sources include Coombs, 1952; Ennis, 2011; USEPA, 1995b; Huntting, 1949; Jaster, 1956; Rotella & Simandl, 1995; and Simandi et al., 1995. Endpoints of ranges may come from different deposits. Ore from all countries may contain additional minor components (e.g. TiO2).